Blame view
kernel/audit.c
52.5 KB
85c8721ff audit: update poi... |
1 |
/* audit.c -- Auditing support |
1da177e4c Linux-2.6.12-rc2 |
2 3 4 |
* Gateway between the kernel (e.g., selinux) and the user-space audit daemon. * System-call specific features have moved to auditsc.c * |
6a01b07fa [PATCH] audit con... |
5 |
* Copyright 2003-2007 Red Hat Inc., Durham, North Carolina. |
1da177e4c Linux-2.6.12-rc2 |
6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 |
* All Rights Reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * Written by Rickard E. (Rik) Faith <faith@redhat.com> * |
d7a96f3a1 Audit: internally... |
24 |
* Goals: 1) Integrate fully with Security Modules. |
1da177e4c Linux-2.6.12-rc2 |
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 |
* 2) Minimal run-time overhead: * a) Minimal when syscall auditing is disabled (audit_enable=0). * b) Small when syscall auditing is enabled and no audit record * is generated (defer as much work as possible to record * generation time): * i) context is allocated, * ii) names from getname are stored without a copy, and * iii) inode information stored from path_lookup. * 3) Ability to disable syscall auditing at boot time (audit=0). * 4) Usable by other parts of the kernel (if audit_log* is called, * then a syscall record will be generated automatically for the * current syscall). * 5) Netlink interface to user-space. * 6) Support low-overhead kernel-based filtering to minimize the * information that must be passed to user-space. * |
85c8721ff audit: update poi... |
41 |
* Example user-space utilities: http://people.redhat.com/sgrubb/audit/ |
1da177e4c Linux-2.6.12-rc2 |
42 |
*/ |
d957f7b72 audit: Use more c... |
43 |
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
1da177e4c Linux-2.6.12-rc2 |
44 |
#include <linux/init.h> |
7153e4027 ipc, kernel: use ... |
45 |
#include <linux/types.h> |
60063497a atomic: use <linu... |
46 |
#include <linux/atomic.h> |
1da177e4c Linux-2.6.12-rc2 |
47 |
#include <linux/mm.h> |
9984de1a5 kernel: Map most ... |
48 |
#include <linux/export.h> |
5a0e3ad6a include cleanup: ... |
49 |
#include <linux/slab.h> |
b7d112581 AUDIT: Send netli... |
50 51 |
#include <linux/err.h> #include <linux/kthread.h> |
46e959ea2 audit: add an opt... |
52 |
#include <linux/kernel.h> |
b24a30a73 audit: fix event ... |
53 |
#include <linux/syscalls.h> |
1da177e4c Linux-2.6.12-rc2 |
54 55 56 57 |
#include <linux/audit.h> #include <net/sock.h> |
93315ed6d [PATCH] audit str... |
58 |
#include <net/netlink.h> |
1da177e4c Linux-2.6.12-rc2 |
59 |
#include <linux/skbuff.h> |
131ad62d8 netfilter: add SE... |
60 61 62 |
#ifdef CONFIG_SECURITY #include <linux/security.h> #endif |
7dfb71030 [PATCH] Add inclu... |
63 |
#include <linux/freezer.h> |
522ed7767 Audit: add TTY in... |
64 |
#include <linux/tty.h> |
34e36d8ec audit: Limit audi... |
65 |
#include <linux/pid_namespace.h> |
33faba7fa audit: listen in ... |
66 |
#include <net/netns/generic.h> |
3dc7e3153 [PATCH] support f... |
67 68 |
#include "audit.h" |
1da177e4c Linux-2.6.12-rc2 |
69 |
|
a3f07114e [PATCH] Audit: ma... |
70 |
/* No auditing will take place until audit_initialized == AUDIT_INITIALIZED. |
1da177e4c Linux-2.6.12-rc2 |
71 |
* (Initialization happens after skb_init is called.) */ |
a3f07114e [PATCH] Audit: ma... |
72 73 74 |
#define AUDIT_DISABLED -1 #define AUDIT_UNINITIALIZED 0 #define AUDIT_INITIALIZED 1 |
1da177e4c Linux-2.6.12-rc2 |
75 |
static int audit_initialized; |
1a6b9f231 [AUDIT] make audi... |
76 77 78 |
#define AUDIT_OFF 0 #define AUDIT_ON 1 #define AUDIT_LOCKED 2 |
3e1d0bb62 audit: Convert in... |
79 80 |
u32 audit_enabled; u32 audit_ever_enabled; |
1da177e4c Linux-2.6.12-rc2 |
81 |
|
ae9d67aff audit: export sym... |
82 |
EXPORT_SYMBOL_GPL(audit_enabled); |
1da177e4c Linux-2.6.12-rc2 |
83 |
/* Default state when kernel boots without any parameters. */ |
3e1d0bb62 audit: Convert in... |
84 |
static u32 audit_default; |
1da177e4c Linux-2.6.12-rc2 |
85 86 |
/* If auditing cannot proceed, audit_failure selects what happens. */ |
3e1d0bb62 audit: Convert in... |
87 |
static u32 audit_failure = AUDIT_FAIL_PRINTK; |
1da177e4c Linux-2.6.12-rc2 |
88 |
|
75c0371a2 audit: netlink so... |
89 90 |
/* * If audit records are to be written to the netlink socket, audit_pid |
15e473046 netlink: Rename p... |
91 92 |
* contains the pid of the auditd process and audit_nlk_portid contains * the portid to use to send netlink messages to that process. |
75c0371a2 audit: netlink so... |
93 |
*/ |
c2f0c7c35 The attached patc... |
94 |
int audit_pid; |
f9441639e audit: fix netlin... |
95 |
static __u32 audit_nlk_portid; |
1da177e4c Linux-2.6.12-rc2 |
96 |
|
b0dd25a82 [PATCH] AUDIT: ke... |
97 |
/* If audit_rate_limit is non-zero, limit the rate of sending audit records |
1da177e4c Linux-2.6.12-rc2 |
98 99 |
* to that number per second. This prevents DoS attacks, but results in * audit records being dropped. */ |
3e1d0bb62 audit: Convert in... |
100 |
static u32 audit_rate_limit; |
1da177e4c Linux-2.6.12-rc2 |
101 |
|
40c0775e5 audit: allow unli... |
102 103 |
/* Number of outstanding audit_buffers allowed. * When set to zero, this means unlimited. */ |
3e1d0bb62 audit: Convert in... |
104 |
static u32 audit_backlog_limit = 64; |
e789e561a audit: reset audi... |
105 |
#define AUDIT_BACKLOG_WAIT_TIME (60 * HZ) |
3e1d0bb62 audit: Convert in... |
106 107 |
static u32 audit_backlog_wait_time = AUDIT_BACKLOG_WAIT_TIME; static u32 audit_backlog_wait_overflow = 0; |
1da177e4c Linux-2.6.12-rc2 |
108 |
|
c2f0c7c35 The attached patc... |
109 |
/* The identity of the user shutting down the audit system. */ |
cca080d9b userns: Convert a... |
110 |
kuid_t audit_sig_uid = INVALID_UID; |
c2f0c7c35 The attached patc... |
111 |
pid_t audit_sig_pid = -1; |
e1396065e [PATCH] collect s... |
112 |
u32 audit_sig_sid = 0; |
c2f0c7c35 The attached patc... |
113 |
|
1da177e4c Linux-2.6.12-rc2 |
114 115 116 117 118 119 120 121 122 123 124 |
/* Records can be lost in several ways: 0) [suppressed in audit_alloc] 1) out of memory in audit_log_start [kmalloc of struct audit_buffer] 2) out of memory in audit_log_move [alloc_skb] 3) suppressed due to audit_rate_limit 4) suppressed due to audit_backlog_limit */ static atomic_t audit_lost = ATOMIC_INIT(0); /* The netlink socket. */ static struct sock *audit_sock; |
c0a8d9b06 audit: reduce sco... |
125 |
static int audit_net_id; |
1da177e4c Linux-2.6.12-rc2 |
126 |
|
f368c07d7 [PATCH] audit: pa... |
127 128 |
/* Hash for inode-based rules */ struct list_head audit_inode_hash[AUDIT_INODE_BUCKETS]; |
b7d112581 AUDIT: Send netli... |
129 |
/* The audit_freelist is a list of pre-allocated audit buffers (if more |
1da177e4c Linux-2.6.12-rc2 |
130 131 |
* than AUDIT_MAXFREE are in use, the audit buffer is freed instead of * being placed on the freelist). */ |
1da177e4c Linux-2.6.12-rc2 |
132 |
static DEFINE_SPINLOCK(audit_freelist_lock); |
b0dd25a82 [PATCH] AUDIT: ke... |
133 |
static int audit_freelist_count; |
1da177e4c Linux-2.6.12-rc2 |
134 |
static LIST_HEAD(audit_freelist); |
b7d112581 AUDIT: Send netli... |
135 |
static struct sk_buff_head audit_skb_queue; |
f3d357b09 Audit: save audit... |
136 137 |
/* queue of skbs to send to auditd when/if it comes back */ static struct sk_buff_head audit_skb_hold_queue; |
b7d112581 AUDIT: Send netli... |
138 139 |
static struct task_struct *kauditd_task; static DECLARE_WAIT_QUEUE_HEAD(kauditd_wait); |
9ad9ad385 AUDIT: Wait for b... |
140 |
static DECLARE_WAIT_QUEUE_HEAD(audit_backlog_wait); |
1da177e4c Linux-2.6.12-rc2 |
141 |
|
b0fed4021 audit: implement ... |
142 143 144 145 |
static struct audit_features af = {.vers = AUDIT_FEATURE_VERSION, .mask = -1, .features = 0, .lock = 0,}; |
21b85c31d audit: audit feat... |
146 |
static char *audit_feature_names[2] = { |
d040e5af3 audit: audit feat... |
147 |
"only_unset_loginuid", |
21b85c31d audit: audit feat... |
148 |
"loginuid_immutable", |
b0fed4021 audit: implement ... |
149 |
}; |
f368c07d7 [PATCH] audit: pa... |
150 |
/* Serialize requests from userspace. */ |
916d75761 Fix rule eviction... |
151 |
DEFINE_MUTEX(audit_cmd_mutex); |
1da177e4c Linux-2.6.12-rc2 |
152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 |
/* AUDIT_BUFSIZ is the size of the temporary buffer used for formatting * audit records. Since printk uses a 1024 byte buffer, this buffer * should be at least that large. */ #define AUDIT_BUFSIZ 1024 /* AUDIT_MAXFREE is the number of empty audit_buffers we keep on the * audit_freelist. Doing so eliminates many kmalloc/kfree calls. */ #define AUDIT_MAXFREE (2*NR_CPUS) /* The audit_buffer is used when formatting an audit record. The caller * locks briefly to get the record off the freelist or to allocate the * buffer, and locks briefly to send the buffer to the netlink layer or * to place it on a transmit queue. Multiple audit_buffers can be in * use simultaneously. */ struct audit_buffer { struct list_head list; |
8fc6115c2 AUDIT: expand aud... |
169 |
struct sk_buff *skb; /* formatted skb ready to send */ |
1da177e4c Linux-2.6.12-rc2 |
170 |
struct audit_context *ctx; /* NULL or associated context */ |
9796fdd82 [PATCH] gfp_t: ke... |
171 |
gfp_t gfp_mask; |
1da177e4c Linux-2.6.12-rc2 |
172 |
}; |
f09ac9db2 Audit: stop deadl... |
173 |
struct audit_reply { |
f9441639e audit: fix netlin... |
174 |
__u32 portid; |
638a0fd2a audit: Use struct... |
175 |
struct net *net; |
f09ac9db2 Audit: stop deadl... |
176 177 |
struct sk_buff *skb; }; |
f9441639e audit: fix netlin... |
178 |
static void audit_set_portid(struct audit_buffer *ab, __u32 portid) |
c04049939 AUDIT: Add messag... |
179 |
{ |
50397bd1e [AUDIT] clean up ... |
180 181 |
if (ab) { struct nlmsghdr *nlh = nlmsg_hdr(ab->skb); |
f9441639e audit: fix netlin... |
182 |
nlh->nlmsg_pid = portid; |
50397bd1e [AUDIT] clean up ... |
183 |
} |
c04049939 AUDIT: Add messag... |
184 |
} |
8c8570fb8 [PATCH] Capture s... |
185 |
void audit_panic(const char *message) |
1da177e4c Linux-2.6.12-rc2 |
186 |
{ |
d957f7b72 audit: Use more c... |
187 |
switch (audit_failure) { |
1da177e4c Linux-2.6.12-rc2 |
188 189 190 |
case AUDIT_FAIL_SILENT: break; case AUDIT_FAIL_PRINTK: |
320f1b1ed [AUDIT] ratelimit... |
191 |
if (printk_ratelimit()) |
d957f7b72 audit: Use more c... |
192 193 |
pr_err("%s ", message); |
1da177e4c Linux-2.6.12-rc2 |
194 195 |
break; case AUDIT_FAIL_PANIC: |
b29ee87e9 [RFC] AUDIT: do n... |
196 197 198 199 |
/* test audit_pid since printk is always losey, why bother? */ if (audit_pid) panic("audit: %s ", message); |
1da177e4c Linux-2.6.12-rc2 |
200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 |
break; } } static inline int audit_rate_check(void) { static unsigned long last_check = 0; static int messages = 0; static DEFINE_SPINLOCK(lock); unsigned long flags; unsigned long now; unsigned long elapsed; int retval = 0; if (!audit_rate_limit) return 1; spin_lock_irqsave(&lock, flags); if (++messages < audit_rate_limit) { retval = 1; } else { now = jiffies; elapsed = now - last_check; if (elapsed > HZ) { last_check = now; messages = 0; retval = 1; } } spin_unlock_irqrestore(&lock, flags); return retval; } |
b0dd25a82 [PATCH] AUDIT: ke... |
232 233 234 235 236 237 238 239 |
/** * audit_log_lost - conditionally log lost audit message event * @message: the message stating reason for lost audit message * * Emit at least 1 message per second, even if audit_rate_check is * throttling. * Always increment the lost messages counter. */ |
1da177e4c Linux-2.6.12-rc2 |
240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 |
void audit_log_lost(const char *message) { static unsigned long last_msg = 0; static DEFINE_SPINLOCK(lock); unsigned long flags; unsigned long now; int print; atomic_inc(&audit_lost); print = (audit_failure == AUDIT_FAIL_PANIC || !audit_rate_limit); if (!print) { spin_lock_irqsave(&lock, flags); now = jiffies; if (now - last_msg > HZ) { print = 1; last_msg = now; } spin_unlock_irqrestore(&lock, flags); } if (print) { |
320f1b1ed [AUDIT] ratelimit... |
263 |
if (printk_ratelimit()) |
3e1d0bb62 audit: Convert in... |
264 265 |
pr_warn("audit_lost=%u audit_rate_limit=%u audit_backlog_limit=%u ", |
320f1b1ed [AUDIT] ratelimit... |
266 267 268 |
atomic_read(&audit_lost), audit_rate_limit, audit_backlog_limit); |
1da177e4c Linux-2.6.12-rc2 |
269 270 |
audit_panic(message); } |
1da177e4c Linux-2.6.12-rc2 |
271 |
} |
3e1d0bb62 audit: Convert in... |
272 |
static int audit_log_config_change(char *function_name, u32 new, u32 old, |
2532386f4 Audit: collect se... |
273 |
int allow_changes) |
1da177e4c Linux-2.6.12-rc2 |
274 |
{ |
1a6b9f231 [AUDIT] make audi... |
275 276 |
struct audit_buffer *ab; int rc = 0; |
ce29b682e [PATCH] More user... |
277 |
|
1a6b9f231 [AUDIT] make audi... |
278 |
ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_CONFIG_CHANGE); |
0644ec0cc audit: catch poss... |
279 280 |
if (unlikely(!ab)) return rc; |
3e1d0bb62 audit: Convert in... |
281 |
audit_log_format(ab, "%s=%u old=%u", function_name, new, old); |
4d3fb709b helper for some s... |
282 |
audit_log_session_info(ab); |
b122c3767 audit: use a cons... |
283 284 285 |
rc = audit_log_task_context(ab); if (rc) allow_changes = 0; /* Something weird, deny request */ |
1a6b9f231 [AUDIT] make audi... |
286 287 |
audit_log_format(ab, " res=%d", allow_changes); audit_log_end(ab); |
6a01b07fa [PATCH] audit con... |
288 |
return rc; |
1da177e4c Linux-2.6.12-rc2 |
289 |
} |
3e1d0bb62 audit: Convert in... |
290 |
static int audit_do_config_change(char *function_name, u32 *to_change, u32 new) |
1da177e4c Linux-2.6.12-rc2 |
291 |
{ |
3e1d0bb62 audit: Convert in... |
292 293 |
int allow_changes, rc = 0; u32 old = *to_change; |
6a01b07fa [PATCH] audit con... |
294 295 |
/* check if we are locked */ |
1a6b9f231 [AUDIT] make audi... |
296 297 |
if (audit_enabled == AUDIT_LOCKED) allow_changes = 0; |
6a01b07fa [PATCH] audit con... |
298 |
else |
1a6b9f231 [AUDIT] make audi... |
299 |
allow_changes = 1; |
ce29b682e [PATCH] More user... |
300 |
|
1a6b9f231 [AUDIT] make audi... |
301 |
if (audit_enabled != AUDIT_OFF) { |
dc9eb698f audit: stop pushi... |
302 |
rc = audit_log_config_change(function_name, new, old, allow_changes); |
1a6b9f231 [AUDIT] make audi... |
303 304 |
if (rc) allow_changes = 0; |
6a01b07fa [PATCH] audit con... |
305 |
} |
6a01b07fa [PATCH] audit con... |
306 307 |
/* If we are allowed, make the change */ |
1a6b9f231 [AUDIT] make audi... |
308 309 |
if (allow_changes == 1) *to_change = new; |
6a01b07fa [PATCH] audit con... |
310 311 312 313 |
/* Not allowed, update reason */ else if (rc == 0) rc = -EPERM; return rc; |
1da177e4c Linux-2.6.12-rc2 |
314 |
} |
3e1d0bb62 audit: Convert in... |
315 |
static int audit_set_rate_limit(u32 limit) |
1da177e4c Linux-2.6.12-rc2 |
316 |
{ |
dc9eb698f audit: stop pushi... |
317 |
return audit_do_config_change("audit_rate_limit", &audit_rate_limit, limit); |
1a6b9f231 [AUDIT] make audi... |
318 |
} |
ce29b682e [PATCH] More user... |
319 |
|
3e1d0bb62 audit: Convert in... |
320 |
static int audit_set_backlog_limit(u32 limit) |
1a6b9f231 [AUDIT] make audi... |
321 |
{ |
dc9eb698f audit: stop pushi... |
322 |
return audit_do_config_change("audit_backlog_limit", &audit_backlog_limit, limit); |
1a6b9f231 [AUDIT] make audi... |
323 |
} |
6a01b07fa [PATCH] audit con... |
324 |
|
3e1d0bb62 audit: Convert in... |
325 |
static int audit_set_backlog_wait_time(u32 timeout) |
51cc83f02 audit: add audit_... |
326 327 328 329 |
{ return audit_do_config_change("audit_backlog_wait_time", &audit_backlog_wait_time, timeout); } |
3e1d0bb62 audit: Convert in... |
330 |
static int audit_set_enabled(u32 state) |
1a6b9f231 [AUDIT] make audi... |
331 |
{ |
b593d384e [AUDIT] create co... |
332 |
int rc; |
1a6b9f231 [AUDIT] make audi... |
333 334 |
if (state < AUDIT_OFF || state > AUDIT_LOCKED) return -EINVAL; |
6a01b07fa [PATCH] audit con... |
335 |
|
dc9eb698f audit: stop pushi... |
336 |
rc = audit_do_config_change("audit_enabled", &audit_enabled, state); |
b593d384e [AUDIT] create co... |
337 338 339 340 |
if (!rc) audit_ever_enabled |= !!state; return rc; |
1da177e4c Linux-2.6.12-rc2 |
341 |
} |
3e1d0bb62 audit: Convert in... |
342 |
static int audit_set_failure(u32 state) |
1da177e4c Linux-2.6.12-rc2 |
343 |
{ |
1da177e4c Linux-2.6.12-rc2 |
344 345 346 347 |
if (state != AUDIT_FAIL_SILENT && state != AUDIT_FAIL_PRINTK && state != AUDIT_FAIL_PANIC) return -EINVAL; |
ce29b682e [PATCH] More user... |
348 |
|
dc9eb698f audit: stop pushi... |
349 |
return audit_do_config_change("audit_failure", &audit_failure, state); |
1da177e4c Linux-2.6.12-rc2 |
350 |
} |
f3d357b09 Audit: save audit... |
351 352 353 354 355 356 357 358 359 360 361 362 |
/* * Queue skbs to be sent to auditd when/if it comes back. These skbs should * already have been sent via prink/syslog and so if these messages are dropped * it is not a huge concern since we already passed the audit_log_lost() * notification and stuff. This is just nice to get audit messages during * boot before auditd is running or messages generated while auditd is stopped. * This only holds messages is audit_default is set, aka booting with audit=1 * or building your kernel that way. */ static void audit_hold_skb(struct sk_buff *skb) { if (audit_default && |
40c0775e5 audit: allow unli... |
363 364 |
(!audit_backlog_limit || skb_queue_len(&audit_skb_hold_queue) < audit_backlog_limit)) |
f3d357b09 Audit: save audit... |
365 366 367 368 |
skb_queue_tail(&audit_skb_hold_queue, skb); else kfree_skb(skb); } |
038cbcf65 Audit: unify the ... |
369 370 371 372 373 374 375 |
/* * For one reason or another this nlh isn't getting delivered to the userspace * audit daemon, just send it to printk. */ static void audit_printk_skb(struct sk_buff *skb) { struct nlmsghdr *nlh = nlmsg_hdr(skb); |
c64e66c67 audit: netlink: M... |
376 |
char *data = nlmsg_data(nlh); |
038cbcf65 Audit: unify the ... |
377 378 379 |
if (nlh->nlmsg_type != AUDIT_EOE) { if (printk_ratelimit()) |
d957f7b72 audit: Use more c... |
380 381 |
pr_notice("type=%d %s ", nlh->nlmsg_type, data); |
038cbcf65 Audit: unify the ... |
382 |
else |
f12835276 audit: remove str... |
383 |
audit_log_lost("printk limit exceeded"); |
038cbcf65 Audit: unify the ... |
384 385 386 387 |
} audit_hold_skb(skb); } |
f3d357b09 Audit: save audit... |
388 389 390 391 392 |
static void kauditd_send_skb(struct sk_buff *skb) { int err; /* take a reference in case we can't send it and we want to hold it */ skb_get(skb); |
15e473046 netlink: Rename p... |
393 |
err = netlink_unicast(audit_sock, skb, audit_nlk_portid, 0); |
f3d357b09 Audit: save audit... |
394 |
if (err < 0) { |
c9404c9c3 Fix misspelling o... |
395 |
BUG_ON(err != -ECONNREFUSED); /* Shouldn't happen */ |
04ee1a3b8 audit: get rid of... |
396 |
if (audit_pid) { |
d957f7b72 audit: Use more c... |
397 398 |
pr_err("*NO* daemon at audit_pid=%d ", audit_pid); |
f12835276 audit: remove str... |
399 |
audit_log_lost("auditd disappeared"); |
04ee1a3b8 audit: get rid of... |
400 401 402 |
audit_pid = 0; audit_sock = NULL; } |
f3d357b09 Audit: save audit... |
403 404 405 406 |
/* we might get lucky and get this in the next auditd */ audit_hold_skb(skb); } else /* drop the extra reference if sent ok */ |
70d4bf6d4 drop_monitor: con... |
407 |
consume_skb(skb); |
f3d357b09 Audit: save audit... |
408 |
} |
b551d1d98 audit: refactor h... |
409 |
/* |
451f92163 audit: add netlin... |
410 411 412 413 414 |
* kauditd_send_multicast_skb - send the skb to multicast userspace listeners * * This function doesn't consume an skb as might be expected since it has to * copy it anyways. */ |
54dc77d97 audit: use suppli... |
415 |
static void kauditd_send_multicast_skb(struct sk_buff *skb, gfp_t gfp_mask) |
451f92163 audit: add netlin... |
416 417 418 419 |
{ struct sk_buff *copy; struct audit_net *aunet = net_generic(&init_net, audit_net_id); struct sock *sock = aunet->nlsk; |
7f74ecd78 audit: send multi... |
420 421 |
if (!netlink_has_listeners(sock, AUDIT_NLGRP_READLOG)) return; |
451f92163 audit: add netlin... |
422 423 424 425 426 427 428 429 430 431 |
/* * The seemingly wasteful skb_copy() rather than bumping the refcount * using skb_get() is necessary because non-standard mods are made to * the skb by the original kaudit unicast socket send routine. The * existing auditd daemon assumes this breakage. Fixing this would * require co-ordinating a change in the established protocol between * the kaudit kernel subsystem and the auditd userspace code. There is * no reason for new multicast clients to continue with this * non-compliance. */ |
54dc77d97 audit: use suppli... |
432 |
copy = skb_copy(skb, gfp_mask); |
451f92163 audit: add netlin... |
433 434 |
if (!copy) return; |
54dc77d97 audit: use suppli... |
435 |
nlmsg_multicast(sock, copy, 0, AUDIT_NLGRP_READLOG, gfp_mask); |
451f92163 audit: add netlin... |
436 437 438 |
} /* |
b551d1d98 audit: refactor h... |
439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 |
* flush_hold_queue - empty the hold queue if auditd appears * * If auditd just started, drain the queue of messages already * sent to syslog/printk. Remember loss here is ok. We already * called audit_log_lost() if it didn't go out normally. so the * race between the skb_dequeue and the next check for audit_pid * doesn't matter. * * If you ever find kauditd to be too slow we can get a perf win * by doing our own locking and keeping better track if there * are messages in this queue. I don't see the need now, but * in 5 years when I want to play with this again I'll see this * note and still have no friggin idea what i'm thinking today. */ static void flush_hold_queue(void) |
b7d112581 AUDIT: Send netli... |
454 455 |
{ struct sk_buff *skb; |
b551d1d98 audit: refactor h... |
456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 |
if (!audit_default || !audit_pid) return; skb = skb_dequeue(&audit_skb_hold_queue); if (likely(!skb)) return; while (skb && audit_pid) { kauditd_send_skb(skb); skb = skb_dequeue(&audit_skb_hold_queue); } /* * if auditd just disappeared but we * dequeued an skb we need to drop ref */ if (skb) consume_skb(skb); } |
97a41e261 [PATCH] kernel/: ... |
475 |
static int kauditd_thread(void *dummy) |
b7d112581 AUDIT: Send netli... |
476 |
{ |
831441862 Freezer: make ker... |
477 |
set_freezable(); |
4899b8b16 [PATCH] kauditd_t... |
478 |
while (!kthread_should_stop()) { |
3320c5133 audit: flatten ka... |
479 |
struct sk_buff *skb; |
3320c5133 audit: flatten ka... |
480 |
|
b551d1d98 audit: refactor h... |
481 |
flush_hold_queue(); |
f3d357b09 Audit: save audit... |
482 |
|
b7d112581 AUDIT: Send netli... |
483 |
skb = skb_dequeue(&audit_skb_queue); |
db8973194 audit: efficiency... |
484 |
|
b7d112581 AUDIT: Send netli... |
485 |
if (skb) { |
db8973194 audit: efficiency... |
486 487 |
if (skb_queue_len(&audit_skb_queue) <= audit_backlog_limit) wake_up(&audit_backlog_wait); |
f3d357b09 Audit: save audit... |
488 489 |
if (audit_pid) kauditd_send_skb(skb); |
038cbcf65 Audit: unify the ... |
490 491 |
else audit_printk_skb(skb); |
3320c5133 audit: flatten ka... |
492 493 |
continue; } |
b7d112581 AUDIT: Send netli... |
494 |
|
6b55fc63f audit, sched/wait... |
495 |
wait_event_freezable(kauditd_wait, skb_queue_len(&audit_skb_queue)); |
b7d112581 AUDIT: Send netli... |
496 |
} |
4899b8b16 [PATCH] kauditd_t... |
497 |
return 0; |
b7d112581 AUDIT: Send netli... |
498 |
} |
9044e6bca [PATCH] fix deadl... |
499 500 501 |
int audit_send_list(void *_dest) { struct audit_netlink_list *dest = _dest; |
9044e6bca [PATCH] fix deadl... |
502 |
struct sk_buff *skb; |
48095d991 audit: Use struct... |
503 |
struct net *net = dest->net; |
33faba7fa audit: listen in ... |
504 |
struct audit_net *aunet = net_generic(net, audit_net_id); |
9044e6bca [PATCH] fix deadl... |
505 506 |
/* wait for parent to finish and send an ACK */ |
f368c07d7 [PATCH] audit: pa... |
507 508 |
mutex_lock(&audit_cmd_mutex); mutex_unlock(&audit_cmd_mutex); |
9044e6bca [PATCH] fix deadl... |
509 510 |
while ((skb = __skb_dequeue(&dest->q)) != NULL) |
33faba7fa audit: listen in ... |
511 |
netlink_unicast(aunet->nlsk, skb, dest->portid, 0); |
9044e6bca [PATCH] fix deadl... |
512 |
|
48095d991 audit: Use struct... |
513 |
put_net(net); |
9044e6bca [PATCH] fix deadl... |
514 515 516 517 |
kfree(dest); return 0; } |
f9441639e audit: fix netlin... |
518 |
struct sk_buff *audit_make_reply(__u32 portid, int seq, int type, int done, |
b8800aa5d audit: make funct... |
519 |
int multi, const void *payload, int size) |
9044e6bca [PATCH] fix deadl... |
520 521 522 |
{ struct sk_buff *skb; struct nlmsghdr *nlh; |
9044e6bca [PATCH] fix deadl... |
523 524 525 |
void *data; int flags = multi ? NLM_F_MULTI : 0; int t = done ? NLMSG_DONE : type; |
ee080e6ce Audit: cleanup ne... |
526 |
skb = nlmsg_new(size, GFP_KERNEL); |
9044e6bca [PATCH] fix deadl... |
527 528 |
if (!skb) return NULL; |
f9441639e audit: fix netlin... |
529 |
nlh = nlmsg_put(skb, portid, seq, t, size, flags); |
c64e66c67 audit: netlink: M... |
530 531 532 |
if (!nlh) goto out_kfree_skb; data = nlmsg_data(nlh); |
9044e6bca [PATCH] fix deadl... |
533 534 |
memcpy(data, payload, size); return skb; |
c64e66c67 audit: netlink: M... |
535 536 |
out_kfree_skb: kfree_skb(skb); |
9044e6bca [PATCH] fix deadl... |
537 538 |
return NULL; } |
f09ac9db2 Audit: stop deadl... |
539 540 541 |
static int audit_send_reply_thread(void *arg) { struct audit_reply *reply = (struct audit_reply *)arg; |
48095d991 audit: Use struct... |
542 |
struct net *net = reply->net; |
33faba7fa audit: listen in ... |
543 |
struct audit_net *aunet = net_generic(net, audit_net_id); |
f09ac9db2 Audit: stop deadl... |
544 545 546 547 548 549 |
mutex_lock(&audit_cmd_mutex); mutex_unlock(&audit_cmd_mutex); /* Ignore failure. It'll only happen if the sender goes away, because our timeout is set to infinite. */ |
33faba7fa audit: listen in ... |
550 |
netlink_unicast(aunet->nlsk , reply->skb, reply->portid, 0); |
48095d991 audit: Use struct... |
551 |
put_net(net); |
f09ac9db2 Audit: stop deadl... |
552 553 554 |
kfree(reply); return 0; } |
b0dd25a82 [PATCH] AUDIT: ke... |
555 556 |
/** * audit_send_reply - send an audit reply message via netlink |
d211f177b audit: Update kdo... |
557 |
* @request_skb: skb of request we are replying to (used to target the reply) |
b0dd25a82 [PATCH] AUDIT: ke... |
558 559 560 561 562 563 564 |
* @seq: sequence number * @type: audit message type * @done: done (last) flag * @multi: multi-part message flag * @payload: payload data * @size: payload size * |
f9441639e audit: fix netlin... |
565 |
* Allocates an skb, builds the netlink message, and sends it to the port id. |
b0dd25a82 [PATCH] AUDIT: ke... |
566 567 |
* No failure notifications. */ |
6f285b19d audit: Send repli... |
568 |
static void audit_send_reply(struct sk_buff *request_skb, int seq, int type, int done, |
f9441639e audit: fix netlin... |
569 |
int multi, const void *payload, int size) |
1da177e4c Linux-2.6.12-rc2 |
570 |
{ |
6f285b19d audit: Send repli... |
571 572 |
u32 portid = NETLINK_CB(request_skb).portid; struct net *net = sock_net(NETLINK_CB(request_skb).sk); |
f09ac9db2 Audit: stop deadl... |
573 574 575 576 577 578 579 |
struct sk_buff *skb; struct task_struct *tsk; struct audit_reply *reply = kmalloc(sizeof(struct audit_reply), GFP_KERNEL); if (!reply) return; |
f9441639e audit: fix netlin... |
580 |
skb = audit_make_reply(portid, seq, type, done, multi, payload, size); |
1da177e4c Linux-2.6.12-rc2 |
581 |
if (!skb) |
fcaf1eb86 [patch 1/1] audit... |
582 |
goto out; |
f09ac9db2 Audit: stop deadl... |
583 |
|
6f285b19d audit: Send repli... |
584 |
reply->net = get_net(net); |
f9441639e audit: fix netlin... |
585 |
reply->portid = portid; |
f09ac9db2 Audit: stop deadl... |
586 587 588 |
reply->skb = skb; tsk = kthread_run(audit_send_reply_thread, reply, "audit_send_reply"); |
fcaf1eb86 [patch 1/1] audit... |
589 590 591 592 593 |
if (!IS_ERR(tsk)) return; kfree_skb(skb); out: kfree(reply); |
1da177e4c Linux-2.6.12-rc2 |
594 595 596 597 598 599 |
} /* * Check for appropriate CAP_AUDIT_ capabilities on incoming audit * control messages. */ |
c7bdb545d [NETLINK]: Encaps... |
600 |
static int audit_netlink_ok(struct sk_buff *skb, u16 msg_type) |
1da177e4c Linux-2.6.12-rc2 |
601 602 |
{ int err = 0; |
5a3cb3b6c audit: allow user... |
603 |
/* Only support initial user namespace for now. */ |
aa4af831b AUDIT: Allow logi... |
604 605 606 607 608 609 610 611 612 613 |
/* * We return ECONNREFUSED because it tricks userspace into thinking * that audit was not configured into the kernel. Lots of users * configure their PAM stack (because that's what the distro does) * to reject login if unable to send messages to audit. If we return * ECONNREFUSED the PAM stack thinks the kernel does not have audit * configured in and will let login proceed. If we return EPERM * userspace will reject all logins. This should be removed when we * support non init namespaces!! */ |
0b747172d Merge git://git.i... |
614 |
if (current_user_ns() != &init_user_ns) |
aa4af831b AUDIT: Allow logi... |
615 |
return -ECONNREFUSED; |
34e36d8ec audit: Limit audi... |
616 |
|
1da177e4c Linux-2.6.12-rc2 |
617 |
switch (msg_type) { |
1da177e4c Linux-2.6.12-rc2 |
618 |
case AUDIT_LIST: |
1da177e4c Linux-2.6.12-rc2 |
619 620 |
case AUDIT_ADD: case AUDIT_DEL: |
189009091 audit: remove the... |
621 622 623 |
return -EOPNOTSUPP; case AUDIT_GET: case AUDIT_SET: |
b0fed4021 audit: implement ... |
624 625 |
case AUDIT_GET_FEATURE: case AUDIT_SET_FEATURE: |
189009091 audit: remove the... |
626 627 |
case AUDIT_LIST_RULES: case AUDIT_ADD_RULE: |
93315ed6d [PATCH] audit str... |
628 |
case AUDIT_DEL_RULE: |
c2f0c7c35 The attached patc... |
629 |
case AUDIT_SIGNAL_INFO: |
522ed7767 Audit: add TTY in... |
630 631 |
case AUDIT_TTY_GET: case AUDIT_TTY_SET: |
74c3cbe33 [PATCH] audit: wa... |
632 633 |
case AUDIT_TRIM: case AUDIT_MAKE_EQUIV: |
5a3cb3b6c audit: allow user... |
634 635 636 637 |
/* Only support auditd and auditctl in initial pid namespace * for now. */ if ((task_active_pid_ns(current) != &init_pid_ns)) return -EPERM; |
90f62cf30 net: Use netlink_... |
638 |
if (!netlink_capable(skb, CAP_AUDIT_CONTROL)) |
1da177e4c Linux-2.6.12-rc2 |
639 640 |
err = -EPERM; break; |
05474106a AUDIT: Fix AVC_US... |
641 |
case AUDIT_USER: |
039b6b3ed audit: add spaces... |
642 643 |
case AUDIT_FIRST_USER_MSG ... AUDIT_LAST_USER_MSG: case AUDIT_FIRST_USER_MSG2 ... AUDIT_LAST_USER_MSG2: |
90f62cf30 net: Use netlink_... |
644 |
if (!netlink_capable(skb, CAP_AUDIT_WRITE)) |
1da177e4c Linux-2.6.12-rc2 |
645 646 647 648 649 650 651 652 |
err = -EPERM; break; default: /* bad msg */ err = -EINVAL; } return err; } |
dc9eb698f audit: stop pushi... |
653 |
static int audit_log_common_recv_msg(struct audit_buffer **ab, u16 msg_type) |
50397bd1e [AUDIT] clean up ... |
654 655 |
{ int rc = 0; |
dc9eb698f audit: stop pushi... |
656 |
uid_t uid = from_kuid(&init_user_ns, current_uid()); |
f1dc4867f audit: anchor all... |
657 |
pid_t pid = task_tgid_nr(current); |
50397bd1e [AUDIT] clean up ... |
658 |
|
0868a5e15 audit: printk USE... |
659 |
if (!audit_enabled && msg_type != AUDIT_USER_AVC) { |
50397bd1e [AUDIT] clean up ... |
660 661 662 663 664 |
*ab = NULL; return rc; } *ab = audit_log_start(NULL, GFP_KERNEL, msg_type); |
0644ec0cc audit: catch poss... |
665 666 |
if (unlikely(!*ab)) return rc; |
f1dc4867f audit: anchor all... |
667 |
audit_log_format(*ab, "pid=%d uid=%u", pid, uid); |
4d3fb709b helper for some s... |
668 |
audit_log_session_info(*ab); |
b122c3767 audit: use a cons... |
669 |
audit_log_task_context(*ab); |
50397bd1e [AUDIT] clean up ... |
670 671 672 |
return rc; } |
b0fed4021 audit: implement ... |
673 674 675 676 677 678 679 680 681 682 683 |
int is_audit_feature_set(int i) { return af.features & AUDIT_FEATURE_TO_MASK(i); } static int audit_get_feature(struct sk_buff *skb) { u32 seq; seq = nlmsg_hdr(skb)->nlmsg_seq; |
9ef915147 audit: correct AU... |
684 |
audit_send_reply(skb, seq, AUDIT_GET_FEATURE, 0, 0, &af, sizeof(af)); |
b0fed4021 audit: implement ... |
685 686 687 688 689 690 691 692 |
return 0; } static void audit_log_feature_change(int which, u32 old_feature, u32 new_feature, u32 old_lock, u32 new_lock, int res) { struct audit_buffer *ab; |
b6c50fe0b audit: don't gene... |
693 694 |
if (audit_enabled == AUDIT_OFF) return; |
b0fed4021 audit: implement ... |
695 |
ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_FEATURE_CHANGE); |
ad2ac2632 audit: log task i... |
696 |
audit_log_task_info(ab, current); |
897f1acbb audit: AUDIT_FEAT... |
697 |
audit_log_format(ab, " feature=%s old=%u new=%u old_lock=%u new_lock=%u res=%d", |
b0fed4021 audit: implement ... |
698 699 700 701 702 703 704 705 706 |
audit_feature_names[which], !!old_feature, !!new_feature, !!old_lock, !!new_lock, res); audit_log_end(ab); } static int audit_set_feature(struct sk_buff *skb) { struct audit_features *uaf; int i; |
6eed9b261 kernel/audit.c: u... |
707 |
BUILD_BUG_ON(AUDIT_LAST_FEATURE + 1 > ARRAY_SIZE(audit_feature_names)); |
b0fed4021 audit: implement ... |
708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 |
uaf = nlmsg_data(nlmsg_hdr(skb)); /* if there is ever a version 2 we should handle that here */ for (i = 0; i <= AUDIT_LAST_FEATURE; i++) { u32 feature = AUDIT_FEATURE_TO_MASK(i); u32 old_feature, new_feature, old_lock, new_lock; /* if we are not changing this feature, move along */ if (!(feature & uaf->mask)) continue; old_feature = af.features & feature; new_feature = uaf->features & feature; new_lock = (uaf->lock | af.lock) & feature; old_lock = af.lock & feature; /* are we changing a locked feature? */ |
4547b3bc4 audit: use old_lo... |
726 |
if (old_lock && (new_feature != old_feature)) { |
b0fed4021 audit: implement ... |
727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 |
audit_log_feature_change(i, old_feature, new_feature, old_lock, new_lock, 0); return -EPERM; } } /* nothing invalid, do the changes */ for (i = 0; i <= AUDIT_LAST_FEATURE; i++) { u32 feature = AUDIT_FEATURE_TO_MASK(i); u32 old_feature, new_feature, old_lock, new_lock; /* if we are not changing this feature, move along */ if (!(feature & uaf->mask)) continue; old_feature = af.features & feature; new_feature = uaf->features & feature; old_lock = af.lock & feature; new_lock = (uaf->lock | af.lock) & feature; if (new_feature != old_feature) audit_log_feature_change(i, old_feature, new_feature, old_lock, new_lock, 1); if (new_feature) af.features |= feature; else af.features &= ~feature; af.lock |= new_lock; } return 0; } |
1da177e4c Linux-2.6.12-rc2 |
759 760 |
static int audit_receive_msg(struct sk_buff *skb, struct nlmsghdr *nlh) { |
dc9eb698f audit: stop pushi... |
761 |
u32 seq; |
1da177e4c Linux-2.6.12-rc2 |
762 |
void *data; |
1da177e4c Linux-2.6.12-rc2 |
763 |
int err; |
c04049939 AUDIT: Add messag... |
764 |
struct audit_buffer *ab; |
1da177e4c Linux-2.6.12-rc2 |
765 |
u16 msg_type = nlh->nlmsg_type; |
e1396065e [PATCH] collect s... |
766 |
struct audit_sig_info *sig_data; |
50397bd1e [AUDIT] clean up ... |
767 |
char *ctx = NULL; |
e1396065e [PATCH] collect s... |
768 |
u32 len; |
1da177e4c Linux-2.6.12-rc2 |
769 |
|
c7bdb545d [NETLINK]: Encaps... |
770 |
err = audit_netlink_ok(skb, msg_type); |
1da177e4c Linux-2.6.12-rc2 |
771 772 |
if (err) return err; |
b0dd25a82 [PATCH] AUDIT: ke... |
773 774 |
/* As soon as there's any sign of userspace auditd, * start kauditd to talk to it */ |
13f51e1c3 audit: don't chec... |
775 |
if (!kauditd_task) { |
b7d112581 AUDIT: Send netli... |
776 |
kauditd_task = kthread_run(kauditd_thread, NULL, "kauditd"); |
13f51e1c3 audit: don't chec... |
777 778 779 780 781 |
if (IS_ERR(kauditd_task)) { err = PTR_ERR(kauditd_task); kauditd_task = NULL; return err; } |
b7d112581 AUDIT: Send netli... |
782 |
} |
1da177e4c Linux-2.6.12-rc2 |
783 |
seq = nlh->nlmsg_seq; |
c64e66c67 audit: netlink: M... |
784 |
data = nlmsg_data(nlh); |
1da177e4c Linux-2.6.12-rc2 |
785 786 |
switch (msg_type) { |
09f883a90 audit: clean up A... |
787 788 789 790 791 792 793 794 795 796 |
case AUDIT_GET: { struct audit_status s; memset(&s, 0, sizeof(s)); s.enabled = audit_enabled; s.failure = audit_failure; s.pid = audit_pid; s.rate_limit = audit_rate_limit; s.backlog_limit = audit_backlog_limit; s.lost = atomic_read(&audit_lost); s.backlog = skb_queue_len(&audit_skb_queue); |
0288d7183 audit: convert st... |
797 |
s.feature_bitmap = AUDIT_FEATURE_BITMAP_ALL; |
51cc83f02 audit: add audit_... |
798 |
s.backlog_wait_time = audit_backlog_wait_time; |
6f285b19d audit: Send repli... |
799 |
audit_send_reply(skb, seq, AUDIT_GET, 0, 0, &s, sizeof(s)); |
1da177e4c Linux-2.6.12-rc2 |
800 |
break; |
09f883a90 audit: clean up A... |
801 802 803 804 805 806 807 808 |
} case AUDIT_SET: { struct audit_status s; memset(&s, 0, sizeof(s)); /* guard against past and future API changes */ memcpy(&s, data, min_t(size_t, sizeof(s), nlmsg_len(nlh))); if (s.mask & AUDIT_STATUS_ENABLED) { err = audit_set_enabled(s.enabled); |
20c6aaa39 [PATCH] Fix the b... |
809 810 |
if (err < 0) return err; |
1da177e4c Linux-2.6.12-rc2 |
811 |
} |
09f883a90 audit: clean up A... |
812 813 |
if (s.mask & AUDIT_STATUS_FAILURE) { err = audit_set_failure(s.failure); |
20c6aaa39 [PATCH] Fix the b... |
814 815 |
if (err < 0) return err; |
1da177e4c Linux-2.6.12-rc2 |
816 |
} |
09f883a90 audit: clean up A... |
817 818 |
if (s.mask & AUDIT_STATUS_PID) { int new_pid = s.pid; |
1a6b9f231 [AUDIT] make audi... |
819 |
|
34eab0a7c audit: prevent an... |
820 821 |
if ((!new_pid) && (task_tgid_vnr(current) != audit_pid)) return -EACCES; |
1a6b9f231 [AUDIT] make audi... |
822 |
if (audit_enabled != AUDIT_OFF) |
dc9eb698f audit: stop pushi... |
823 |
audit_log_config_change("audit_pid", new_pid, audit_pid, 1); |
1a6b9f231 [AUDIT] make audi... |
824 |
audit_pid = new_pid; |
15e473046 netlink: Rename p... |
825 |
audit_nlk_portid = NETLINK_CB(skb).portid; |
de92fc97e audit: fix incorr... |
826 |
audit_sock = skb->sk; |
1da177e4c Linux-2.6.12-rc2 |
827 |
} |
09f883a90 audit: clean up A... |
828 829 |
if (s.mask & AUDIT_STATUS_RATE_LIMIT) { err = audit_set_rate_limit(s.rate_limit); |
20c6aaa39 [PATCH] Fix the b... |
830 831 832 |
if (err < 0) return err; } |
51cc83f02 audit: add audit_... |
833 |
if (s.mask & AUDIT_STATUS_BACKLOG_LIMIT) { |
09f883a90 audit: clean up A... |
834 |
err = audit_set_backlog_limit(s.backlog_limit); |
51cc83f02 audit: add audit_... |
835 836 837 |
if (err < 0) return err; } |
3f0c5fad8 audit: remove nee... |
838 839 840 841 842 843 844 845 846 |
if (s.mask & AUDIT_STATUS_BACKLOG_WAIT_TIME) { if (sizeof(s) > (size_t)nlh->nlmsg_len) return -EINVAL; if (s.backlog_wait_time < 0 || s.backlog_wait_time > 10*AUDIT_BACKLOG_WAIT_TIME) return -EINVAL; err = audit_set_backlog_wait_time(s.backlog_wait_time); if (err < 0) return err; |
51cc83f02 audit: add audit_... |
847 |
} |
1da177e4c Linux-2.6.12-rc2 |
848 |
break; |
09f883a90 audit: clean up A... |
849 |
} |
b0fed4021 audit: implement ... |
850 851 852 853 854 855 856 857 858 859 |
case AUDIT_GET_FEATURE: err = audit_get_feature(skb); if (err) return err; break; case AUDIT_SET_FEATURE: err = audit_set_feature(skb); if (err) return err; break; |
05474106a AUDIT: Fix AVC_US... |
860 |
case AUDIT_USER: |
039b6b3ed audit: add spaces... |
861 862 |
case AUDIT_FIRST_USER_MSG ... AUDIT_LAST_USER_MSG: case AUDIT_FIRST_USER_MSG2 ... AUDIT_LAST_USER_MSG2: |
4a4cd633b AUDIT: Optimise t... |
863 864 |
if (!audit_enabled && msg_type != AUDIT_USER_AVC) return 0; |
62062cf8a audit: allow chec... |
865 |
err = audit_filter_user(msg_type); |
724e4fcc8 audit: log on err... |
866 |
if (err == 1) { /* match or error */ |
4a4cd633b AUDIT: Optimise t... |
867 |
err = 0; |
522ed7767 Audit: add TTY in... |
868 |
if (msg_type == AUDIT_USER_TTY) { |
152f497b9 audit: push login... |
869 |
err = tty_audit_push_current(); |
522ed7767 Audit: add TTY in... |
870 871 872 |
if (err) break; } |
1b7b533f6 audit: drop audit... |
873 |
mutex_unlock(&audit_cmd_mutex); |
dc9eb698f audit: stop pushi... |
874 |
audit_log_common_recv_msg(&ab, msg_type); |
50397bd1e [AUDIT] clean up ... |
875 |
if (msg_type != AUDIT_USER_TTY) |
b50eba7e2 audit: format use... |
876 877 |
audit_log_format(ab, " msg='%.*s'", AUDIT_MESSAGE_TEXT_MAX, |
50397bd1e [AUDIT] clean up ... |
878 879 880 |
(char *)data); else { int size; |
f7616102d audit: use data= ... |
881 |
audit_log_format(ab, " data="); |
50397bd1e [AUDIT] clean up ... |
882 |
size = nlmsg_len(nlh); |
55ad2f8d3 audit: ignore ter... |
883 884 885 |
if (size > 0 && ((unsigned char *)data)[size - 1] == '\0') size--; |
b556f8ad5 Audit: standardiz... |
886 |
audit_log_n_untrustedstring(ab, data, size); |
4a4cd633b AUDIT: Optimise t... |
887 |
} |
f9441639e audit: fix netlin... |
888 |
audit_set_portid(ab, NETLINK_CB(skb).portid); |
50397bd1e [AUDIT] clean up ... |
889 |
audit_log_end(ab); |
1b7b533f6 audit: drop audit... |
890 |
mutex_lock(&audit_cmd_mutex); |
0f45aa18e AUDIT: Allow filt... |
891 |
} |
1da177e4c Linux-2.6.12-rc2 |
892 |
break; |
93315ed6d [PATCH] audit str... |
893 894 895 896 |
case AUDIT_ADD_RULE: case AUDIT_DEL_RULE: if (nlmsg_len(nlh) < sizeof(struct audit_rule_data)) return -EINVAL; |
1a6b9f231 [AUDIT] make audi... |
897 |
if (audit_enabled == AUDIT_LOCKED) { |
dc9eb698f audit: stop pushi... |
898 899 |
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE); audit_log_format(ab, " audit_enabled=%d res=0", audit_enabled); |
50397bd1e [AUDIT] clean up ... |
900 |
audit_log_end(ab); |
6a01b07fa [PATCH] audit con... |
901 902 |
return -EPERM; } |
ce0d9f046 audit: refactor a... |
903 |
err = audit_rule_change(msg_type, NETLINK_CB(skb).portid, |
dc9eb698f audit: stop pushi... |
904 |
seq, data, nlmsg_len(nlh)); |
1da177e4c Linux-2.6.12-rc2 |
905 |
break; |
ce0d9f046 audit: refactor a... |
906 |
case AUDIT_LIST_RULES: |
6f285b19d audit: Send repli... |
907 |
err = audit_list_rules_send(skb, seq); |
ce0d9f046 audit: refactor a... |
908 |
break; |
74c3cbe33 [PATCH] audit: wa... |
909 910 |
case AUDIT_TRIM: audit_trim_trees(); |
dc9eb698f audit: stop pushi... |
911 |
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE); |
74c3cbe33 [PATCH] audit: wa... |
912 913 914 915 916 917 |
audit_log_format(ab, " op=trim res=1"); audit_log_end(ab); break; case AUDIT_MAKE_EQUIV: { void *bufp = data; u32 sizes[2]; |
7719e437f [PATCH 2/2] audit... |
918 |
size_t msglen = nlmsg_len(nlh); |
74c3cbe33 [PATCH] audit: wa... |
919 920 921 |
char *old, *new; err = -EINVAL; |
7719e437f [PATCH 2/2] audit... |
922 |
if (msglen < 2 * sizeof(u32)) |
74c3cbe33 [PATCH] audit: wa... |
923 924 925 |
break; memcpy(sizes, bufp, 2 * sizeof(u32)); bufp += 2 * sizeof(u32); |
7719e437f [PATCH 2/2] audit... |
926 927 |
msglen -= 2 * sizeof(u32); old = audit_unpack_string(&bufp, &msglen, sizes[0]); |
74c3cbe33 [PATCH] audit: wa... |
928 929 930 931 |
if (IS_ERR(old)) { err = PTR_ERR(old); break; } |
7719e437f [PATCH 2/2] audit... |
932 |
new = audit_unpack_string(&bufp, &msglen, sizes[1]); |
74c3cbe33 [PATCH] audit: wa... |
933 934 935 936 937 938 939 |
if (IS_ERR(new)) { err = PTR_ERR(new); kfree(old); break; } /* OK, here comes... */ err = audit_tag_tree(old, new); |
dc9eb698f audit: stop pushi... |
940 |
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE); |
50397bd1e [AUDIT] clean up ... |
941 |
|
74c3cbe33 [PATCH] audit: wa... |
942 943 944 945 946 947 948 949 950 951 |
audit_log_format(ab, " op=make_equiv old="); audit_log_untrustedstring(ab, old); audit_log_format(ab, " new="); audit_log_untrustedstring(ab, new); audit_log_format(ab, " res=%d", !err); audit_log_end(ab); kfree(old); kfree(new); break; } |
c2f0c7c35 The attached patc... |
952 |
case AUDIT_SIGNAL_INFO: |
939cbf260 Audit: send signa... |
953 954 955 956 957 958 |
len = 0; if (audit_sig_sid) { err = security_secid_to_secctx(audit_sig_sid, &ctx, &len); if (err) return err; } |
e1396065e [PATCH] collect s... |
959 960 |
sig_data = kmalloc(sizeof(*sig_data) + len, GFP_KERNEL); if (!sig_data) { |
939cbf260 Audit: send signa... |
961 962 |
if (audit_sig_sid) security_release_secctx(ctx, len); |
e1396065e [PATCH] collect s... |
963 964 |
return -ENOMEM; } |
cca080d9b userns: Convert a... |
965 |
sig_data->uid = from_kuid(&init_user_ns, audit_sig_uid); |
e1396065e [PATCH] collect s... |
966 |
sig_data->pid = audit_sig_pid; |
939cbf260 Audit: send signa... |
967 968 969 970 |
if (audit_sig_sid) { memcpy(sig_data->ctx, ctx, len); security_release_secctx(ctx, len); } |
6f285b19d audit: Send repli... |
971 972 |
audit_send_reply(skb, seq, AUDIT_SIGNAL_INFO, 0, 0, sig_data, sizeof(*sig_data) + len); |
e1396065e [PATCH] collect s... |
973 |
kfree(sig_data); |
c2f0c7c35 The attached patc... |
974 |
break; |
522ed7767 Audit: add TTY in... |
975 976 |
case AUDIT_TTY_GET: { struct audit_tty_status s; |
8aa14b649 audit: Simply AUD... |
977 |
struct task_struct *tsk = current; |
7173c54e3 audit: use spin_l... |
978 |
spin_lock(&tsk->sighand->siglock); |
b95d77fe3 audit: use given ... |
979 |
s.enabled = tsk->signal->audit_tty; |
46e959ea2 audit: add an opt... |
980 |
s.log_passwd = tsk->signal->audit_tty_log_passwd; |
7173c54e3 audit: use spin_l... |
981 |
spin_unlock(&tsk->sighand->siglock); |
8aa14b649 audit: Simply AUD... |
982 |
|
6f285b19d audit: Send repli... |
983 |
audit_send_reply(skb, seq, AUDIT_TTY_GET, 0, 0, &s, sizeof(s)); |
522ed7767 Audit: add TTY in... |
984 985 986 |
break; } case AUDIT_TTY_SET: { |
a06e56b2a audit: log AUDIT_... |
987 |
struct audit_tty_status s, old; |
8aa14b649 audit: Simply AUD... |
988 |
struct task_struct *tsk = current; |
a06e56b2a audit: log AUDIT_... |
989 |
struct audit_buffer *ab; |
0e23bacca audit: rework AUD... |
990 991 992 993 994 995 996 997 |
memset(&s, 0, sizeof(s)); /* guard against past and future API changes */ memcpy(&s, data, min_t(size_t, sizeof(s), nlmsg_len(nlh))); /* check if new data is valid */ if ((s.enabled != 0 && s.enabled != 1) || (s.log_passwd != 0 && s.log_passwd != 1)) err = -EINVAL; |
a06e56b2a audit: log AUDIT_... |
998 999 1000 1001 |
spin_lock(&tsk->sighand->siglock); old.enabled = tsk->signal->audit_tty; old.log_passwd = tsk->signal->audit_tty_log_passwd; |
0e23bacca audit: rework AUD... |
1002 1003 1004 1005 |
if (!err) { tsk->signal->audit_tty = s.enabled; tsk->signal->audit_tty_log_passwd = s.log_passwd; } |
a06e56b2a audit: log AUDIT_... |
1006 |
spin_unlock(&tsk->sighand->siglock); |
522ed7767 Audit: add TTY in... |
1007 |
|
a06e56b2a audit: log AUDIT_... |
1008 |
audit_log_common_recv_msg(&ab, AUDIT_CONFIG_CHANGE); |
1ce319f11 audit: reorder AU... |
1009 1010 1011 1012 |
audit_log_format(ab, " op=tty_set old-enabled=%d new-enabled=%d" " old-log_passwd=%d new-log_passwd=%d res=%d", old.enabled, s.enabled, old.log_passwd, s.log_passwd, !err); |
a06e56b2a audit: log AUDIT_... |
1013 |
audit_log_end(ab); |
522ed7767 Audit: add TTY in... |
1014 1015 |
break; } |
1da177e4c Linux-2.6.12-rc2 |
1016 1017 1018 1019 1020 1021 1022 |
default: err = -EINVAL; break; } return err < 0 ? err : 0; } |
b0dd25a82 [PATCH] AUDIT: ke... |
1023 |
/* |
ea7ae60bf Audit: clean up a... |
1024 1025 |
* Get message from skb. Each message is processed by audit_receive_msg. * Malformed skbs with wrong length are discarded silently. |
b0dd25a82 [PATCH] AUDIT: ke... |
1026 |
*/ |
2a0a6ebee [NETLINK]: Synchr... |
1027 |
static void audit_receive_skb(struct sk_buff *skb) |
1da177e4c Linux-2.6.12-rc2 |
1028 |
{ |
ea7ae60bf Audit: clean up a... |
1029 1030 |
struct nlmsghdr *nlh; /* |
941912133 audit: replace ob... |
1031 |
* len MUST be signed for nlmsg_next to be able to dec it below 0 |
ea7ae60bf Audit: clean up a... |
1032 1033 1034 1035 1036 1037 1038 |
* if the nlmsg_len was not aligned */ int len; int err; nlh = nlmsg_hdr(skb); len = skb->len; |
941912133 audit: replace ob... |
1039 |
while (nlmsg_ok(nlh, len)) { |
ea7ae60bf Audit: clean up a... |
1040 1041 1042 |
err = audit_receive_msg(skb, nlh); /* if err or if this message says it wants a response */ if (err || (nlh->nlmsg_flags & NLM_F_ACK)) |
1da177e4c Linux-2.6.12-rc2 |
1043 |
netlink_ack(skb, nlh, err); |
ea7ae60bf Audit: clean up a... |
1044 |
|
2851da570 audit: pass int* ... |
1045 |
nlh = nlmsg_next(nlh, &len); |
1da177e4c Linux-2.6.12-rc2 |
1046 |
} |
1da177e4c Linux-2.6.12-rc2 |
1047 1048 1049 |
} /* Receive messages from netlink socket. */ |
cd40b7d39 [NET]: make netli... |
1050 |
static void audit_receive(struct sk_buff *skb) |
1da177e4c Linux-2.6.12-rc2 |
1051 |
{ |
f368c07d7 [PATCH] audit: pa... |
1052 |
mutex_lock(&audit_cmd_mutex); |
cd40b7d39 [NET]: make netli... |
1053 |
audit_receive_skb(skb); |
f368c07d7 [PATCH] audit: pa... |
1054 |
mutex_unlock(&audit_cmd_mutex); |
1da177e4c Linux-2.6.12-rc2 |
1055 |
} |
3a101b8de audit: add netlin... |
1056 |
/* Run custom bind function on netlink socket group connect or bind requests. */ |
023e2cfa3 netlink/genetlink... |
1057 |
static int audit_bind(struct net *net, int group) |
3a101b8de audit: add netlin... |
1058 1059 1060 1061 1062 1063 |
{ if (!capable(CAP_AUDIT_READ)) return -EPERM; return 0; } |
33faba7fa audit: listen in ... |
1064 |
static int __net_init audit_net_init(struct net *net) |
1da177e4c Linux-2.6.12-rc2 |
1065 |
{ |
a31f2d17b netlink: add netl... |
1066 1067 |
struct netlink_kernel_cfg cfg = { .input = audit_receive, |
3a101b8de audit: add netlin... |
1068 |
.bind = audit_bind, |
451f92163 audit: add netlin... |
1069 1070 |
.flags = NL_CFG_F_NONROOT_RECV, .groups = AUDIT_NLGRP_MAX, |
a31f2d17b netlink: add netl... |
1071 |
}; |
f368c07d7 [PATCH] audit: pa... |
1072 |
|
33faba7fa audit: listen in ... |
1073 |
struct audit_net *aunet = net_generic(net, audit_net_id); |
33faba7fa audit: listen in ... |
1074 |
aunet->nlsk = netlink_kernel_create(net, NETLINK_AUDIT, &cfg); |
11ee39ebf audit: print erro... |
1075 |
if (aunet->nlsk == NULL) { |
33faba7fa audit: listen in ... |
1076 |
audit_panic("cannot initialize netlink socket in namespace"); |
11ee39ebf audit: print erro... |
1077 1078 1079 |
return -ENOMEM; } aunet->nlsk->sk_sndtimeo = MAX_SCHEDULE_TIMEOUT; |
33faba7fa audit: listen in ... |
1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 |
return 0; } static void __net_exit audit_net_exit(struct net *net) { struct audit_net *aunet = net_generic(net, audit_net_id); struct sock *sock = aunet->nlsk; if (sock == audit_sock) { audit_pid = 0; audit_sock = NULL; } |
e231d54c1 kernel: Use RCU_I... |
1091 |
RCU_INIT_POINTER(aunet->nlsk, NULL); |
33faba7fa audit: listen in ... |
1092 1093 1094 |
synchronize_net(); netlink_kernel_release(sock); } |
8626877b5 audit: fix locati... |
1095 |
static struct pernet_operations audit_net_ops __net_initdata = { |
33faba7fa audit: listen in ... |
1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 |
.init = audit_net_init, .exit = audit_net_exit, .id = &audit_net_id, .size = sizeof(struct audit_net), }; /* Initialize audit support at boot time. */ static int __init audit_init(void) { int i; |
a3f07114e [PATCH] Audit: ma... |
1106 1107 |
if (audit_initialized == AUDIT_DISABLED) return 0; |
d957f7b72 audit: Use more c... |
1108 1109 1110 |
pr_info("initializing netlink subsys (%s) ", audit_default ? "enabled" : "disabled"); |
33faba7fa audit: listen in ... |
1111 |
register_pernet_subsys(&audit_net_ops); |
1da177e4c Linux-2.6.12-rc2 |
1112 |
|
b7d112581 AUDIT: Send netli... |
1113 |
skb_queue_head_init(&audit_skb_queue); |
f3d357b09 Audit: save audit... |
1114 |
skb_queue_head_init(&audit_skb_hold_queue); |
a3f07114e [PATCH] Audit: ma... |
1115 |
audit_initialized = AUDIT_INITIALIZED; |
1da177e4c Linux-2.6.12-rc2 |
1116 |
audit_enabled = audit_default; |
b593d384e [AUDIT] create co... |
1117 |
audit_ever_enabled |= !!audit_default; |
3dc7e3153 [PATCH] support f... |
1118 |
|
9ad9ad385 AUDIT: Wait for b... |
1119 |
audit_log(NULL, GFP_KERNEL, AUDIT_KERNEL, "initialized"); |
f368c07d7 [PATCH] audit: pa... |
1120 |
|
f368c07d7 [PATCH] audit: pa... |
1121 1122 |
for (i = 0; i < AUDIT_INODE_BUCKETS; i++) INIT_LIST_HEAD(&audit_inode_hash[i]); |
f368c07d7 [PATCH] audit: pa... |
1123 |
|
1da177e4c Linux-2.6.12-rc2 |
1124 1125 |
return 0; } |
1da177e4c Linux-2.6.12-rc2 |
1126 1127 1128 1129 1130 1131 |
__initcall(audit_init); /* Process kernel command-line parameter at boot time. audit=0 or audit=1. */ static int __init audit_enable(char *str) { audit_default = !!simple_strtol(str, NULL, 0); |
a3f07114e [PATCH] Audit: ma... |
1132 1133 |
if (!audit_default) audit_initialized = AUDIT_DISABLED; |
d957f7b72 audit: Use more c... |
1134 1135 |
pr_info("%s ", audit_default ? |
d3ca0344b audit: remove use... |
1136 |
"enabled (after initialization)" : "disabled (until reboot)"); |
a3f07114e [PATCH] Audit: ma... |
1137 |
|
9b41046cd [PATCH] Don't pas... |
1138 |
return 1; |
1da177e4c Linux-2.6.12-rc2 |
1139 |
} |
1da177e4c Linux-2.6.12-rc2 |
1140 |
__setup("audit=", audit_enable); |
f910fde73 audit: add kernel... |
1141 1142 1143 1144 |
/* Process kernel command-line parameter at boot time. * audit_backlog_limit=<n> */ static int __init audit_backlog_limit_set(char *str) { |
3e1d0bb62 audit: Convert in... |
1145 |
u32 audit_backlog_limit_arg; |
d957f7b72 audit: Use more c... |
1146 |
|
f910fde73 audit: add kernel... |
1147 |
pr_info("audit_backlog_limit: "); |
3e1d0bb62 audit: Convert in... |
1148 1149 1150 |
if (kstrtouint(str, 0, &audit_backlog_limit_arg)) { pr_cont("using default of %u, unable to parse %s ", |
d957f7b72 audit: Use more c... |
1151 |
audit_backlog_limit, str); |
f910fde73 audit: add kernel... |
1152 1153 |
return 1; } |
3e1d0bb62 audit: Convert in... |
1154 1155 |
audit_backlog_limit = audit_backlog_limit_arg; |
d957f7b72 audit: Use more c... |
1156 1157 |
pr_cont("%d ", audit_backlog_limit); |
f910fde73 audit: add kernel... |
1158 1159 1160 1161 |
return 1; } __setup("audit_backlog_limit=", audit_backlog_limit_set); |
16e1904e6 AUDIT: Add helper... |
1162 1163 1164 |
static void audit_buffer_free(struct audit_buffer *ab) { unsigned long flags; |
8fc6115c2 AUDIT: expand aud... |
1165 1166 |
if (!ab) return; |
5ac52f33b AUDIT: buffer aud... |
1167 1168 |
if (ab->skb) kfree_skb(ab->skb); |
b7d112581 AUDIT: Send netli... |
1169 |
|
16e1904e6 AUDIT: Add helper... |
1170 |
spin_lock_irqsave(&audit_freelist_lock, flags); |
5d136a010 [PATCH] minor aud... |
1171 |
if (audit_freelist_count > AUDIT_MAXFREE) |
16e1904e6 AUDIT: Add helper... |
1172 |
kfree(ab); |
5d136a010 [PATCH] minor aud... |
1173 1174 |
else { audit_freelist_count++; |
16e1904e6 AUDIT: Add helper... |
1175 |
list_add(&ab->list, &audit_freelist); |
5d136a010 [PATCH] minor aud... |
1176 |
} |
16e1904e6 AUDIT: Add helper... |
1177 1178 |
spin_unlock_irqrestore(&audit_freelist_lock, flags); } |
c04049939 AUDIT: Add messag... |
1179 |
static struct audit_buffer * audit_buffer_alloc(struct audit_context *ctx, |
dd0fc66fb [PATCH] gfp flags... |
1180 |
gfp_t gfp_mask, int type) |
16e1904e6 AUDIT: Add helper... |
1181 1182 1183 |
{ unsigned long flags; struct audit_buffer *ab = NULL; |
c04049939 AUDIT: Add messag... |
1184 |
struct nlmsghdr *nlh; |
16e1904e6 AUDIT: Add helper... |
1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 |
spin_lock_irqsave(&audit_freelist_lock, flags); if (!list_empty(&audit_freelist)) { ab = list_entry(audit_freelist.next, struct audit_buffer, list); list_del(&ab->list); --audit_freelist_count; } spin_unlock_irqrestore(&audit_freelist_lock, flags); if (!ab) { |
4332bdd33 AUDIT: Honour gfp... |
1196 |
ab = kmalloc(sizeof(*ab), gfp_mask); |
16e1904e6 AUDIT: Add helper... |
1197 |
if (!ab) |
8fc6115c2 AUDIT: expand aud... |
1198 |
goto err; |
16e1904e6 AUDIT: Add helper... |
1199 |
} |
8fc6115c2 AUDIT: expand aud... |
1200 |
|
b7d112581 AUDIT: Send netli... |
1201 |
ab->ctx = ctx; |
9ad9ad385 AUDIT: Wait for b... |
1202 |
ab->gfp_mask = gfp_mask; |
ee080e6ce Audit: cleanup ne... |
1203 1204 1205 |
ab->skb = nlmsg_new(AUDIT_BUFSIZ, gfp_mask); if (!ab->skb) |
c64e66c67 audit: netlink: M... |
1206 |
goto err; |
ee080e6ce Audit: cleanup ne... |
1207 |
|
c64e66c67 audit: netlink: M... |
1208 1209 1210 |
nlh = nlmsg_put(ab->skb, 0, 0, type, 0, 0); if (!nlh) goto out_kfree_skb; |
ee080e6ce Audit: cleanup ne... |
1211 |
|
16e1904e6 AUDIT: Add helper... |
1212 |
return ab; |
ee080e6ce Audit: cleanup ne... |
1213 |
|
c64e66c67 audit: netlink: M... |
1214 |
out_kfree_skb: |
ee080e6ce Audit: cleanup ne... |
1215 1216 |
kfree_skb(ab->skb); ab->skb = NULL; |
8fc6115c2 AUDIT: expand aud... |
1217 1218 1219 |
err: audit_buffer_free(ab); return NULL; |
16e1904e6 AUDIT: Add helper... |
1220 |
} |
1da177e4c Linux-2.6.12-rc2 |
1221 |
|
b0dd25a82 [PATCH] AUDIT: ke... |
1222 1223 1224 1225 |
/** * audit_serial - compute a serial number for the audit record * * Compute a serial number for the audit record. Audit records are |
bfb4496e7 AUDIT: Assign ser... |
1226 1227 1228 1229 1230 1231 1232 |
* written to user-space as soon as they are generated, so a complete * audit record may be written in several pieces. The timestamp of the * record and this serial number are used by the user-space tools to * determine which pieces belong to the same audit record. The * (timestamp,serial) tuple is unique for each syscall and is live from * syscall entry to syscall exit. * |
bfb4496e7 AUDIT: Assign ser... |
1233 1234 1235 1236 |
* NOTE: Another possibility is to store the formatted records off the * audit context (for those records that have a context), and emit them * all at syscall exit. However, this could delay the reporting of * significant errors until syscall exit (or never, if the system |
b0dd25a82 [PATCH] AUDIT: ke... |
1237 1238 |
* halts). */ |
bfb4496e7 AUDIT: Assign ser... |
1239 1240 |
unsigned int audit_serial(void) { |
01478d7d6 audit: use atomic... |
1241 |
static atomic_t serial = ATOMIC_INIT(0); |
d5b454f2c AUDIT: Fix livelo... |
1242 |
|
01478d7d6 audit: use atomic... |
1243 |
return atomic_add_return(1, &serial); |
bfb4496e7 AUDIT: Assign ser... |
1244 |
} |
5600b8927 whitespace fixes:... |
1245 |
static inline void audit_get_stamp(struct audit_context *ctx, |
bfb4496e7 AUDIT: Assign ser... |
1246 1247 |
struct timespec *t, unsigned int *serial) { |
48887e63d [PATCH] fix broke... |
1248 |
if (!ctx || !auditsc_get_stamp(ctx, t, serial)) { |
bfb4496e7 AUDIT: Assign ser... |
1249 1250 1251 1252 |
*t = CURRENT_TIME; *serial = audit_serial(); } } |
829199197 kernel/audit.c: a... |
1253 1254 1255 |
/* * Wait for auditd to drain the queue a little */ |
c81825dd6 audit: wait_for_a... |
1256 |
static long wait_for_auditd(long sleep_time) |
829199197 kernel/audit.c: a... |
1257 1258 |
{ DECLARE_WAITQUEUE(wait, current); |
f000cfdde audit: wait_for_a... |
1259 |
set_current_state(TASK_UNINTERRUPTIBLE); |
7ecf69bf5 audit: efficiency... |
1260 |
add_wait_queue_exclusive(&audit_backlog_wait, &wait); |
829199197 kernel/audit.c: a... |
1261 1262 1263 |
if (audit_backlog_limit && skb_queue_len(&audit_skb_queue) > audit_backlog_limit) |
c81825dd6 audit: wait_for_a... |
1264 |
sleep_time = schedule_timeout(sleep_time); |
829199197 kernel/audit.c: a... |
1265 1266 1267 |
__set_current_state(TASK_RUNNING); remove_wait_queue(&audit_backlog_wait, &wait); |
ae887e0bd audit: make use o... |
1268 |
|
c81825dd6 audit: wait_for_a... |
1269 |
return sleep_time; |
829199197 kernel/audit.c: a... |
1270 |
} |
b0dd25a82 [PATCH] AUDIT: ke... |
1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 |
/** * audit_log_start - obtain an audit buffer * @ctx: audit_context (may be NULL) * @gfp_mask: type of allocation * @type: audit message type * * Returns audit_buffer pointer on success or NULL on error. * * Obtain an audit buffer. This routine does locking to obtain the * audit buffer, but then no locking is required for calls to * audit_log_*format. If the task (ctx) is a task that is currently in a * syscall, then the syscall is marked as auditable and an audit record * will be written at syscall exit. If there is no associated task, then * task context (ctx) should be NULL. */ |
9796fdd82 [PATCH] gfp_t: ke... |
1286 |
struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, |
9ad9ad385 AUDIT: Wait for b... |
1287 |
int type) |
1da177e4c Linux-2.6.12-rc2 |
1288 1289 |
{ struct audit_buffer *ab = NULL; |
1da177e4c Linux-2.6.12-rc2 |
1290 |
struct timespec t; |
ef00be055 [patch 1/2] kerne... |
1291 |
unsigned int uninitialized_var(serial); |
6dd80aba9 audit: audit_log_... |
1292 1293 |
int reserve = 5; /* Allow atomic callers to go up to five entries over the normal backlog limit */ |
ac4cec443 AUDIT: Stop waiti... |
1294 |
unsigned long timeout_start = jiffies; |
1da177e4c Linux-2.6.12-rc2 |
1295 |
|
a3f07114e [PATCH] Audit: ma... |
1296 |
if (audit_initialized != AUDIT_INITIALIZED) |
1da177e4c Linux-2.6.12-rc2 |
1297 |
return NULL; |
c8edc80c8 [PATCH] Exclude m... |
1298 1299 |
if (unlikely(audit_filter_type(type))) return NULL; |
6dd80aba9 audit: audit_log_... |
1300 1301 1302 1303 1304 1305 |
if (gfp_mask & __GFP_WAIT) { if (audit_pid && audit_pid == current->pid) gfp_mask &= ~__GFP_WAIT; else reserve = 0; } |
9ad9ad385 AUDIT: Wait for b... |
1306 1307 1308 |
while (audit_backlog_limit && skb_queue_len(&audit_skb_queue) > audit_backlog_limit + reserve) { |
829199197 kernel/audit.c: a... |
1309 |
if (gfp_mask & __GFP_WAIT && audit_backlog_wait_time) { |
c81825dd6 audit: wait_for_a... |
1310 |
long sleep_time; |
9ad9ad385 AUDIT: Wait for b... |
1311 |
|
c81825dd6 audit: wait_for_a... |
1312 1313 |
sleep_time = timeout_start + audit_backlog_wait_time - jiffies; if (sleep_time > 0) { |
ae887e0bd audit: make use o... |
1314 |
sleep_time = wait_for_auditd(sleep_time); |
c81825dd6 audit: wait_for_a... |
1315 |
if (sleep_time > 0) |
ae887e0bd audit: make use o... |
1316 |
continue; |
8ac1c8d5d audit: fix endles... |
1317 |
} |
9ad9ad385 AUDIT: Wait for b... |
1318 |
} |
320f1b1ed [AUDIT] ratelimit... |
1319 |
if (audit_rate_check() && printk_ratelimit()) |
d957f7b72 audit: Use more c... |
1320 1321 1322 1323 |
pr_warn("audit_backlog=%d > audit_backlog_limit=%d ", skb_queue_len(&audit_skb_queue), audit_backlog_limit); |
fb19b4c6a AUDIT: Honour aud... |
1324 |
audit_log_lost("backlog limit exceeded"); |
ac4cec443 AUDIT: Stop waiti... |
1325 1326 |
audit_backlog_wait_time = audit_backlog_wait_overflow; wake_up(&audit_backlog_wait); |
fb19b4c6a AUDIT: Honour aud... |
1327 1328 |
return NULL; } |
e789e561a audit: reset audi... |
1329 |
audit_backlog_wait_time = AUDIT_BACKLOG_WAIT_TIME; |
9ad9ad385 AUDIT: Wait for b... |
1330 |
ab = audit_buffer_alloc(ctx, gfp_mask, type); |
1da177e4c Linux-2.6.12-rc2 |
1331 1332 1333 1334 |
if (!ab) { audit_log_lost("out of memory in audit_log_start"); return NULL; } |
bfb4496e7 AUDIT: Assign ser... |
1335 |
audit_get_stamp(ab->ctx, &t, &serial); |
197c69c6a Move ifdef CONFIG... |
1336 |
|
1da177e4c Linux-2.6.12-rc2 |
1337 1338 1339 1340 |
audit_log_format(ab, "audit(%lu.%03lu:%u): ", t.tv_sec, t.tv_nsec/1000000, serial); return ab; } |
8fc6115c2 AUDIT: expand aud... |
1341 |
/** |
5ac52f33b AUDIT: buffer aud... |
1342 |
* audit_expand - expand skb in the audit buffer |
8fc6115c2 AUDIT: expand aud... |
1343 |
* @ab: audit_buffer |
b0dd25a82 [PATCH] AUDIT: ke... |
1344 |
* @extra: space to add at tail of the skb |
8fc6115c2 AUDIT: expand aud... |
1345 1346 1347 1348 |
* * Returns 0 (no space) on failed expansion, or available space if * successful. */ |
e3b926b4c AUDIT: pass size ... |
1349 |
static inline int audit_expand(struct audit_buffer *ab, int extra) |
8fc6115c2 AUDIT: expand aud... |
1350 |
{ |
5ac52f33b AUDIT: buffer aud... |
1351 |
struct sk_buff *skb = ab->skb; |
406a1d868 [AUDIT]: Increase... |
1352 1353 1354 |
int oldtail = skb_tailroom(skb); int ret = pskb_expand_head(skb, 0, extra, ab->gfp_mask); int newtail = skb_tailroom(skb); |
5ac52f33b AUDIT: buffer aud... |
1355 1356 |
if (ret < 0) { audit_log_lost("out of memory in audit_expand"); |
8fc6115c2 AUDIT: expand aud... |
1357 |
return 0; |
5ac52f33b AUDIT: buffer aud... |
1358 |
} |
406a1d868 [AUDIT]: Increase... |
1359 1360 1361 |
skb->truesize += newtail - oldtail; return newtail; |
8fc6115c2 AUDIT: expand aud... |
1362 |
} |
1da177e4c Linux-2.6.12-rc2 |
1363 |
|
b0dd25a82 [PATCH] AUDIT: ke... |
1364 1365 |
/* * Format an audit message into the audit buffer. If there isn't enough |
1da177e4c Linux-2.6.12-rc2 |
1366 1367 |
* room in the audit buffer, more room will be allocated and vsnprint * will be called a second time. Currently, we assume that a printk |
b0dd25a82 [PATCH] AUDIT: ke... |
1368 1369 |
* can't format message larger than 1024 bytes, so we don't either. */ |
1da177e4c Linux-2.6.12-rc2 |
1370 1371 1372 1373 |
static void audit_log_vformat(struct audit_buffer *ab, const char *fmt, va_list args) { int len, avail; |
5ac52f33b AUDIT: buffer aud... |
1374 |
struct sk_buff *skb; |
eecb0a733 AUDIT: Fix abuse ... |
1375 |
va_list args2; |
1da177e4c Linux-2.6.12-rc2 |
1376 1377 1378 |
if (!ab) return; |
5ac52f33b AUDIT: buffer aud... |
1379 1380 1381 1382 |
BUG_ON(!ab->skb); skb = ab->skb; avail = skb_tailroom(skb); if (avail == 0) { |
e3b926b4c AUDIT: pass size ... |
1383 |
avail = audit_expand(ab, AUDIT_BUFSIZ); |
8fc6115c2 AUDIT: expand aud... |
1384 1385 |
if (!avail) goto out; |
1da177e4c Linux-2.6.12-rc2 |
1386 |
} |
eecb0a733 AUDIT: Fix abuse ... |
1387 |
va_copy(args2, args); |
27a884dc3 [SK_BUFF]: Conver... |
1388 |
len = vsnprintf(skb_tail_pointer(skb), avail, fmt, args); |
1da177e4c Linux-2.6.12-rc2 |
1389 1390 1391 1392 |
if (len >= avail) { /* The printk buffer is 1024 bytes long, so if we get * here and AUDIT_BUFSIZ is at least 1024, then we can * log everything that printk could have logged. */ |
b0dd25a82 [PATCH] AUDIT: ke... |
1393 1394 |
avail = audit_expand(ab, max_t(unsigned, AUDIT_BUFSIZ, 1+len-avail)); |
8fc6115c2 AUDIT: expand aud... |
1395 |
if (!avail) |
a0e86bd42 audit: always fol... |
1396 |
goto out_va_end; |
27a884dc3 [SK_BUFF]: Conver... |
1397 |
len = vsnprintf(skb_tail_pointer(skb), avail, fmt, args2); |
1da177e4c Linux-2.6.12-rc2 |
1398 |
} |
168b71739 AUDIT: Clean up l... |
1399 1400 |
if (len > 0) skb_put(skb, len); |
a0e86bd42 audit: always fol... |
1401 1402 |
out_va_end: va_end(args2); |
8fc6115c2 AUDIT: expand aud... |
1403 1404 |
out: return; |
1da177e4c Linux-2.6.12-rc2 |
1405 |
} |
b0dd25a82 [PATCH] AUDIT: ke... |
1406 1407 1408 1409 1410 1411 1412 1413 |
/** * audit_log_format - format a message into the audit buffer. * @ab: audit_buffer * @fmt: format string * @...: optional parameters matching @fmt string * * All the work is done in audit_log_vformat. */ |
1da177e4c Linux-2.6.12-rc2 |
1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 |
void audit_log_format(struct audit_buffer *ab, const char *fmt, ...) { va_list args; if (!ab) return; va_start(args, fmt); audit_log_vformat(ab, fmt, args); va_end(args); } |
b0dd25a82 [PATCH] AUDIT: ke... |
1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 |
/** * audit_log_hex - convert a buffer to hex and append it to the audit skb * @ab: the audit_buffer * @buf: buffer to convert to hex * @len: length of @buf to be converted * * No return value; failure to expand is silently ignored. * * This function will take the passed buf and convert it into a string of * ascii hex digits. The new string is placed onto the skb. */ |
b556f8ad5 Audit: standardiz... |
1435 |
void audit_log_n_hex(struct audit_buffer *ab, const unsigned char *buf, |
168b71739 AUDIT: Clean up l... |
1436 |
size_t len) |
83c7d0917 AUDIT: Avoid log ... |
1437 |
{ |
168b71739 AUDIT: Clean up l... |
1438 1439 1440 |
int i, avail, new_len; unsigned char *ptr; struct sk_buff *skb; |
168b71739 AUDIT: Clean up l... |
1441 |
|
8ef2d3040 [PATCH] sanity ch... |
1442 1443 |
if (!ab) return; |
168b71739 AUDIT: Clean up l... |
1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 |
BUG_ON(!ab->skb); skb = ab->skb; avail = skb_tailroom(skb); new_len = len<<1; if (new_len >= avail) { /* Round the buffer request up to the next multiple */ new_len = AUDIT_BUFSIZ*(((new_len-avail)/AUDIT_BUFSIZ) + 1); avail = audit_expand(ab, new_len); if (!avail) return; } |
83c7d0917 AUDIT: Avoid log ... |
1455 |
|
27a884dc3 [SK_BUFF]: Conver... |
1456 |
ptr = skb_tail_pointer(skb); |
b8dbc3241 audit: Use hex_by... |
1457 1458 |
for (i = 0; i < len; i++) ptr = hex_byte_pack_upper(ptr, buf[i]); |
168b71739 AUDIT: Clean up l... |
1459 1460 |
*ptr = 0; skb_put(skb, len << 1); /* new string is twice the old string */ |
83c7d0917 AUDIT: Avoid log ... |
1461 |
} |
9c937dcc7 [PATCH] log more ... |
1462 1463 1464 1465 |
/* * Format a string of no more than slen characters into the audit buffer, * enclosed in quote marks. */ |
b556f8ad5 Audit: standardiz... |
1466 1467 |
void audit_log_n_string(struct audit_buffer *ab, const char *string, size_t slen) |
9c937dcc7 [PATCH] log more ... |
1468 1469 1470 1471 |
{ int avail, new_len; unsigned char *ptr; struct sk_buff *skb; |
8ef2d3040 [PATCH] sanity ch... |
1472 1473 |
if (!ab) return; |
9c937dcc7 [PATCH] log more ... |
1474 1475 1476 1477 1478 1479 1480 1481 1482 |
BUG_ON(!ab->skb); skb = ab->skb; avail = skb_tailroom(skb); new_len = slen + 3; /* enclosing quotes + null terminator */ if (new_len > avail) { avail = audit_expand(ab, new_len); if (!avail) return; } |
27a884dc3 [SK_BUFF]: Conver... |
1483 |
ptr = skb_tail_pointer(skb); |
9c937dcc7 [PATCH] log more ... |
1484 1485 1486 1487 1488 1489 1490 |
*ptr++ = '"'; memcpy(ptr, string, slen); ptr += slen; *ptr++ = '"'; *ptr = 0; skb_put(skb, slen + 2); /* don't include null terminator */ } |
b0dd25a82 [PATCH] AUDIT: ke... |
1491 |
/** |
de6bbd1d3 [AUDIT] break lar... |
1492 |
* audit_string_contains_control - does a string need to be logged in hex |
f706d5d22 audit: silence tw... |
1493 1494 |
* @string: string to be checked * @len: max length of the string to check |
de6bbd1d3 [AUDIT] break lar... |
1495 1496 1497 1498 |
*/ int audit_string_contains_control(const char *string, size_t len) { const unsigned char *p; |
b3897f567 Audit: fix handli... |
1499 |
for (p = string; p < (const unsigned char *)string + len; p++) { |
1d6c9649e kernel/audit.c co... |
1500 |
if (*p == '"' || *p < 0x21 || *p > 0x7e) |
de6bbd1d3 [AUDIT] break lar... |
1501 1502 1503 1504 1505 1506 |
return 1; } return 0; } /** |
522ed7767 Audit: add TTY in... |
1507 |
* audit_log_n_untrustedstring - log a string that may contain random characters |
b0dd25a82 [PATCH] AUDIT: ke... |
1508 |
* @ab: audit_buffer |
f706d5d22 audit: silence tw... |
1509 |
* @len: length of string (not including trailing null) |
b0dd25a82 [PATCH] AUDIT: ke... |
1510 1511 1512 1513 |
* @string: string to be logged * * This code will escape a string that is passed to it if the string * contains a control character, unprintable character, double quote mark, |
168b71739 AUDIT: Clean up l... |
1514 |
* or a space. Unescaped strings will start and end with a double quote mark. |
b0dd25a82 [PATCH] AUDIT: ke... |
1515 |
* Strings that are escaped are printed in hex (2 digits per char). |
9c937dcc7 [PATCH] log more ... |
1516 1517 1518 |
* * The caller specifies the number of characters in the string to log, which may * or may not be the entire string. |
b0dd25a82 [PATCH] AUDIT: ke... |
1519 |
*/ |
b556f8ad5 Audit: standardiz... |
1520 1521 |
void audit_log_n_untrustedstring(struct audit_buffer *ab, const char *string, size_t len) |
83c7d0917 AUDIT: Avoid log ... |
1522 |
{ |
de6bbd1d3 [AUDIT] break lar... |
1523 |
if (audit_string_contains_control(string, len)) |
b556f8ad5 Audit: standardiz... |
1524 |
audit_log_n_hex(ab, string, len); |
de6bbd1d3 [AUDIT] break lar... |
1525 |
else |
b556f8ad5 Audit: standardiz... |
1526 |
audit_log_n_string(ab, string, len); |
83c7d0917 AUDIT: Avoid log ... |
1527 |
} |
9c937dcc7 [PATCH] log more ... |
1528 |
/** |
522ed7767 Audit: add TTY in... |
1529 |
* audit_log_untrustedstring - log a string that may contain random characters |
9c937dcc7 [PATCH] log more ... |
1530 1531 1532 |
* @ab: audit_buffer * @string: string to be logged * |
522ed7767 Audit: add TTY in... |
1533 |
* Same as audit_log_n_untrustedstring(), except that strlen is used to |
9c937dcc7 [PATCH] log more ... |
1534 1535 |
* determine string length. */ |
de6bbd1d3 [AUDIT] break lar... |
1536 |
void audit_log_untrustedstring(struct audit_buffer *ab, const char *string) |
9c937dcc7 [PATCH] log more ... |
1537 |
{ |
b556f8ad5 Audit: standardiz... |
1538 |
audit_log_n_untrustedstring(ab, string, strlen(string)); |
9c937dcc7 [PATCH] log more ... |
1539 |
} |
168b71739 AUDIT: Clean up l... |
1540 |
/* This is a helper-function to print the escaped d_path */ |
1da177e4c Linux-2.6.12-rc2 |
1541 |
void audit_log_d_path(struct audit_buffer *ab, const char *prefix, |
66b3fad3f constify path arg... |
1542 |
const struct path *path) |
1da177e4c Linux-2.6.12-rc2 |
1543 |
{ |
44707fdf5 d_path: Use struc... |
1544 |
char *p, *pathname; |
1da177e4c Linux-2.6.12-rc2 |
1545 |
|
8fc6115c2 AUDIT: expand aud... |
1546 |
if (prefix) |
c158a35c8 audit: no leading... |
1547 |
audit_log_format(ab, "%s", prefix); |
1da177e4c Linux-2.6.12-rc2 |
1548 |
|
168b71739 AUDIT: Clean up l... |
1549 |
/* We will allow 11 spaces for ' (deleted)' to be appended */ |
44707fdf5 d_path: Use struc... |
1550 1551 |
pathname = kmalloc(PATH_MAX+11, ab->gfp_mask); if (!pathname) { |
def575434 Audit: remove spa... |
1552 |
audit_log_string(ab, "<no_memory>"); |
168b71739 AUDIT: Clean up l... |
1553 |
return; |
1da177e4c Linux-2.6.12-rc2 |
1554 |
} |
cf28b4863 d_path: Make d_pa... |
1555 |
p = d_path(path, pathname, PATH_MAX+11); |
168b71739 AUDIT: Clean up l... |
1556 1557 |
if (IS_ERR(p)) { /* Should never happen since we send PATH_MAX */ /* FIXME: can we save some information here? */ |
def575434 Audit: remove spa... |
1558 |
audit_log_string(ab, "<too_long>"); |
5600b8927 whitespace fixes:... |
1559 |
} else |
168b71739 AUDIT: Clean up l... |
1560 |
audit_log_untrustedstring(ab, p); |
44707fdf5 d_path: Use struc... |
1561 |
kfree(pathname); |
1da177e4c Linux-2.6.12-rc2 |
1562 |
} |
4d3fb709b helper for some s... |
1563 1564 |
void audit_log_session_info(struct audit_buffer *ab) { |
4440e8548 audit: convert al... |
1565 |
unsigned int sessionid = audit_get_sessionid(current); |
4d3fb709b helper for some s... |
1566 |
uid_t auid = from_kuid(&init_user_ns, audit_get_loginuid(current)); |
b8f89caaf audit: remove new... |
1567 |
audit_log_format(ab, " auid=%u ses=%u", auid, sessionid); |
4d3fb709b helper for some s... |
1568 |
} |
9d9609851 Audit: clean up a... |
1569 1570 1571 1572 1573 1574 1575 1576 |
void audit_log_key(struct audit_buffer *ab, char *key) { audit_log_format(ab, " key="); if (key) audit_log_untrustedstring(ab, key); else audit_log_format(ab, "(null)"); } |
b24a30a73 audit: fix event ... |
1577 1578 1579 1580 1581 1582 1583 |
void audit_log_cap(struct audit_buffer *ab, char *prefix, kernel_cap_t *cap) { int i; audit_log_format(ab, " %s=", prefix); CAP_FOR_EACH_U32(i) { audit_log_format(ab, "%08x", |
7d8b6c637 CAPABILITIES: rem... |
1584 |
cap->cap[CAP_LAST_U32 - i]); |
b24a30a73 audit: fix event ... |
1585 1586 |
} } |
691e6d59d audit: reduce sco... |
1587 |
static void audit_log_fcaps(struct audit_buffer *ab, struct audit_names *name) |
b24a30a73 audit: fix event ... |
1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 |
{ kernel_cap_t *perm = &name->fcap.permitted; kernel_cap_t *inh = &name->fcap.inheritable; int log = 0; if (!cap_isclear(*perm)) { audit_log_cap(ab, "cap_fp", perm); log = 1; } if (!cap_isclear(*inh)) { audit_log_cap(ab, "cap_fi", inh); log = 1; } if (log) audit_log_format(ab, " cap_fe=%d cap_fver=%x", name->fcap.fE, name->fcap_ver); } static inline int audit_copy_fcaps(struct audit_names *name, const struct dentry *dentry) { struct cpu_vfs_cap_data caps; int rc; if (!dentry) return 0; rc = get_vfs_caps_from_disk(dentry, &caps); if (rc) return rc; name->fcap.permitted = caps.permitted; name->fcap.inheritable = caps.inheritable; name->fcap.fE = !!(caps.magic_etc & VFS_CAP_FLAGS_EFFECTIVE); name->fcap_ver = (caps.magic_etc & VFS_CAP_REVISION_MASK) >> VFS_CAP_REVISION_SHIFT; return 0; } /* Copy inode data into an audit_names. */ void audit_copy_inode(struct audit_names *name, const struct dentry *dentry, const struct inode *inode) { name->ino = inode->i_ino; name->dev = inode->i_sb->s_dev; name->mode = inode->i_mode; name->uid = inode->i_uid; name->gid = inode->i_gid; name->rdev = inode->i_rdev; security_inode_getsecid(inode, &name->osid); audit_copy_fcaps(name, dentry); } /** * audit_log_name - produce AUDIT_PATH record from struct audit_names * @context: audit_context for the task * @n: audit_names structure with reportable details * @path: optional path to report instead of audit_names->name * @record_num: record number to report when handling a list of names * @call_panic: optional pointer to int that will be updated if secid fails */ void audit_log_name(struct audit_context *context, struct audit_names *n, struct path *path, int record_num, int *call_panic) { struct audit_buffer *ab; ab = audit_log_start(context, GFP_KERNEL, AUDIT_PATH); if (!ab) return; audit_log_format(ab, "item=%d", record_num); if (path) audit_log_d_path(ab, " name=", path); else if (n->name) { switch (n->name_len) { case AUDIT_NAME_FULL: /* log the full path */ audit_log_format(ab, " name="); audit_log_untrustedstring(ab, n->name->name); break; case 0: /* name was specified as a relative path and the * directory component is the cwd */ audit_log_d_path(ab, " name=", &context->pwd); break; default: /* log the name's directory component */ audit_log_format(ab, " name="); audit_log_n_untrustedstring(ab, n->name->name, n->name_len); } } else audit_log_format(ab, " name=(null)"); if (n->ino != (unsigned long)-1) { audit_log_format(ab, " inode=%lu" " dev=%02x:%02x mode=%#ho" " ouid=%u ogid=%u rdev=%02x:%02x", n->ino, MAJOR(n->dev), MINOR(n->dev), n->mode, from_kuid(&init_user_ns, n->uid), from_kgid(&init_user_ns, n->gid), MAJOR(n->rdev), MINOR(n->rdev)); } if (n->osid != 0) { char *ctx = NULL; u32 len; if (security_secid_to_secctx( n->osid, &ctx, &len)) { audit_log_format(ab, " osid=%u", n->osid); if (call_panic) *call_panic = 2; } else { audit_log_format(ab, " obj=%s", ctx); security_release_secctx(ctx, len); } } |
d3aea84a4 audit: log the au... |
1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 |
/* log the audit_names record type */ audit_log_format(ab, " nametype="); switch(n->type) { case AUDIT_TYPE_NORMAL: audit_log_format(ab, "NORMAL"); break; case AUDIT_TYPE_PARENT: audit_log_format(ab, "PARENT"); break; case AUDIT_TYPE_CHILD_DELETE: audit_log_format(ab, "DELETE"); break; case AUDIT_TYPE_CHILD_CREATE: audit_log_format(ab, "CREATE"); break; default: audit_log_format(ab, "UNKNOWN"); break; } |
b24a30a73 audit: fix event ... |
1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 |
audit_log_fcaps(ab, n); audit_log_end(ab); } int audit_log_task_context(struct audit_buffer *ab) { char *ctx = NULL; unsigned len; int error; u32 sid; security_task_getsecid(current, &sid); if (!sid) return 0; error = security_secid_to_secctx(sid, &ctx, &len); if (error) { if (error != -EINVAL) goto error_path; return 0; } audit_log_format(ab, " subj=%s", ctx); security_release_secctx(ctx, len); return 0; error_path: audit_panic("error in audit_log_task_context"); return error; } EXPORT_SYMBOL(audit_log_task_context); void audit_log_task_info(struct audit_buffer *ab, struct task_struct *tsk) { const struct cred *cred; |
9eab339b1 audit: get comm u... |
1764 |
char comm[sizeof(tsk->comm)]; |
b24a30a73 audit: fix event ... |
1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 |
struct mm_struct *mm = tsk->mm; char *tty; if (!ab) return; /* tsk == current */ cred = current_cred(); spin_lock_irq(&tsk->sighand->siglock); if (tsk->signal && tsk->signal->tty && tsk->signal->tty->name) tty = tsk->signal->tty->name; else tty = "(none)"; spin_unlock_irq(&tsk->sighand->siglock); audit_log_format(ab, |
c92cdeb45 audit: convert PP... |
1782 |
" ppid=%d pid=%d auid=%u uid=%u gid=%u" |
b24a30a73 audit: fix event ... |
1783 |
" euid=%u suid=%u fsuid=%u" |
2f2ad1013 audit: restore or... |
1784 |
" egid=%u sgid=%u fsgid=%u tty=%s ses=%u", |
c92cdeb45 audit: convert PP... |
1785 |
task_ppid_nr(tsk), |
f1dc4867f audit: anchor all... |
1786 |
task_pid_nr(tsk), |
b24a30a73 audit: fix event ... |
1787 1788 1789 1790 1791 1792 1793 1794 1795 |
from_kuid(&init_user_ns, audit_get_loginuid(tsk)), from_kuid(&init_user_ns, cred->uid), from_kgid(&init_user_ns, cred->gid), from_kuid(&init_user_ns, cred->euid), from_kuid(&init_user_ns, cred->suid), from_kuid(&init_user_ns, cred->fsuid), from_kgid(&init_user_ns, cred->egid), from_kgid(&init_user_ns, cred->sgid), from_kgid(&init_user_ns, cred->fsgid), |
2f2ad1013 audit: restore or... |
1796 |
tty, audit_get_sessionid(tsk)); |
b24a30a73 audit: fix event ... |
1797 |
|
b24a30a73 audit: fix event ... |
1798 |
audit_log_format(ab, " comm="); |
9eab339b1 audit: get comm u... |
1799 |
audit_log_untrustedstring(ab, get_task_comm(comm, tsk)); |
b24a30a73 audit: fix event ... |
1800 1801 1802 1803 1804 1805 |
if (mm) { down_read(&mm->mmap_sem); if (mm->exe_file) audit_log_d_path(ab, " exe=", &mm->exe_file->f_path); up_read(&mm->mmap_sem); |
ff235f51a audit: Added exe ... |
1806 1807 |
} else audit_log_format(ab, " exe=(null)"); |
b24a30a73 audit: fix event ... |
1808 1809 1810 |
audit_log_task_context(ab); } EXPORT_SYMBOL(audit_log_task_info); |
b0dd25a82 [PATCH] AUDIT: ke... |
1811 |
/** |
a51d9eaa4 fs: add link rest... |
1812 1813 1814 1815 1816 1817 1818 |
* audit_log_link_denied - report a link restriction denial * @operation: specific link opreation * @link: the path that triggered the restriction */ void audit_log_link_denied(const char *operation, struct path *link) { struct audit_buffer *ab; |
b24a30a73 audit: fix event ... |
1819 1820 1821 1822 1823 |
struct audit_names *name; name = kzalloc(sizeof(*name), GFP_NOFS); if (!name) return; |
a51d9eaa4 fs: add link rest... |
1824 |
|
b24a30a73 audit: fix event ... |
1825 |
/* Generate AUDIT_ANOM_LINK with subject, operation, outcome. */ |
a51d9eaa4 fs: add link rest... |
1826 1827 |
ab = audit_log_start(current->audit_context, GFP_KERNEL, AUDIT_ANOM_LINK); |
d1c7d97ad fs: handle failed... |
1828 |
if (!ab) |
b24a30a73 audit: fix event ... |
1829 1830 1831 1832 |
goto out; audit_log_format(ab, "op=%s", operation); audit_log_task_info(ab, current); audit_log_format(ab, " res=0"); |
a51d9eaa4 fs: add link rest... |
1833 |
audit_log_end(ab); |
b24a30a73 audit: fix event ... |
1834 1835 1836 1837 1838 1839 1840 |
/* Generate AUDIT_PATH record with object. */ name->type = AUDIT_TYPE_NORMAL; audit_copy_inode(name, link->dentry, link->dentry->d_inode); audit_log_name(current->audit_context, name, link, 0, NULL); out: kfree(name); |
a51d9eaa4 fs: add link rest... |
1841 1842 1843 |
} /** |
b0dd25a82 [PATCH] AUDIT: ke... |
1844 1845 1846 |
* audit_log_end - end one audit record * @ab: the audit_buffer * |
451f92163 audit: add netlin... |
1847 1848 1849 1850 |
* netlink_unicast() cannot be called inside an irq context because it blocks * (last arg, flags, is not set to MSG_DONTWAIT), so the audit buffer is placed * on a queue and a tasklet is scheduled to remove them from the queue outside * the irq context. May be called in any context. |
b0dd25a82 [PATCH] AUDIT: ke... |
1851 |
*/ |
b7d112581 AUDIT: Send netli... |
1852 |
void audit_log_end(struct audit_buffer *ab) |
1da177e4c Linux-2.6.12-rc2 |
1853 |
{ |
1da177e4c Linux-2.6.12-rc2 |
1854 1855 1856 1857 1858 |
if (!ab) return; if (!audit_rate_check()) { audit_log_lost("rate limit exceeded"); } else { |
8d07a67cf [PATCH] drop EOE ... |
1859 |
struct nlmsghdr *nlh = nlmsg_hdr(ab->skb); |
451f92163 audit: add netlin... |
1860 |
|
54e05eddb audit: set nlmsg_... |
1861 |
nlh->nlmsg_len = ab->skb->len; |
54dc77d97 audit: use suppli... |
1862 |
kauditd_send_multicast_skb(ab->skb, ab->gfp_mask); |
451f92163 audit: add netlin... |
1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 |
/* * The original kaudit unicast socket sends up messages with * nlmsg_len set to the payload length rather than the entire * message length. This breaks the standard set by netlink. * The existing auditd daemon assumes this breakage. Fixing * this would require co-ordinating a change in the established * protocol between the kaudit kernel subsystem and the auditd * userspace code. */ |
54e05eddb audit: set nlmsg_... |
1873 |
nlh->nlmsg_len -= NLMSG_HDRLEN; |
f3d357b09 Audit: save audit... |
1874 |
|
b7d112581 AUDIT: Send netli... |
1875 |
if (audit_pid) { |
b7d112581 AUDIT: Send netli... |
1876 |
skb_queue_tail(&audit_skb_queue, ab->skb); |
b7d112581 AUDIT: Send netli... |
1877 |
wake_up_interruptible(&kauditd_wait); |
f3d357b09 Audit: save audit... |
1878 |
} else { |
038cbcf65 Audit: unify the ... |
1879 |
audit_printk_skb(ab->skb); |
b7d112581 AUDIT: Send netli... |
1880 |
} |
f3d357b09 Audit: save audit... |
1881 |
ab->skb = NULL; |
1da177e4c Linux-2.6.12-rc2 |
1882 |
} |
16e1904e6 AUDIT: Add helper... |
1883 |
audit_buffer_free(ab); |
1da177e4c Linux-2.6.12-rc2 |
1884 |
} |
b0dd25a82 [PATCH] AUDIT: ke... |
1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 |
/** * audit_log - Log an audit record * @ctx: audit context * @gfp_mask: type of allocation * @type: audit message type * @fmt: format string to use * @...: variable parameters matching the format string * * This is a convenience function that calls audit_log_start, * audit_log_vformat, and audit_log_end. It may be called * in any context. */ |
5600b8927 whitespace fixes:... |
1897 |
void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type, |
9ad9ad385 AUDIT: Wait for b... |
1898 |
const char *fmt, ...) |
1da177e4c Linux-2.6.12-rc2 |
1899 1900 1901 |
{ struct audit_buffer *ab; va_list args; |
9ad9ad385 AUDIT: Wait for b... |
1902 |
ab = audit_log_start(ctx, gfp_mask, type); |
1da177e4c Linux-2.6.12-rc2 |
1903 1904 1905 1906 1907 1908 1909 |
if (ab) { va_start(args, fmt); audit_log_vformat(ab, fmt, args); va_end(args); audit_log_end(ab); } } |
bf45da97a [PATCH] EXPORT_SY... |
1910 |
|
131ad62d8 netfilter: add SE... |
1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 |
#ifdef CONFIG_SECURITY /** * audit_log_secctx - Converts and logs SELinux context * @ab: audit_buffer * @secid: security number * * This is a helper function that calls security_secid_to_secctx to convert * secid to secctx and then adds the (converted) SELinux context to the audit * log by calling audit_log_format, thus also preventing leak of internal secid * to userspace. If secid cannot be converted audit_panic is called. */ void audit_log_secctx(struct audit_buffer *ab, u32 secid) { u32 len; char *secctx; if (security_secid_to_secctx(secid, &secctx, &len)) { audit_panic("Cannot convert secid to context"); } else { audit_log_format(ab, " obj=%s", secctx); security_release_secctx(secctx, len); } } EXPORT_SYMBOL(audit_log_secctx); #endif |
bf45da97a [PATCH] EXPORT_SY... |
1936 1937 1938 1939 |
EXPORT_SYMBOL(audit_log_start); EXPORT_SYMBOL(audit_log_end); EXPORT_SYMBOL(audit_log_format); EXPORT_SYMBOL(audit_log); |