01 Feb, 2009
1 commit
-
This adds another inet device option to enable gratuitous ARP
when device is brought up or address change. This is handy for
clusters or virtualization.Signed-off-by: Stephen Hemminger
Signed-off-by: Jeremy Fitzhardinge
Signed-off-by: David S. Miller
30 Oct, 2008
1 commit
-
On Linux all filesystems are supposed to be operating under Posix'
restricted chown. Restricted chown means it restricts chown to the owner
unless you have CAP_FOWNER.NOTE: that 2 files outside of fs/xfs have been modified too for this
change.Reviewed-by: Dave Chinner
SGI-PV: 988919
SGI-Modid: 2.6.x-xfs-melb:linux:32413b
Signed-off-by: Tim Shimmin
Signed-off-by: Christoph Hellwig
Signed-off-by: David Chinner
Signed-off-by: Lachlan McIlroy
26 Jul, 2008
1 commit
-
Catch, e. g., 644/0644 typo.
Signed-off-by: Alexey Dobriyan
Acked-by: "Eric W. Biederman"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
09 Feb, 2008
1 commit
-
Remains the question whether it is intended that many, perhaps even large,
tables are compiled in without ever having a chance to get used, i.e.
whether there shouldn't #ifdef CONFIG_xxx get added.[akpm@linux-foundation.org: fix cut-n-paste error]
Signed-off-by: Jan Beulich
Acked-by: "Eric W. Biederman"
Cc: Dave Jones
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
06 Feb, 2008
1 commit
-
The capability bounding set is a set beyond which capabilities cannot grow.
Currently cap_bset is per-system. It can be manipulated through sysctl,
but only init can add capabilities. Root can remove capabilities. By
default it includes all caps except CAP_SETPCAP.This patch makes the bounding set per-process when file capabilities are
enabled. It is inherited at fork from parent. Noone can add elements,
CAP_SETPCAP is required to remove them.One example use of this is to start a safer container. For instance, until
device namespaces or per-container device whitelists are introduced, it is
best to take CAP_MKNOD away from a container.The bounding set will not affect pP and pE immediately. It will only
affect pP' and pE' after subsequent exec()s. It also does not affect pI,
and exec() does not constrain pI'. So to really start a shell with no way
of regain CAP_MKNOD, you would doprctl(PR_CAPBSET_DROP, CAP_MKNOD);
cap_t cap = cap_get_proc();
cap_value_t caparray[1];
caparray[0] = CAP_MKNOD;
cap_set_flag(cap, CAP_INHERITABLE, 1, caparray, CAP_DROP);
cap_set_proc(cap);
cap_free(cap);The following test program will get and set the bounding
set (but not pI). For instance./bset get
(lists capabilities in bset)
./bset drop cap_net_raw
(starts shell with new bset)
(use capset, setuid binary, or binary with
file capabilities to try to increase caps)************************************************************
cap_bound.c
************************************************************
#include
#include
#include
#include
#include
#include
#include#ifndef PR_CAPBSET_READ
#define PR_CAPBSET_READ 23
#endif#ifndef PR_CAPBSET_DROP
#define PR_CAPBSET_DROP 24
#endifint usage(char *me)
{
printf("Usage: %s get\n", me);
printf(" %s drop \n", me);
return 1;
}#define numcaps 32
char *captable[numcaps] = {
"cap_chown",
"cap_dac_override",
"cap_dac_read_search",
"cap_fowner",
"cap_fsetid",
"cap_kill",
"cap_setgid",
"cap_setuid",
"cap_setpcap",
"cap_linux_immutable",
"cap_net_bind_service",
"cap_net_broadcast",
"cap_net_admin",
"cap_net_raw",
"cap_ipc_lock",
"cap_ipc_owner",
"cap_sys_module",
"cap_sys_rawio",
"cap_sys_chroot",
"cap_sys_ptrace",
"cap_sys_pacct",
"cap_sys_admin",
"cap_sys_boot",
"cap_sys_nice",
"cap_sys_resource",
"cap_sys_time",
"cap_sys_tty_config",
"cap_mknod",
"cap_lease",
"cap_audit_write",
"cap_audit_control",
"cap_setfcap"
};int getbcap(void)
{
int comma=0;
unsigned long i;
int ret;printf("i know of %d capabilities\n", numcaps);
printf("capability bounding set:");
for (i=0; i< 0)
perror("prctl");
else if (ret==1)
printf("%s%s", (comma++) ? ", " : " ", captable[i]);
}
printf("\n");
return 0;
}int capdrop(char *str)
{
unsigned long i;int found=0;
for (i=0; i
Signed-off-by: Andrew G. Morgan
Cc: Stephen Smalley
Cc: James Morris
Cc: Chris Wright
Cc: Casey Schaufler a
Signed-off-by: "Serge E. Hallyn"
Tested-by: Jiri Slaby
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
29 Jan, 2008
1 commit
-
This patch implements the basic infrastructure for per namespace sysctls.
A list of lists of sysctl headers is added, allowing each namespace to have
it's own list of sysctl headers.Each list of sysctl headers has a lookup function to find the first
sysctl header in the list, allowing the lists to have a per namespace
instance.register_sysct_root is added to tell sysctl.c about additional
lists of sysctl_headers. As all of the users are expected to be in
kernel no unregister function is provided.sysctl_head_next is updated to walk through the list of lists.
__register_sysctl_paths is added to add a new sysctl table on
a non-default sysctl list.The only intrusive part of this patch is propagating the information
to decided which list of sysctls to use for sysctl_check_table.Signed-off-by: Eric W. Biederman
Cc: Serge Hallyn
Cc: Daniel Lezcano
Cc: Cedric Le Goater
Cc: Pavel Emelyanov
Signed-off-by: Andrew Morton
Signed-off-by: Herbert Xu
Signed-off-by: David S. Miller
26 Jan, 2008
1 commit
-
Forgot to remove this when removing the appldata binary sysctls.
Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky
18 Dec, 2007
1 commit
-
Fix:
sysctl table check failed: /net/ax25/ax0/ax25_default_mode .3.9.1.2 Unknown
sysctl binary path
Pid: 2936, comm: kissattach Not tainted 2.6.24-rc5 #1
[] set_fail+0x3b/0x43
[] sysctl_check_table+0x408/0x456
[] sysctl_check_table+0x41c/0x456
[] sysctl_check_table+0x41c/0x456
...Signed-off-by: Eric W. Biederman
Cc: Bernard Pidoux
Cc: "David S. Miller"
Cc: "Rafael J. Wysocki"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
05 Dec, 2007
1 commit
-
Based upon a report by Mikael Pettersson.
Signed-off-by: David S. Miller
27 Nov, 2007
1 commit
-
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/net-2.6: (41 commits)
[XFRM]: Fix leak of expired xfrm_states
[ATM]: [he] initialize lock and tasklet earlier
[IPV4]: Remove bogus ifdef mess in arp_process
[SKBUFF]: Free old skb properly in skb_morph
[IPV4]: Fix memory leak in inet_hashtables.h when NUMA is on
[IPSEC]: Temporarily remove locks around copying of non-atomic fields
[TCP] MTUprobe: Cleanup send queue check (no need to loop)
[TCP]: MTUprobe: receiver window & data available checks fixed
[MAINTAINERS]: tlan list is subscribers-only
[SUNRPC]: Remove SPIN_LOCK_UNLOCKED
[SUNRPC]: Make xprtsock.c:xs_setup_{udp,tcp}() static
[PFKEY]: Sending an SADB_GET responds with an SADB_GET
[IRDA]: Compilation for CONFIG_INET=n case
[IPVS]: Fix compiler warning about unused register_ip_vs_protocol
[ARP]: Fix arp reply when sender ip 0
[IPV6] TCPMD5: Fix deleting key operation.
[IPV6] TCPMD5: Check return value of tcp_alloc_md5sig_pool().
[IPV4] TCPMD5: Use memmove() instead of memcpy() because we have overlaps.
[IPV4] TCPMD5: Omit redundant NULL check for kfree() argument.
ieee80211: Stop net_ratelimit/IEEE80211_DEBUG_DROP log pollution
...
20 Nov, 2007
5 commits
-
Remove binary sysctls that never worked due to missing strategy functions.
Cc: "Eric W. Biederman"
Cc: Christian Borntraeger
Cc: Gerald Schaefer
Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
Remove binary sysctls that never worked due to missing strategy functions.
Cc: Christian Borntraeger
Signed-off-by: Heiko Carstens
Signed-off-by: "Eric W. Biederman"
Signed-off-by: Andrew Morton
Signed-off-by: Martin Schwidefsky -
Switch the remaining IPVS sysctl entries over to to use CTL_UNNUMBERED,
I stronly doubt that anyone is using the sys_sysctl interface to
these variables.Signed-off-by: Simon Horman
Signed-off-by: David S. Miller -
sysctl table check failed: /net/ipv4/vs/lblc_expiration .3.5.21.19 Missing strategy
[...]
sysctl table check failed: /net/ipv4/vs/lblcr_expiration .3.5.21.20 Missing strategySwitch these entried over to use CTL_UNNUMBERED as clearly
the sys_syscal portion wasn't working.This is along the same lines as Christian Borntraeger's patch that fixes
up entries with no stratergy in net/ipv4/ipvs/ip_vs_ctl.cSigned-off-by: Simon Horman
Signed-off-by: David S. Miller -
Running the latest git code I get the following messages during boot:
sysctl table check failed: /net/ipv4/vs/drop_entry .3.5.21.4 Missing strategy
[...]
sysctl table check failed: /net/ipv4/vs/drop_packet .3.5.21.5 Missing strategy
[...]
sysctl table check failed: /net/ipv4/vs/secure_tcp .3.5.21.6 Missing strategy
[...]
sysctl table check failed: /net/ipv4/vs/sync_threshold .3.5.21.24 Missing strategyI removed the binary sysctl handler for those messages and also removed
the definitions in ip_vs.h. The alternative would be to implement a
proper strategy handler, but syscall sysctl is deprecated.There are other sysctl definitions that are commented out or work with
the default sysctl_data strategy. I did not touch these.Signed-off-by: Christian Borntraeger
Acked-by: Simon Horman
Signed-off-by: David S. Miller
14 Nov, 2007
1 commit
-
As seen when booting ppc64_defconfig:
sysctl table check failed: /net/token-ring .3.14 procname does not match binary path procname
Signed-off-by: Olof Johansson
Signed-off-by: David S. Miller
06 Nov, 2007
1 commit
-
Let's make immediately obvious from where sysctl comes from and messages
itself more noticeable.Signed-off-by: Alexey Dobriyan
Acked-by: "Eric W. Biederman"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
23 Oct, 2007
1 commit
-
Gabriel C reported that modprobing appletalk on current git gives a
warning in dmesg :"sysctl table check failed: /net/appletalk .3.7 procname does not match binary path procname"
Oops. My apologies it appears I made a mistake when creating my table
to check up on sysctl values.Signed-off-by: "Eric W. Biederman"
Tested-by: Gabriel C
Signed-off-by: Linus Torvalds
19 Oct, 2007
4 commits
-
The non-filesystem capability meaning of CAP_SETPCAP is that a process, p1,
can change the capabilities of another process, p2. This is not the
meaning that was intended for this capability at all, and this
implementation came about purely because, without filesystem capabilities,
there was no way to use capabilities without one process bestowing them on
another.Since we now have a filesystem support for capabilities we can fix the
implementation of CAP_SETPCAP.The most significant thing about this change is that, with it in effect, no
process can set the capabilities of another process.The capabilities of a program are set via the capability convolution
rules:pI(post-exec) = pI(pre-exec)
pP(post-exec) = (X(aka cap_bset) & fP) | (pI(post-exec) & fI)
pE(post-exec) = fE ? pP(post-exec) : 0at exec() time. As such, the only influence the pre-exec() program can
have on the post-exec() program's capabilities are through the pI
capability set.The correct implementation for CAP_SETPCAP (and that enabled by this patch)
is that it can be used to add extra pI capabilities to the current process
- to be picked up by subsequent exec()s when the above convolution rules
are applied.Here is how it works:
Let's say we have a process, p. It has capability sets, pE, pP and pI.
Generally, p, can change the value of its own pI to pI' where(pI' & ~pI) & ~pP = 0.
That is, the only new things in pI' that were not present in pI need to
be present in pP.The role of CAP_SETPCAP is basically to permit changes to pI beyond
the above:if (pE & CAP_SETPCAP) {
pI' = anything; /* ie., even (pI' & ~pI) & ~pP != 0 */
}This capability is useful for things like login, which (say, via
pam_cap) might want to raise certain inheritable capabilities for use
by the children of the logged-in user's shell, but those capabilities
are not useful to or needed by the login program itself.One such use might be to limit who can run ping. You set the
capabilities of the 'ping' program to be "= cap_net_raw+i", and then
only shells that have (pI & CAP_NET_RAW) will be able to run
it. Without CAP_SETPCAP implemented as described above, login(pam_cap)
would have to also have (pP & CAP_NET_RAW) in order to raise this
capability and pass it on through the inheritable set.Signed-off-by: Andrew Morgan
Signed-off-by: Serge E. Hallyn
Cc: Stephen Smalley
Cc: James Morris
Cc: Casey Schaufler
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
It turns out that the net/irda code didn't register any of it's binary paths
in the global sysctl.h header file so I missed them completely when making an
authoritative list of binary sysctl paths in the kernel. So add them to the
list of valid binary sysctl paths.Signed-off-by: Eric W. Biederman
Acked-by: Samuel Ortiz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Well it turns out after I dug into the problems a little more I was returning
a few false positives so this patch updates my logic to remove them.- Don't complain about 0 ctl_names in sysctl_check_binary_path
It is valid for someone to remove the sysctl binary interface
and still keep the same sysctl proc interface.- Count ctl_names and procnames as matching if they both don't
exist.- Only warn about missing min&max when the generic functions care.
Signed-off-by: Eric W. Biederman
Cc: Alexey Dobriyan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
After going through the kernels sysctl tables several times it has become
clear that code review and testing is just not effective in prevent
problematic sysctl tables from being used in the stable kernel. I certainly
can't seem to fix the problems as fast as they are introduced.Therefore this patch adds sysctl_check_table which is called when a sysctl
table is registered and checks to see if we have a problematic sysctl table.The biggest part of the code is the table of valid binary sysctl entries, but
since we have frozen our set of binary sysctls this table should not need to
change, and it makes it much easier to detect when someone unintentionally
adds a new binary sysctl value.As best as I can determine all of the several hundred errors spewed on boot up
now are legitimate.[bunk@kernel.org: kernel/sysctl_check.c must #include ]
Signed-off-by: Eric W. Biederman
Cc: Alexey Dobriyan
Signed-off-by: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
