10 May, 2017
1 commit
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Pull misc vfs updates from Al Viro:
"Assorted bits and pieces from various people. No common topic in this
pile, sorry"* 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
fs/affs: add rename exchange
fs/affs: add rename2 to prepare multiple methods
Make stat/lstat/fstatat pass AT_NO_AUTOMOUNT to vfs_statx()
fs: don't set *REFERENCED on single use objects
fs: compat: Remove warning from COMPATIBLE_IOCTL
remove pointless extern of atime_need_update_rcu()
fs: completely ignore unknown open flags
fs: add a VALID_OPEN_FLAGS
fs: remove _submit_bh()
fs: constify tree_descr arrays passed to simple_fill_super()
fs: drop duplicate header percpu-rwsem.h
fs/affs: bugfix: Write files greater than page size on OFS
fs/affs: bugfix: enable writes on OFS disks
fs/affs: remove node generation check
fs/affs: import amigaffs.h
fs/affs: bugfix: make symbolic links work again
09 May, 2017
3 commits
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CURRENT_TIME macro is not y2038 safe on 32 bit systems.
The patch replaces all the uses of CURRENT_TIME by current_time().
This is also in preparation for the patch that transitions vfs
timestamps to use 64 bit time and hence make them y2038 safe.
current_time() is also planned to be transitioned to y2038 safe behavior
along with this change.CURRENT_TIME macro will be deleted before merging the aforementioned
change.Link: http://lkml.kernel.org/r/1491613030-11599-11-git-send-email-deepa.kernel@gmail.com
Signed-off-by: Deepa Dinamani
Acked-by: John Johansen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
There are many code paths opencoding kvmalloc. Let's use the helper
instead. The main difference to kvmalloc is that those users are
usually not considering all the aspects of the memory allocator. E.g.
allocation requests
Reviewed-by: Boris Ostrovsky # Xen bits
Acked-by: Kees Cook
Acked-by: Vlastimil Babka
Acked-by: Andreas Dilger # Lustre
Acked-by: Christian Borntraeger # KVM/s390
Acked-by: Dan Williams # nvdim
Acked-by: David Sterba # btrfs
Acked-by: Ilya Dryomov # Ceph
Acked-by: Tariq Toukan # mlx4
Acked-by: Leon Romanovsky # mlx5
Cc: Martin Schwidefsky
Cc: Heiko Carstens
Cc: Herbert Xu
Cc: Anton Vorontsov
Cc: Colin Cross
Cc: Tony Luck
Cc: "Rafael J. Wysocki"
Cc: Ben Skeggs
Cc: Kent Overstreet
Cc: Santosh Raspatur
Cc: Hariprasad S
Cc: Yishai Hadas
Cc: Oleg Drokin
Cc: "Yan, Zheng"
Cc: Alexander Viro
Cc: Alexei Starovoitov
Cc: Eric Dumazet
Cc: David Miller
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Patch series "kvmalloc", v5.
There are many open coded kmalloc with vmalloc fallback instances in the
tree. Most of them are not careful enough or simply do not care about
the underlying semantic of the kmalloc/page allocator which means that
a) some vmalloc fallbacks are basically unreachable because the kmalloc
part will keep retrying until it succeeds b) the page allocator can
invoke a really disruptive steps like the OOM killer to move forward
which doesn't sound appropriate when we consider that the vmalloc
fallback is available.As it can be seen implementing kvmalloc requires quite an intimate
knowledge if the page allocator and the memory reclaim internals which
strongly suggests that a helper should be implemented in the memory
subsystem proper.Most callers, I could find, have been converted to use the helper
instead. This is patch 6. There are some more relying on __GFP_REPEAT
in the networking stack which I have converted as well and Eric Dumazet
was not opposed [2] to convert them as well.[1] http://lkml.kernel.org/r/20170130094940.13546-1-mhocko@kernel.org
[2] http://lkml.kernel.org/r/1485273626.16328.301.camel@edumazet-glaptop3.roam.corp.google.comThis patch (of 9):
Using kmalloc with the vmalloc fallback for larger allocations is a
common pattern in the kernel code. Yet we do not have any common helper
for that and so users have invented their own helpers. Some of them are
really creative when doing so. Let's just add kv[mz]alloc and make sure
it is implemented properly. This implementation makes sure to not make
a large memory pressure for > PAGE_SZE requests (__GFP_NORETRY) and also
to not warn about allocation failures. This also rules out the OOM
killer as the vmalloc is a more approapriate fallback than a disruptive
user visible action.This patch also changes some existing users and removes helpers which
are specific for them. In some cases this is not possible (e.g.
ext4_kvmalloc, libcfs_kvzalloc) because those seems to be broken and
require GFP_NO{FS,IO} context which is not vmalloc compatible in general
(note that the page table allocation is GFP_KERNEL). Those need to be
fixed separately.While we are at it, document that __vmalloc{_node} about unsupported gfp
mask because there seems to be a lot of confusion out there.
kvmalloc_node will warn about GFP_KERNEL incompatible (which are not
superset) flags to catch new abusers. Existing ones would have to die
slowly.[sfr@canb.auug.org.au: f2fs fixup]
Link: http://lkml.kernel.org/r/20170320163735.332e64b7@canb.auug.org.au
Link: http://lkml.kernel.org/r/20170306103032.2540-2-mhocko@kernel.org
Signed-off-by: Michal Hocko
Signed-off-by: Stephen Rothwell
Reviewed-by: Andreas Dilger [ext4 part]
Acked-by: Vlastimil Babka
Cc: John Hubbard
Cc: David Miller
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
03 May, 2017
3 commits
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Pull security subsystem updates from James Morris:
"Highlights:IMA:
- provide ">" and " of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security: (98 commits)
tpm: Fix reference count to main device
tpm_tis: convert to using locality callbacks
tpm: fix handling of the TPM 2.0 event logs
tpm_crb: remove a cruft constant
keys: select CONFIG_CRYPTO when selecting DH / KDF
apparmor: Make path_max parameter readonly
apparmor: fix parameters so that the permission test is bypassed at boot
apparmor: fix invalid reference to index variable of iterator line 836
apparmor: use SHASH_DESC_ON_STACK
security/apparmor/lsm.c: set debug messages
apparmor: fix boolreturn.cocci warnings
Smack: Use GFP_KERNEL for smk_netlbl_mls().
smack: fix double free in smack_parse_opts_str()
KEYS: add SP800-56A KDF support for DH
KEYS: Keyring asymmetric key restrict method with chaining
KEYS: Restrict asymmetric key linkage using a specific keychain
KEYS: Add a lookup_restriction function for the asymmetric key type
KEYS: Add KEYCTL_RESTRICT_KEYRING
KEYS: Consistent ordering for __key_link_begin and restrict check
KEYS: Add an optional lookup_restriction hook to key_type
... -
Pull networking updates from David Millar:
"Here are some highlights from the 2065 networking commits that
happened this development cycle:1) XDP support for IXGBE (John Fastabend) and thunderx (Sunil Kowuri)
2) Add a generic XDP driver, so that anyone can test XDP even if they
lack a networking device whose driver has explicit XDP support
(me).3) Sparc64 now has an eBPF JIT too (me)
4) Add a BPF program testing framework via BPF_PROG_TEST_RUN (Alexei
Starovoitov)5) Make netfitler network namespace teardown less expensive (Florian
Westphal)6) Add symmetric hashing support to nft_hash (Laura Garcia Liebana)
7) Implement NAPI and GRO in netvsc driver (Stephen Hemminger)
8) Support TC flower offload statistics in mlxsw (Arkadi Sharshevsky)
9) Multiqueue support in stmmac driver (Joao Pinto)
10) Remove TCP timewait recycling, it never really could possibly work
well in the real world and timestamp randomization really zaps any
hint of usability this feature had (Soheil Hassas Yeganeh)11) Support level3 vs level4 ECMP route hashing in ipv4 (Nikolay
Aleksandrov)12) Add socket busy poll support to epoll (Sridhar Samudrala)
13) Netlink extended ACK support (Johannes Berg, Pablo Neira Ayuso,
and several others)14) IPSEC hw offload infrastructure (Steffen Klassert)"
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (2065 commits)
tipc: refactor function tipc_sk_recv_stream()
tipc: refactor function tipc_sk_recvmsg()
net: thunderx: Optimize page recycling for XDP
net: thunderx: Support for XDP header adjustment
net: thunderx: Add support for XDP_TX
net: thunderx: Add support for XDP_DROP
net: thunderx: Add basic XDP support
net: thunderx: Cleanup receive buffer allocation
net: thunderx: Optimize CQE_TX handling
net: thunderx: Optimize RBDR descriptor handling
net: thunderx: Support for page recycling
ipx: call ipxitf_put() in ioctl error path
net: sched: add helpers to handle extended actions
qed*: Fix issues in the ptp filter config implementation.
qede: Fix concurrency issue in PTP Tx path processing.
stmmac: Add support for SIMATIC IOT2000 platform
net: hns: fix ethtool_get_strings overflow in hns driver
tcp: fix wraparound issue in tcp_lp
bpf, arm64: fix jit branch offset related to ldimm64
bpf, arm64: implement jiting of BPF_XADD
... -
Pull documentation update from Jonathan Corbet:
"A reasonably busy cycle for documentation this time around. There is a
new guide for user-space API documents, rather sparsely populated at
the moment, but it's a start. Markus improved the infrastructure for
converting diagrams. Mauro has converted much of the USB documentation
over to RST. Plus the usual set of fixes, improvements, and tweaks.There's a bit more than the usual amount of reaching out of
Documentation/ to fix comments elsewhere in the tree; I have acks for
those where I could get them"* tag 'docs-4.12' of git://git.lwn.net/linux: (74 commits)
docs: Fix a couple typos
docs: Fix a spelling error in vfio-mediated-device.txt
docs: Fix a spelling error in ioctl-number.txt
MAINTAINERS: update file entry for HSI subsystem
Documentation: allow installing man pages to a user defined directory
Doc/PM: Sync with intel_powerclamp code behavior
zr364xx.rst: usb/devices is now at /sys/kernel/debug/
usb.rst: move documentation from proc_usb_info.txt to USB ReST book
convert philips.txt to ReST and add to media docs
docs-rst: usb: update old usbfs-related documentation
arm: Documentation: update a path name
docs: process/4.Coding.rst: Fix a couple of document refs
docs-rst: fix usb cross-references
usb: gadget.h: be consistent at kernel doc macros
usb: composite.h: fix two warnings when building docs
usb: get rid of some ReST doc build errors
usb.rst: get rid of some Sphinx errors
usb/URB.txt: convert to ReST and update it
usb/persist.txt: convert to ReST and add to driver-api book
usb/hotplug.txt: convert to ReST and add to driver-api book
...
02 May, 2017
1 commit
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Pull uaccess unification updates from Al Viro:
"This is the uaccess unification pile. It's _not_ the end of uaccess
work, but the next batch of that will go into the next cycle. This one
mostly takes copy_from_user() and friends out of arch/* and gets the
zero-padding behaviour in sync for all architectures.Dealing with the nocache/writethrough mess is for the next cycle;
fortunately, that's x86-only. Same for cleanups in iov_iter.c (I am
sold on access_ok() in there, BTW; just not in this pile), same for
reducing __copy_... callsites, strn*... stuff, etc. - there will be a
pile about as large as this one in the next merge window.This one sat in -next for weeks. -3KLoC"
* 'work.uaccess' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (96 commits)
HAVE_ARCH_HARDENED_USERCOPY is unconditional now
CONFIG_ARCH_HAS_RAW_COPY_USER is unconditional now
m32r: switch to RAW_COPY_USER
hexagon: switch to RAW_COPY_USER
microblaze: switch to RAW_COPY_USER
get rid of padding, switch to RAW_COPY_USER
ia64: get rid of copy_in_user()
ia64: sanitize __access_ok()
ia64: get rid of 'segment' argument of __do_{get,put}_user()
ia64: get rid of 'segment' argument of __{get,put}_user_check()
ia64: add extable.h
powerpc: get rid of zeroing, switch to RAW_COPY_USER
esas2r: don't open-code memdup_user()
alpha: fix stack smashing in old_adjtimex(2)
don't open-code kernel_setsockopt()
mips: switch to RAW_COPY_USER
mips: get rid of tail-zeroing in primitives
mips: make copy_from_user() zero tail explicitly
mips: clean and reorder the forest of macros...
mips: consolidate __invoke_... wrappers
...
27 Apr, 2017
2 commits
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simple_fill_super() is passed an array of tree_descr structures which
describe the files to create in the filesystem's root directory. Since
these arrays are never modified intentionally, they should be 'const' so
that they are placed in .rodata and benefit from memory protection.
This patch updates the function signature and all users, and also
constifies tree_descr.name.Signed-off-by: Eric Biggers
Signed-off-by: Al Viro -
Signed-off-by: Al Viro
22 Apr, 2017
1 commit
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Both conflict were simple overlapping changes.
In the kaweth case, Eric Dumazet's skb_cow() bug fix overlapped the
conversion of the driver in net-next to use in-netdev stats.Signed-off-by: David S. Miller
19 Apr, 2017
3 commits
18 Apr, 2017
4 commits
-
This fixes CVE-2017-7472.
Running the following program as an unprivileged user exhausts kernel
memory by leaking thread keyrings:#include
int main()
{
for (;;)
keyctl_set_reqkey_keyring(KEY_REQKEY_DEFL_THREAD_KEYRING);
}Fix it by only creating a new thread keyring if there wasn't one before.
To make things more consistent, make install_thread_keyring_to_cred()
and install_process_keyring_to_cred() both return 0 if the corresponding
keyring is already present.Fixes: d84f4f992cbd ("CRED: Inaugurate COW credentials")
Cc: stable@vger.kernel.org # 2.6.29+
Signed-off-by: Eric Biggers
Signed-off-by: David Howells -
This fixes CVE-2017-6951.
Userspace should not be able to do things with the "dead" key type as it
doesn't have some of the helper functions set upon it that the kernel
needs. Attempting to use it may cause the kernel to crash.Fix this by changing the name of the type to ".dead" so that it's rejected
up front on userspace syscalls by key_get_type_from_user().Though this doesn't seem to affect recent kernels, it does affect older
ones, certainly those prior to:commit c06cfb08b88dfbe13be44a69ae2fdc3a7c902d81
Author: David Howells
Date: Tue Sep 16 17:36:06 2014 +0100
KEYS: Remove key_type::match in favour of overriding default by match_preparsewhich went in before 3.18-rc1.
Signed-off-by: David Howells
cc: stable@vger.kernel.org -
This fixes CVE-2016-9604.
Keyrings whose name begin with a '.' are special internal keyrings and so
userspace isn't allowed to create keyrings by this name to prevent
shadowing. However, the patch that added the guard didn't fix
KEYCTL_JOIN_SESSION_KEYRING. Not only can that create dot-named keyrings,
it can also subscribe to them as a session keyring if they grant SEARCH
permission to the user.This, for example, allows a root process to set .builtin_trusted_keys as
its session keyring, at which point it has full access because now the
possessor permissions are added. This permits root to add extra public
keys, thereby bypassing module verification.This also affects kexec and IMA.
This can be tested by (as root):
keyctl session .builtin_trusted_keys
keyctl add user a a @s
keyctl list @swhich on my test box gives me:
2 keys in keyring:
180010936: ---lswrv 0 0 asymmetric: Build time autogenerated kernel key: ae3d4a31b82daa8e1a75b49dc2bba949fd992a05
801382539: --alswrv 0 0 user: aFix this by rejecting names beginning with a '.' in the keyctl.
Signed-off-by: David Howells
Acked-by: Mimi Zohar
cc: linux-ima-devel@lists.sourceforge.net
cc: stable@vger.kernel.org -
…dhowells/linux-fs into next
12 Apr, 2017
1 commit
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Select CONFIG_CRYPTO in addition to CONFIG_HASH to ensure that
also CONFIG_HASH2 is selected. Both are needed for the shash
cipher support required for the KDF operation.Signed-off-by: Stephan Mueller
Signed-off-by: David Howells
07 Apr, 2017
6 commits
-
The path_max parameter determines the max size of buffers allocated
but it should not be setable at run time. If can be used to cause an
oopsroot@ubuntu:~# echo 16777216 > /sys/module/apparmor/parameters/path_max
root@ubuntu:~# cat /sys/module/apparmor/parameters/path_max
Killed[ 122.141911] BUG: unable to handle kernel paging request at ffff880080945fff
[ 122.143497] IP: [] d_absolute_path+0x44/0xa0
[ 122.144742] PGD 220c067 PUD 0
[ 122.145453] Oops: 0002 [#1] SMP
[ 122.146204] Modules linked in: vmw_vsock_vmci_transport vsock ppdev vmw_balloon snd_ens1371 btusb snd_ac97_codec gameport snd_rawmidi btrtl snd_seq_device ac97_bus btbcm btintel snd_pcm input_leds bluetooth snd_timer snd joydev soundcore serio_raw coretemp shpchp nfit parport_pc i2c_piix4 8250_fintek vmw_vmci parport mac_hid ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear hid_generic usbhid hid crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd vmwgfx psmouse mptspi ttm mptscsih drm_kms_helper mptbase syscopyarea scsi_transport_spi sysfillrect
[ 122.163365] ahci sysimgblt e1000 fb_sys_fops libahci drm pata_acpi fjes
[ 122.164747] CPU: 3 PID: 1501 Comm: bash Not tainted 4.4.0-59-generic #80-Ubuntu
[ 122.166250] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 07/02/2015
[ 122.168611] task: ffff88003496aa00 ti: ffff880076474000 task.ti: ffff880076474000
[ 122.170018] RIP: 0010:[] [] d_absolute_path+0x44/0xa0
[ 122.171525] RSP: 0018:ffff880076477b90 EFLAGS: 00010206
[ 122.172462] RAX: ffff880080945fff RBX: 0000000000000000 RCX: 0000000001000000
[ 122.173709] RDX: 0000000000ffffff RSI: ffff880080946000 RDI: ffff8800348a1010
[ 122.174978] RBP: ffff880076477bb8 R08: ffff880076477c80 R09: 0000000000000000
[ 122.176227] R10: 00007ffffffff000 R11: ffff88007f946000 R12: ffff88007f946000
[ 122.177496] R13: ffff880076477c80 R14: ffff8800348a1010 R15: ffff8800348a2400
[ 122.178745] FS: 00007fd459eb4700(0000) GS:ffff88007b6c0000(0000) knlGS:0000000000000000
[ 122.180176] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 122.181186] CR2: ffff880080945fff CR3: 0000000073422000 CR4: 00000000001406e0
[ 122.182469] Stack:
[ 122.182843] 00ffffff00000001 ffff880080946000 0000000000000000 0000000000000000
[ 122.184409] 00000000570f789c ffff880076477c30 ffffffff81385671 ffff88007a2e7a58
[ 122.185810] 0000000000000000 ffff880076477c88 01000000008a1000 0000000000000000
[ 122.187231] Call Trace:
[ 122.187680] [] aa_path_name+0x81/0x370
[ 122.188637] [] profile_transition+0xbd/0xb80
[ 122.190181] [] ? zone_statistics+0x7c/0xa0
[ 122.191674] [] apparmor_bprm_set_creds+0x9b0/0xac0
[ 122.193288] [] ? ext4_xattr_get+0x81/0x220
[ 122.194793] [] ? ext4_xattr_security_get+0x1c/0x30
[ 122.196392] [] ? get_vfs_caps_from_disk+0x69/0x110
[ 122.198004] [] ? mnt_may_suid+0x3f/0x50
[ 122.199737] [] ? cap_bprm_set_creds+0xa3/0x600
[ 122.201377] [] security_bprm_set_creds+0x33/0x50
[ 122.203024] [] prepare_binprm+0x85/0x190
[ 122.204515] [] do_execveat_common.isra.33+0x485/0x710
[ 122.206200] [] SyS_execve+0x3a/0x50
[ 122.207615] [] stub_execve+0x5/0x5
[ 122.208978] [] ? entry_SYSCALL_64_fastpath+0x16/0x71
[ 122.210615] Code: f8 31 c0 48 63 c2 83 ea 01 48 c7 45 e8 00 00 00 00 48 01 c6 85 d2 48 c7 45 f0 00 00 00 00 48 89 75 e0 89 55 dc 78 0c 48 8d 46 ff 46 ff 00 48 89 45 e0 48 8d 55 e0 48 8d 4d dc 48 8d 75 e8 e8
[ 122.217320] RIP [] d_absolute_path+0x44/0xa0
[ 122.218860] RSP
[ 122.219919] CR2: ffff880080945fff
[ 122.220936] ---[ end trace 506cdbd85eb6c55e ]---Reported-by: Tetsuo Handa
Signed-off-by: John Johansen
Signed-off-by: James Morris -
Boot parameters are written before apparmor is ready to answer whether
the user is policy_view_capable(). Setting the parameters at boot results
in an oops and failure to boot. Setting the parameters at boot is
obviously allowed so skip the permission check when apparmor is not
initialized.While we are at it move the more complicated check to last.
Signed-off-by: John Johansen
Signed-off-by: James Morris -
Once the loop on lines 836-853 is complete and exits normally, ent is a
pointer to the dummy list head value. The derefernces accessible from eg
the goto fail on line 860 or the various goto fail_lock's afterwards thus
seem incorrect.Reported-by: Julia Lawall
Signed-off-by: John Johansen
Signed-off-by: James Morris -
When building the kernel with clang, the compiler fails to build
security/apparmor/crypto.c with the following error:security/apparmor/crypto.c:36:8: error: fields must have a constant
size: 'variable length array in structure' extension will never be
supported
char ctx[crypto_shash_descsize(apparmor_tfm)];
^Since commit a0a77af14117 ("crypto: LLVMLinux: Add macro to remove use
of VLAIS in crypto code"), include/crypto/hash.h defines
SHASH_DESC_ON_STACK to work around this issue. Use it in aa_calc_hash()
and aa_calc_profile_hash().Signed-off-by: Nicolas Iooss
Signed-off-by: John Johansen
Signed-off-by: James Morris -
Add the _APPARMOR substring to reference the intended Kconfig option.
Signed-off-by: Valentin Rothberg
Signed-off-by: John Johansen
Signed-off-by: James Morris -
security/apparmor/lib.c:132:9-10: WARNING: return of 0/1 in function 'aa_policy_init' with return type bool
Return statements in functions returning bool should use
true/false instead of 1/0.
Generated by: scripts/coccinelle/misc/boolreturn.cocciSigned-off-by: Fengguang Wu
Signed-off-by: John Johansen
Signed-off-by: James Morris
05 Apr, 2017
6 commits
-
Since all callers of smk_netlbl_mls() are GFP_KERNEL context
(smk_set_cipso() calls memdup_user_nul(), init_smk_fs() calls
__kernfs_new_node(), smk_import_entry() calls kzalloc(GFP_KERNEL)),
it is safe to use GFP_KERNEL from netlbl_catmap_setbit().Signed-off-by: Tetsuo Handa
Signed-off-by: Casey Schaufler -
smack_parse_opts_str() calls kfree(opts->mnt_opts) when kcalloc() for
opts->mnt_opts_flags failed. But it should not have called it because
security_free_mnt_opts() will call kfree(opts->mnt_opts).Signed-off-by: Tetsuo Handa
Signed-off-by: Casey Schaufler
fixes: 3bf2789cad9e6573 ("smack: allow mount opts setting over filesystems with binary mount data")
Cc: Vivek Trivedi
Cc: Amit Sahrawat
Cc: Casey Schaufler -
SP800-56A defines the use of DH with key derivation function based on a
counter. The input to the KDF is defined as (DH shared secret || other
information). The value for the "other information" is to be provided by
the caller.The KDF is implemented using the hash support from the kernel crypto API.
The implementation uses the symmetric hash support as the input to the
hash operation is usually very small. The caller is allowed to specify
the hash name that he wants to use to derive the key material allowing
the use of all supported hashes provided with the kernel crypto API.As the KDF implements the proper truncation of the DH shared secret to
the requested size, this patch fills the caller buffer up to its size.The patch is tested with a new test added to the keyutils user space
code which uses a CAVS test vector testing the compliance with
SP800-56A.Signed-off-by: Stephan Mueller
Signed-off-by: David Howells -
Keyrings recently gained restrict_link capabilities that allow
individual keys to be validated prior to linking. This functionality
was only available using internal kernel APIs.With the KEYCTL_RESTRICT_KEYRING command existing keyrings can be
configured to check the content of keys before they are linked, and
then allow or disallow linkage of that key to the keyring.To restrict a keyring, call:
keyctl(KEYCTL_RESTRICT_KEYRING, key_serial_t keyring, const char *type,
const char *restriction)where 'type' is the name of a registered key type and 'restriction' is a
string describing how key linkage is to be restricted. The restriction
option syntax is specific to each key type.Signed-off-by: Mat Martineau
-
The keyring restrict callback was sometimes called before
__key_link_begin and sometimes after, which meant that the keyring
semaphores were not always held during the restrict callback.If the semaphores are consistently acquired before checking link
restrictions, keyring contents cannot be changed after the restrict
check is complete but before the evaluated key is linked to the keyring.Signed-off-by: Mat Martineau
-
Replace struct key's restrict_link function pointer with a pointer to
the new struct key_restriction. The structure contains pointers to the
restriction function as well as relevant data for evaluating the
restriction.The garbage collector checks restrict_link->keytype when key types are
unregistered. Restrictions involving a removed key type are converted
to use restrict_link_reject so that restrictions cannot be removed by
unregistering key types.Signed-off-by: Mat Martineau
04 Apr, 2017
2 commits
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The first argument to the restrict_link_func_t functions was a keyring
pointer. These functions are called by the key subsystem with this
argument set to the destination keyring, but restrict_link_by_signature
expects a pointer to the relevant trusted keyring.Restrict functions may need something other than a single struct key
pointer to allow or reject key linkage, so the data used to make that
decision (such as the trust keyring) is moved to a new, fourth
argument. The first argument is now always the destination keyring.Signed-off-by: Mat Martineau
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This pointer type needs to be returned from a lookup function, and
without a typedef the syntax gets cumbersome.Signed-off-by: Mat Martineau
03 Apr, 2017
3 commits
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refcount_t type and corresponding API should be
used instead of atomic_t when the variable is used as
a reference counter. This allows to avoid accidental
refcounter overflows that might lead to use-after-free
situations.Signed-off-by: Elena Reshetova
Signed-off-by: Hans Liljestrand
Signed-off-by: Kees Cook
Signed-off-by: David Windsor
Acked-by: David Howells
Signed-off-by: James Morris -
refcount_t type and corresponding API should be
used instead of atomic_t when the variable is used as
a reference counter. This allows to avoid accidental
refcounter overflows that might lead to use-after-free
situations.Signed-off-by: Elena Reshetova
Signed-off-by: Hans Liljestrand
Signed-off-by: Kees Cook
Signed-off-by: David Windsor
Acked-by: David Howells
Signed-off-by: James Morris -
./lib/string.c:134: WARNING: Inline emphasis start-string without end-string.
./mm/filemap.c:522: WARNING: Inline interpreted text or phrase reference start-string without end-string.
./mm/filemap.c:1283: ERROR: Unexpected indentation.
./mm/filemap.c:3003: WARNING: Inline interpreted text or phrase reference start-string without end-string.
./mm/vmalloc.c:1544: WARNING: Inline emphasis start-string without end-string.
./mm/page_alloc.c:4245: ERROR: Unexpected indentation.
./ipc/util.c:676: ERROR: Unexpected indentation.
./drivers/pci/irq.c:35: WARNING: Block quote ends without a blank line; unexpected unindent.
./security/security.c:109: ERROR: Unexpected indentation.
./security/security.c:110: WARNING: Definition list ends without a blank line; unexpected unindent.
./block/genhd.c:275: WARNING: Inline strong start-string without end-string.
./block/genhd.c:283: WARNING: Inline strong start-string without end-string.
./include/linux/clk.h:134: WARNING: Inline emphasis start-string without end-string.
./include/linux/clk.h:134: WARNING: Inline emphasis start-string without end-string.
./ipc/util.c:477: ERROR: Unknown target name: "s".Signed-off-by: Mauro Carvalho Chehab
Acked-by: Bjorn Helgaas
Signed-off-by: Jonathan Corbet
01 Apr, 2017
1 commit
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We removed this initialization as a cleanup but it is probably required.
The concern is that "nel" can be zero. I'm not an expert on SELinux
code but I think it looks possible to write an SELinux policy which
triggers this bug. GCC doesn't catch this, but my static checker does.Fixes: 9c312e79d6af ("selinux: Delete an unnecessary variable initialisation in range_read()")
Signed-off-by: Dan Carpenter
Acked-by: Stephen Smalley
Signed-off-by: Paul Moore
30 Mar, 2017
2 commits
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Prepare to mark sensitive kernel structures for randomization by making
sure they're using designated initializers. These were identified during
allyesconfig builds of x86, arm, and arm64, with most initializer fixes
extracted from grsecurity.Signed-off-by: Kees Cook
Acked-by: Tetsuo Handa
Signed-off-by: James Morris -
'perms' will never be NULL since it isn't a plain pointer but an array
of u32 values.This fixes the following warning when building with clang:
security/selinux/ss/services.c:158:16: error: address of array
'p_in->perms' will always evaluate to 'true'
[-Werror,-Wpointer-bool-conversion]
while (p_in->perms && p_in->perms[k]) {Signed-off-by: Matthias Kaehlcke
Signed-off-by: Paul Moore
29 Mar, 2017
1 commit
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A string which did not contain data format specifications should be put
into a sequence. Thus use the corresponding function "seq_puts".This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring
Signed-off-by: Paul Moore
