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Eric Biggers 57b0e31453 KEYS: fix parsing invalid pkey info string 
We need to check the return value of match_token() for Opt_err before
doing anything with it.

[ Not only did the old "-1" value for Opt_err cause problems for the
  __test_and_set_bit(), as fixed in commit 94c13f66e1 ("security:
  don't use a negative Opt_err token index"), but accessing
  "args[0].from" is invalid for the Opt_err case, as pointed out by Eric
  later.  - Linus ]

Reported-by: syzbot+a22e0dc07567662c50bc@syzkaller.appspotmail.com
Fixes: 00d60fd3b9 ("KEYS: Provide keyctls to drive the new key type ops for asymmetric keys [ver #2]")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Cc: stable@kernel.org # 4.20
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2019-01-01 13:13:19 -08:00
..
apparmor Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2018-12-27 13:53:32 -08:00
integrity Kconfig updates for v4.21 2018-12-29 13:03:29 -08:00
keys KEYS: fix parsing invalid pkey info string 2019-01-01 13:13:19 -08:00
loadpin LoadPin: Rename boot param "enabled" to "enforce" 2018-10-18 15:29:44 -07:00
selinux Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2018-12-27 13:04:52 -08:00
smack Merge branch 'next-smack' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security 2018-10-25 13:29:51 -07:00
tomoyo tomoyo: fix small typo 2018-11-05 08:50:11 -08:00
yama pids: introduce find_get_task_by_vpid() helper 2018-02-06 18:32:46 -08:00
Kconfig treewide: surround Kconfig file paths with double quotes 2018-12-22 00:25:54 +09:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
commoncap.c security: audit and remove any unnecessary uses of module.h 2018-12-12 14:58:51 -08:00
device_cgroup.c docs: fix broken references with multiple hints 2018-06-15 18:10:01 -03:00
inode.c security: fs: make inode explicitly non-modular 2018-12-12 14:58:51 -08:00
lsm_audit.c audit: use inline function to get audit context 2018-05-14 17:24:18 -04:00
min_addr.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
security.c security: audit and remove any unnecessary uses of module.h 2018-12-12 14:58:51 -08:00