WSL2-Linux-Kernel/security/apparmor
Vegard Nossum 30a46a4647 apparmor: fix oops, validate buffer size in apparmor_setprocattr()
When proc_pid_attr_write() was changed to use memdup_user apparmor's
(interface violating) assumption that the setprocattr buffer was always
a single page was violated.

The size test is not strictly speaking needed as proc_pid_attr_write()
will reject anything larger, but for the sake of robustness we can keep
it in.

SMACK and SELinux look safe to me, but somebody else should probably
have a look just in case.

Based on original patch from Vegard Nossum <vegard.nossum@oracle.com>
modified for the case that apparmor provides null termination.

Fixes: bb646cdb12
Reported-by: Vegard Nossum <vegard.nossum@oracle.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: John Johansen <john.johansen@canonical.com>
Cc: Paul Moore <paul@paul-moore.com>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: Eric Paris <eparis@parisplace.org>
Cc: Casey Schaufler <casey@schaufler-ca.com>
Cc: stable@kernel.org
Signed-off-by: John Johansen <john.johansen@canonical.com>
Reviewed-by: Tyler Hicks <tyhicks@canonical.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
2016-07-08 10:26:25 +10:00
..
include apparmor: constify aa_path_link() 2016-03-28 00:47:26 -04:00
.gitignore AppArmor: remove af_names.h from .gitignore 2012-09-01 08:35:34 -07:00
Kconfig apparmor: clarify CRYPTO dependency 2015-10-22 11:11:28 +11:00
Makefile apparmor: add the ability to report a sha1 hash of loaded policy 2013-08-14 11:42:08 -07:00
apparmorfs.c VFS: security/: d_inode() annotations 2015-04-15 15:06:57 -04:00
audit.c apparmor: remove parent task info from audit logging 2013-10-29 21:34:04 -07:00
capability.c apparmor: fix capability to not use the current task, during reporting 2013-10-29 21:33:37 -07:00
context.c apparmor: change how profile replacement update is done 2013-08-14 11:42:06 -07:00
crypto.c apparmor: Use shash crypto API interface for profile hashes 2013-09-30 09:53:59 +10:00
domain.c LSM: Switch to lists of hooks 2015-05-12 15:00:41 +10:00
file.c apparmor: constify aa_path_link() 2016-03-28 00:47:26 -04:00
ipc.c apparmor: fix capability to not use the current task, during reporting 2013-10-29 21:33:37 -07:00
lib.c nick kvfree() from apparmor 2014-05-06 14:02:53 -04:00
lsm.c apparmor: fix oops, validate buffer size in apparmor_setprocattr() 2016-07-08 10:26:25 +10:00
match.c apparmor: reserve and mask off the top 8 bits of the base field 2013-04-28 00:37:32 -07:00
path.c [apparmor] constify struct path * in a bunch of helpers 2016-03-27 23:48:14 -04:00
policy.c apparmor: fix memleak of the profile hash 2013-10-16 11:53:59 +11:00
policy_unpack.c apparmor: add the ability to report a sha1 hash of loaded policy 2013-08-14 11:42:08 -07:00
procattr.c apparmor: add interface files for profiles and namespaces 2013-08-14 11:42:07 -07:00
resource.c apparmor: relax the restrictions on setting rlimits 2013-04-28 00:36:46 -07:00
sid.c AppArmor: core policy routines 2010-08-02 15:38:37 +10:00