selinux: fix a missing-check bug in selinux_add_mnt_opt( )
authorGen Zhang <blackgod016574@gmail.com>
Wed, 12 Jun 2019 13:28:21 +0000 (21:28 +0800)
committerPaul Moore <paul@paul-moore.com>
Wed, 12 Jun 2019 15:39:38 +0000 (11:39 -0400)
commite2e0e09758a6f7597de0f9b819647addfb71b6bd
tree49221a4e9f7f0c4dda4cd1502f42dce090695ef6
parentaff7ed4851680d0d28ad9f52cd2f99213e1371b2
selinux: fix a missing-check bug in selinux_add_mnt_opt( )

In selinux_add_mnt_opt(), 'val' is allocated by kmemdup_nul(). It returns
NULL when fails. So 'val' should be checked. And 'mnt_opts' should be
freed when error.

Signed-off-by: Gen Zhang <blackgod016574@gmail.com>
Fixes: 757cbe597fe8 ("LSM: new method: ->sb_add_mnt_opt()")
Cc: <stable@vger.kernel.org>
[PM: fixed some indenting problems]
Signed-off-by: Paul Moore <paul@paul-moore.com>
security/selinux/hooks.c