audit: return on memory error to avoid null pointer dereference
commit699c079ae22ba91286a0c21cf40c24af2d4c409a
authorRichard Guy Briggs <rgb@redhat.com>
Wed, 21 Feb 2018 09:30:07 +0000 (21 04:30 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 30 May 2018 05:49:16 +0000 (30 07:49 +0200)
tree0cafb63119aa6a8be5e9eb194daca9789fb460b4
parent76b8865f976d70292b65a6ee0062f545e246307c
audit: return on memory error to avoid null pointer dereference

[ Upstream commit 23138ead270045f1b3e912e667967b6094244999 ]

If there is a memory allocation error when trying to change an audit
kernel feature value, the ignored allocation error will trigger a NULL
pointer dereference oops on subsequent use of that pointer.  Return
instead.

Passes audit-testsuite.
See: https://github.com/linux-audit/audit-kernel/issues/76

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
[PM: not necessary (other funcs check for NULL), but a good practice]
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
kernel/audit.c