audit: return on memory error to avoid null pointer dereference
[ Upstream commit 23138ead27
]
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>
pull/10/head
parent
a548ba4de3
commit
4a856adf28
|
@ -1058,6 +1058,8 @@ static void audit_log_feature_change(int which, u32 old_feature, u32 new_feature
|
|||
return;
|
||||
|
||||
ab = audit_log_start(NULL, GFP_KERNEL, AUDIT_FEATURE_CHANGE);
|
||||
if (!ab)
|
||||
return;
|
||||
audit_log_task_info(ab, current);
|
||||
audit_log_format(ab, " feature=%s old=%u new=%u old_lock=%u new_lock=%u res=%d",
|
||||
audit_feature_names[which], !!old_feature, !!new_feature,
|
||||
|
|
Loading…
Reference in New Issue