This is a note to let you know that I've just added the patch titled
audit: don't WARN_ON_ONCE(!current->mm) in audit_exe_compare()
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
audit-don-t-warn_on_once-current-mm-in-audit_exe_compare.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 969d90ec212bae4b45bf9d21d7daa30aa6cf055e Mon Sep 17 00:00:00 2001
From: Paul Moore <paul@xxxxxxxxxxxxxx>
Date: Tue, 14 Nov 2023 17:25:48 -0500
Subject: audit: don't WARN_ON_ONCE(!current->mm) in audit_exe_compare()
From: Paul Moore <paul@xxxxxxxxxxxxxx>
commit 969d90ec212bae4b45bf9d21d7daa30aa6cf055e upstream.
eBPF can end up calling into the audit code from some odd places, and
some of these places don't have @current set properly so we end up
tripping the `WARN_ON_ONCE(!current->mm)` near the top of
`audit_exe_compare()`. While the basic `!current->mm` check is good,
the `WARN_ON_ONCE()` results in some scary console messages so let's
drop that and just do the regular `!current->mm` check to avoid
problems.
Cc: <stable@xxxxxxxxxxxxxxx>
Fixes: 47846d51348d ("audit: don't take task_lock() in audit_exe_compare() code path")
Reported-by: Artem Savkov <asavkov@xxxxxxxxxx>
Signed-off-by: Paul Moore <paul@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/audit_watch.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/audit_watch.c
+++ b/kernel/audit_watch.c
@@ -531,7 +531,7 @@ int audit_exe_compare(struct task_struct
if (tsk != current)
return 0;
- if (WARN_ON_ONCE(!current->mm))
+ if (!current->mm)
return 0;
exe_file = get_mm_exe_file(current->mm);
if (!exe_file)
Patches currently in stable-queue which might be from paul@xxxxxxxxxxxxxx are
queue-6.6/audit-don-t-warn_on_once-current-mm-in-audit_exe_compare.patch
queue-6.6/audit-don-t-take-task_lock-in-audit_exe_compare-code-path.patch
