This is a note to let you know that I've just added the patch titled
audit: free audit_proctitle only on task exit
to the 6.0-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-free-audit_proctitle-only-on-task-exit.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 418a4fb1b4e176073669f8f508a456939a692254
Author: Richard Guy Briggs <rgb@xxxxxxxxxx>
Date: Thu Aug 25 15:32:39 2022 -0400
audit: free audit_proctitle only on task exit
[ Upstream commit c3f3ea8af44d0c5fba79fe8b198087342d0c7e04 ]
Since audit_proctitle is generated at syscall exit time, its value is
used immediately and cached for the next syscall. Since this is the
case, then only clear it at task exit time. Otherwise, there is no
point in caching the value OR bearing the overhead of regenerating it.
Fixes: 12c5e81d3fd0 ("audit: prepare audit_context for use in calling contexts beyond syscalls")
Signed-off-by: Richard Guy Briggs <rgb@xxxxxxxxxx>
Signed-off-by: Paul Moore <paul@xxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 0ee09447ad04..63a6fe99aa3a 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1016,7 +1016,6 @@ static void audit_reset_context(struct audit_context *ctx)
WARN_ON(!list_empty(&ctx->killed_trees));
audit_free_module(ctx);
ctx->fds[0] = -1;
- audit_proctitle_free(ctx);
ctx->type = 0; /* reset last for audit_free_*() */
}
@@ -1077,6 +1076,7 @@ static inline void audit_free_context(struct audit_context *context)
{
/* resetting is extra work, but it is likely just noise */
audit_reset_context(context);
+ audit_proctitle_free(context);
free_tree_refs(context);
kfree(context->filterkey);
kfree(context);
