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audit: don't WARN_ON_ONCE(!current->mm) in audit_exe_compare() 

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@vger.kernel.org>
Fixes: 47846d51348d ("audit: don't take task_lock() in audit_exe_compare() code path")
Reported-by: Artem Savkov <asavkov@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Paul Moore 2023-11-14 17:25:48 -05:00 committed by Greg Kroah-Hartman
parent a2a2a2a51b
commit d567eb7366
1 changed files with 1 additions and 1 deletions
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2
kernel/audit_watch.c
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@ -531,7 +531,7 @@ int audit_exe_compare(struct task_struct *tsk, struct audit_fsnotify_mark *mark)
if (tsk != current) if (tsk != current)
return 0; return 0;
if (WARN_ON_ONCE(!current->mm)) if (!current->mm)
return 0; return 0;
exe_file = get_mm_exe_file(current->mm); exe_file = get_mm_exe_file(current->mm);
if (!exe_file) if (!exe_file)