4.19-stable review patch. If anyone has any objections, please let me know.
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From: Paul Moore paul@paul-moore.com
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 --- kernel/audit_watch.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/kernel/audit_watch.c +++ b/kernel/audit_watch.c @@ -561,7 +561,7 @@ 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)