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| author | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2021-11-26 17:34:42 -0500 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2021-11-26 17:37:06 -0500 |
| commit | a55f224ff5f238013de8762c4287117e47b86e22 (patch) | |
| tree | b1c3427dd94738944c3de54ff1d82954b8b66a33 /kernel | |
| parent | 6cb206508b621a9a0a2c35b60540e399225c8243 (diff) | |
| download | lwn-a55f224ff5f238013de8762c4287117e47b86e22.tar.gz lwn-a55f224ff5f238013de8762c4287117e47b86e22.zip | |
tracing: Fix pid filtering when triggers are attached
If a event is filtered by pid and a trigger that requires processing of
the event to happen is a attached to the event, the discard portion does
not take the pid filtering into account, and the event will then be
recorded when it should not have been.
Cc: stable@vger.kernel.org
Fixes: 3fdaf80f4a836 ("tracing: Implement event pid filtering")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace.h | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 6b60ab9475ed..38715aa6cfdf 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -1366,14 +1366,26 @@ __event_trigger_test_discard(struct trace_event_file *file, if (eflags & EVENT_FILE_FL_TRIGGER_COND) *tt = event_triggers_call(file, buffer, entry, event); - if (test_bit(EVENT_FILE_FL_SOFT_DISABLED_BIT, &file->flags) || - (unlikely(file->flags & EVENT_FILE_FL_FILTERED) && - !filter_match_preds(file->filter, entry))) { - __trace_event_discard_commit(buffer, event); - return true; - } + if (likely(!(file->flags & (EVENT_FILE_FL_SOFT_DISABLED | + EVENT_FILE_FL_FILTERED | + EVENT_FILE_FL_PID_FILTER)))) + return false; + + if (file->flags & EVENT_FILE_FL_SOFT_DISABLED) + goto discard; + + if (file->flags & EVENT_FILE_FL_FILTERED && + !filter_match_preds(file->filter, entry)) + goto discard; + + if ((file->flags & EVENT_FILE_FL_PID_FILTER) && + trace_event_ignore_this_pid(file)) + goto discard; return false; + discard: + __trace_event_discard_commit(buffer, event); + return true; } /** |