tracing: Don't dereference trace_event_file in deferred trigger free

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The enable_event trigger defers trace_event_put_ref() to the
trigger free kthread, but the trace_event_file can already be freed
when the instance is removed.

Keep the trace_event_call directly in enable_trigger_data so the
deferred free does not access the freed trace_event_file.

Cc: stable@vger.kernel.org
Fixes: e091351b38 ("tracing: Delay module ref count for "enable_event" trigger")
Reported-by: Alexander Gordeev <agordeev@linux.ibm.com>
Closes: https://lore.kernel.org/all/20260828134340.2501683A24-agordeev@linux.ibm.com/
Link: https://patch.msgid.link/20260911155650.354844-1-aliamemis@disroot.org
Signed-off-by: Ali Ahmet Memiş <aliamemis@disroot.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

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This commit is contained in:

Ali Ahmet Memiş 2026-09-11 18:56:47 +03:00 • committed by Steven Rostedt

parent b4dcc18b97

commit bcfe2816e6

2 changed files with 4 additions and 1 deletions

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1

kernel/trace/trace.h

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4

kernel/trace/trace_events_trigger.c

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