tracing/events: fix concurrent access to ftrace_events list, fix

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In filter_add_subsystem_pred() we should release event_mutex before
calling filter_free_subsystem_preds(), since both functions hold
event_mutex.

[ Impact: fix deadlock when writing invalid pred into subsystem filter ]

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: tzanussi@gmail.com
Cc: a.p.zijlstra@chello.nl
Cc: fweisbec@gmail.com
Cc: rostedt@goodmis.org
LKML-Reference: <4A028993.7020509@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

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Li Zefan 2009-05-07 15:11:15 +08:00 • committed by Ingo Molnar

parent 5928c3cc0f

commit d94fc523f3

1 changed files with 3 additions and 2 deletions

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kernel/trace/trace_events_filter.c

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