tracing: Protect tracer flags with trace_types_lock

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Seems that the tracer flags have never been protected from
synchronous writes. Luckily, admins don't usually modify the
tracing flags via two different tasks. But if scripts were to
be used to modify them, then they could get corrupted.

Move the trace_types_lock that protects against tracers changing
to also protect the flags being set.

Cc: stable@vger.kernel.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

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Steven Rostedt (Red Hat) 2013-03-14 13:50:56 -04:00 • committed by Steven Rostedt

parent 740466bc89

commit 69d34da298

1 changed files with 8 additions and 4 deletions

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kernel/trace/trace.c

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