tracing: Add checks if tr->buffer is NULL in tracing_reset{_online_cpus}

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max_tr->buffer could be NULL in the tracing_reset{_online_cpus}. In this
case, a NULL pointer dereference happens, so we should return immediately
from these functions.

Note, the current code does not call tracing_reset*() with max_tr when
its buffer is NULL, but future code will. This patch is needed to prevent
the future code from crashing.

Link: http://lkml.kernel.org/r/20121219070234.31200.93863.stgit@liselsia

Signed-off-by: Hiraku Toyooka <hiraku.toyooka.gu@hitachi.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

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Hiraku Toyooka 2012-12-19 16:02:34 +09:00 • committed by Steven Rostedt

parent 6aea49cb5f

commit a54164114b

1 changed files with 6 additions and 0 deletions

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kernel/trace/trace.c

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