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authorPeter Zijlstra <peterz@infradead.org>2015-02-25 15:56:04 +0100
committerIngo Molnar <mingo@kernel.org>2015-03-27 09:49:45 +0100
commitccd41c86ad4d464d0ed4e48d80759ff85c2115b0 (patch)
treeb53b1e7507761a9144f900eff6f97cd4bb6d15c5 /tools/perf/config
parent9332d250b4b4f67c633894b311e022e3cf943bd5 (diff)
downloadlinux-ccd41c86ad4d464d0ed4e48d80759ff85c2115b0.tar.gz
perf: Fix racy group access
While looking at some fuzzer output I noticed that we do not hold any locks on leader->ctx and therefore the sibling_list iteration is unsafe. Acquire the relevant ctx->mutex before calling into the pmu specific code. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Vince Weaver <vincent.weaver@maine.edu> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Sasha Levin <sasha.levin@oracle.com> Link: http://lkml.kernel.org/r/20150225151639.GL5029@twins.programming.kicks-ass.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
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