Commits
Peter Zijlstra committed ccd41c86ad4
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>