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perf/x86/amd/uncore: Plug reference leak 

In the error path of amd_uncore_cpu_up_prepare() the newly allocated uncore
struct is freed, but the percpu pointer still references it. Set it to NULL.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Link: http://lkml.kernel.org/r/alpine.DEB.2.11.1602162302170.19512@nanos
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Thomas Gleixner 2016-02-16 23:04:41 +01:00 committed by Ingo Molnar
parent 65c23c65be
commit 8bc9162cd2
1 changed files with 2 additions and 0 deletions
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2
arch/x86/kernel/cpu/perf_event_amd_uncore.c
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@ -323,6 +323,8 @@ static int amd_uncore_cpu_up_prepare(unsigned int cpu)
return 0; return 0;
fail: fail:
if (amd_uncore_nb)
*per_cpu_ptr(amd_uncore_nb, cpu) = NULL;
kfree(uncore_nb); kfree(uncore_nb);
return -ENOMEM; return -ENOMEM;
} }