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authorThomas Gleixner <tglx@linutronix.de>2016-02-17 01:04:41 +0300
committerIngo Molnar <mingo@kernel.org>2016-02-17 10:36:09 +0300
commit8bc9162cd2bf37036c486b384ac445b59b334b04 (patch)
treec2a9c71c53b0b5916c592b2d125ca4121fc5f9b3 /arch
parent65c23c65bee479faceb042a52f5a7278dfa8d972 (diff)
downloadlinux-8bc9162cd2bf37036c486b384ac445b59b334b04.tar.xz
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>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/cpu/perf_event_amd_uncore.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/perf_event_amd_uncore.c b/arch/x86/kernel/cpu/perf_event_amd_uncore.c
index 49742746a6c9..8836fc9fa84b 100644
--- a/arch/x86/kernel/cpu/perf_event_amd_uncore.c
+++ b/arch/x86/kernel/cpu/perf_event_amd_uncore.c
@@ -323,6 +323,8 @@ static int amd_uncore_cpu_up_prepare(unsigned int cpu)
return 0;
fail:
+ if (amd_uncore_nb)
+ *per_cpu_ptr(amd_uncore_nb, cpu) = NULL;
kfree(uncore_nb);
return -ENOMEM;
}