From: Thomas Gleixner Date: Tue, 16 Feb 2016 22:04:41 +0000 (+0100) Subject: perf/x86/amd/uncore: Plug reference leak X-Git-Tag: v5.15~14179^2~3 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=8bc9162cd2bf37036c486b384ac445b59b334b04;p=mirror_ubuntu-kernels.git 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 Cc: Arnaldo Carvalho de Melo Cc: Jiri Olsa Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Vince Weaver Link: http://lkml.kernel.org/r/alpine.DEB.2.11.1602162302170.19512@nanos Signed-off-by: Ingo Molnar --- 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; }