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authorzhangwei(Jovi) <jovi.zhangwei@huawei.com>2014-04-17 16:05:19 +0800
committerSteven Rostedt <rostedt@goodmis.org>2014-04-17 10:44:42 -0400
commit6ea6215fe394e320468589d9bba464a48f6d823a (patch)
tree29c2c207b7fbba870b61708e7c717acadd4dbbb2 /kernel
parent5d6c97c55984b3b991400692f9e8568a702b93c0 (diff)
downloadlinux-6ea6215fe394e320468589d9bba464a48f6d823a.tar.gz
linux-6ea6215fe394e320468589d9bba464a48f6d823a.tar.xz
tracing/uprobes: Fix uprobe_cpu_buffer memory leak
Forgot to free uprobe_cpu_buffer percpu page in uprobe_buffer_disable(). Link: http://lkml.kernel.org/p/534F8B3F.1090407@huawei.com Cc: stable@vger.kernel.org # v3.14+ Acked-by: Namhyung Kim <namhyung@kernel.org> Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@huawei.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/trace/trace_uprobe.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c
index 930e514..c082a74 100644
--- a/kernel/trace/trace_uprobe.c
+++ b/kernel/trace/trace_uprobe.c
@@ -732,9 +732,15 @@ static int uprobe_buffer_enable(void)
static void uprobe_buffer_disable(void)
{
+ int cpu;
+
BUG_ON(!mutex_is_locked(&event_mutex));
if (--uprobe_buffer_refcnt == 0) {
+ for_each_possible_cpu(cpu)
+ free_page((unsigned long)per_cpu_ptr(uprobe_cpu_buffer,
+ cpu)->buf);
+
free_percpu(uprobe_cpu_buffer);
uprobe_cpu_buffer = NULL;
}