diff options
| author | zhangwei(Jovi) <jovi.zhangwei@huawei.com> | 2014-04-17 16:05:19 +0800 |
|---|---|---|
| committer | Show Liu <show.liu@linaro.org> | 2014-06-18 12:03:40 +0800 |
| commit | ae4979e0bbb9a8de03fbde62f2b00a49f00c197e (patch) | |
| tree | a0771f763fc0513d88a929030c06b40d892677bb /kernel | |
| parent | 8a856a502c2c36efe1841a4c30b8afc76aa3255c (diff) | |
tracing/uprobes: Fix uprobe_cpu_buffer memory leak
commit 6ea6215fe394e320468589d9bba464a48f6d823a upstream.
Forgot to free uprobe_cpu_buffer percpu page in uprobe_buffer_disable().
Link: http://lkml.kernel.org/p/534F8B3F.1090407@huawei.com
Acked-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@huawei.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace_uprobe.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/trace/trace_uprobe.c b/kernel/trace/trace_uprobe.c index 79e52d93860..bd0c9b133b5 100644 --- a/kernel/trace/trace_uprobe.c +++ b/kernel/trace/trace_uprobe.c @@ -728,9 +728,15 @@ 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; } |