diff options
| author | zhangwei(Jovi) <jovi.zhangwei@huawei.com> | 2014-04-17 16:05:19 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-05-31 13:20:29 -0700 |
| commit | ff3db3fa612bedd7fa2c6ed3f32f850929f2c7d7 (patch) | |
| tree | 5e7d856faed46a3d4d8d51ebf30d99f125aa2878 /kernel | |
| parent | 0aa769c91d405d6bee480513ae490fe1360e74ae (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; } |