[044/126] tracing: Fix double free when function profile init failed

Steven Rostedt
2013-05-07T04:03:57Z

[-- Attachment #1: 0044-tracing-Fix-double-free-when-function-profile-init-f.patch --]
[-- Type: text/plain, Size: 1069 bytes --]

3.6.11.3 stable review patch.
If anyone has any objections, please let me know.

------------------

From: Namhyung Kim <namhyung.kim@lge.com>

[ Upstream commit 83e03b3fe4daffdebbb42151d5410d730ae50bd1 ]

On the failure path, stat->start and stat->pages will refer same page.
So it'll attempt to free the same page again and get kernel panic.

Link: http://lkml.kernel.org/r/1364820385-32027-1-git-send-email-namhyung@kernel.org

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: stable@vger.kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
kernel/trace/ftrace.c | 1 -
1 file changed, 1 deletion(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index bef5ebc..a1dd715 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -642,7 +642,6 @@ int ftrace_profile_pages_init(struct ftrace_profile_stat *stat)
free_page(tmp);
}

- free_page((unsigned long)stat->pages);
stat->pages = NULL;
stat->start = NULL;

--
1.7.10.4