| From bde6b2923bf00a5de145a83b98f36a12ce96c5fd Mon Sep 17 00:00:00 2001 |
| From: Namhyung Kim <namhyung.kim@lge.com> |
| Date: Mon, 1 Apr 2013 21:46:23 +0900 |
| Subject: [PATCH] tracing: Fix double free when function profile init failed |
| |
| commit 83e03b3fe4daffdebbb42151d5410d730ae50bd1 upstream. |
| |
| 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> |
| Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> |
| --- |
| kernel/trace/ftrace.c | 1 - |
| 1 file changed, 1 deletion(-) |
| |
| diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c |
| index 7dd746cc86ff..337f928749c7 100644 |
| --- a/kernel/trace/ftrace.c |
| +++ b/kernel/trace/ftrace.c |
| @@ -480,7 +480,6 @@ 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; |
| |
| -- |
| 1.8.5.2 |
| |