This is a note to let you know that I've just added the patch titled
tracing: Fix double free when function profile init failed
to the 3.8-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tracing-fix-double-free-when-function-profile-init-failed.patch
and it can be found in the queue-3.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 83e03b3fe4daffdebbb42151d5410d730ae50bd1 Mon Sep 17 00:00:00 2001
From: Namhyung Kim <[email protected]>
Date: Mon, 1 Apr 2013 21:46:23 +0900
Subject: tracing: Fix double free when function profile init failed
From: Namhyung Kim <[email protected]>
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/[email protected]
Signed-off-by: Namhyung Kim <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Namhyung Kim <[email protected]>
Signed-off-by: Steven Rostedt <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
kernel/trace/ftrace.c | 1 -
1 file changed, 1 deletion(-)
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -668,7 +668,6 @@ int ftrace_profile_pages_init(struct ftr
free_page(tmp);
}
- free_page((unsigned long)stat->pages);
stat->pages = NULL;
stat->start = NULL;
Patches currently in stable-queue which might be from [email protected] are
queue-3.8/tracing-fix-double-free-when-function-profile-init-failed.patch
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