Linux 3.8.8

[thirdparty/kernel/stable-queue.git] / releases / 3.8.8 / tracing-fix-double-free-when-function-profile-init-failed.patch

diff --git a/releases/3.8.8/tracing-fix-double-free-when-function-profile-init-failed.patch b/releases/3.8.8/tracing-fix-double-free-when-function-profile-init-failed.patch
new file mode 100644 (file)
index 0000000..792c888
--- /dev/null
+++ b/releases/3.8.8/tracing-fix-double-free-when-function-profile-init-failed.patch
@@ -0,0 +1,34 @@
+From 83e03b3fe4daffdebbb42151d5410d730ae50bd1 Mon Sep 17 00:00:00 2001
+From: Namhyung Kim <namhyung.kim@lge.com>
+Date: Mon, 1 Apr 2013 21:46:23 +0900
+Subject: tracing: Fix double free when function profile init failed
+
+From: Namhyung Kim <namhyung.kim@lge.com>
+
+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
+
+Signed-off-by: Namhyung Kim <namhyung@kernel.org>
+Cc: Frederic Weisbecker <fweisbec@gmail.com>
+Cc: Namhyung Kim <namhyung.kim@lge.com>
+Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+---
+ 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;
+