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tracing: Fix double free when function profile init failed
author
Namhyung Kim
<namhyung.kim@lge.com>
Mon, 1 Apr 2013 12:46:23 +0000
(21:46 +0900)
committer
Ben Hutchings
<ben@decadent.org.uk>
Thu, 25 Apr 2013 19:25:36 +0000
(20:25 +0100)
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>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
kernel/trace/ftrace.c
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diff --git
a/kernel/trace/ftrace.c
b/kernel/trace/ftrace.c
index
1b378d0
..
bed7991
100644
(file)
--- a/
kernel/trace/ftrace.c
+++ b/
kernel/trace/ftrace.c
@@
-572,7
+572,6
@@
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;