| From | Ben Hutchings <> | Date | Mon, 22 Apr 2013 15:25:59 +0100 | Subject | [33/75] tracing: Fix double free when function profile init failed |
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3.2.44-rc1 review patch. If anyone has any objections, please let me know.
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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
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 | 1 - 1 file changed, 1 deletion(-)
--- a/kernel/trace/ftrace.c +++ b/kernel/trace/ftrace.c @@ -572,7 +572,6 @@ int ftrace_profile_pages_init(struct ftr free_page(tmp); } - free_page((unsigned long)stat->pages); stat->pages = NULL; stat->start = NULL;
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