From 4fc931199989617970eee431af17bdc36d39dddd Mon Sep 17 00:00:00 2001
From: Oleg Nesterov <oleg@redhat.com>
Date: Fri, 28 Jun 2013 09:53:53 +1000
Subject: [PATCH] coredump: avoid the uninitialized cn->corename if
 core_pattern is empty

If core_pattern is "" or "|", cn->corename is used uninitialized by
filp_open() or call_usermodehelper_exec().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Colin Walters <walters@verbum.org>
Cc: Denys Vlasenko <vda.linux@googlemail.com>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: Lennart Poettering <mzxreary@0pointer.de>
Cc: Lucas De Marchi <lucas.de.marchi@gmail.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
 fs/coredump.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/coredump.c b/fs/coredump.c
index eefc415c75ce..fb4e2b7ea07b 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -165,6 +165,7 @@ static int format_corename(struct core_name *cn, struct coredump_params *cprm)
 	cn->corename = NULL;
 	if (expand_corename(cn, core_name_size))
 		return -ENOMEM;
+	cn->corename[0] = '\0';
 
 	if (ispipe)
 		++pat_ptr;
-- 
2.39.5