From c66b23c2840446a82c389e4cb1a12eb2a71fa2e4 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Mon, 2 Apr 2018 23:56:44 -0400
Subject: [PATCH] jffs2_kill_sb(): deal with failed allocations
Git-commit: c66b23c2840446a82c389e4cb1a12eb2a71fa2e4
Patch-mainline: v4.17-rc2
References: bsc#1052766

jffs2_fill_super() might fail to allocate jffs2_sb_info;
jffs2_kill_sb() must survive that.

Cc: stable@kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Acked-by: Jan Kara <jack@suse.cz>

---
 fs/jffs2/super.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -342,7 +342,7 @@ static void jffs2_put_super (struct supe
 static void jffs2_kill_sb(struct super_block *sb)
 {
 	struct jffs2_sb_info *c = JFFS2_SB_INFO(sb);
-	if (!(sb->s_flags & MS_RDONLY))
+	if (c && !(sb->s_flags & MS_RDONLY))
 		jffs2_stop_garbage_collect_thread(c);
 	kill_mtd_super(sb);
 	kfree(c);