From: Al Viro <viro@zeniv.linux.org.uk>
Date: Tue, 3 Apr 2018 03:50:31 +0000 (-0400)
Subject: hypfs_kill_super(): deal with failed allocations
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=bb5def77d0a1e41b53f7049fdb0f640408194068;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

hypfs_kill_super(): deal with failed allocations

commit a24cd490739586a7d2da3549a1844e1d7c4f4fc4 upstream.

hypfs_fill_super() might fail to allocate sbi; hypfs_kill_super()
should not oops on that.

Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/arch/s390/hypfs/inode.c b/arch/s390/hypfs/inode.c
index cf8a2d92467f..45eb5999110b 100644
--- a/arch/s390/hypfs/inode.c
+++ b/arch/s390/hypfs/inode.c
@@ -320,7 +320,7 @@ static void hypfs_kill_super(struct super_block *sb)
 
 	if (sb->s_root)
 		hypfs_delete_tree(sb->s_root);
-	if (sb_info->update_file)
+	if (sb_info && sb_info->update_file)
 		hypfs_remove(sb_info->update_file);
 	kfree(sb->s_fs_info);
 	sb->s_fs_info = NULL;