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Date: Wed, 20 Sep 2006 15:57:30 +0200
From: Martin Schwidefsky <schwidefsky@...ibm.com>
To: linux-kernel@...r.kernel.org, holzheu@...ibm.com
Subject: [S390] hypfs crashes with invalid mount option.
From: Michael Holzheu <holzheu@...ibm.com>
[S390] hypfs crashes with invalid mount option.
When an invalid mount option is specified, no root inode is created
for hypfs, hypfs_fill_super() returns with -EINVAL and then
hypfs_kill_super() is called. hypfs_kill_super() does not check if
the root inode has been initialized. This patch adds this check.
Signed-off-by: Michael Holzheu <holzheu@...ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@...ibm.com>
---
arch/s390/hypfs/inode.c | 10 ++++++----
1 files changed, 6 insertions(+), 4 deletions(-)
diff -urpN linux-2.6/arch/s390/hypfs/inode.c linux-2.6-patched/arch/s390/hypfs/inode.c
--- linux-2.6/arch/s390/hypfs/inode.c 2006-09-20 15:52:40.000000000 +0200
+++ linux-2.6-patched/arch/s390/hypfs/inode.c 2006-09-20 15:53:15.000000000 +0200
@@ -312,10 +312,12 @@ static void hypfs_kill_super(struct supe
{
struct hypfs_sb_info *sb_info = sb->s_fs_info;
- hypfs_delete_tree(sb->s_root);
- hypfs_remove(sb_info->update_file);
- kfree(sb->s_fs_info);
- sb->s_fs_info = NULL;
+ if (sb->s_root) {
+ hypfs_delete_tree(sb->s_root);
+ hypfs_remove(sb_info->update_file);
+ kfree(sb->s_fs_info);
+ sb->s_fs_info = NULL;
+ }
kill_litter_super(sb);
}
-
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