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Message-Id: <20190929173655.10178-7-sashal@kernel.org>
Date: Sun, 29 Sep 2019 13:36:52 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: David Howells <dhowells@...hat.com>,
Martin Schwidefsky <schwidefsky@...ibm.com>,
Heiko Carstens <heiko.carstens@...ibm.com>,
linux-s390@...r.kernel.org, Al Viro <viro@...iv.linux.org.uk>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 4.4 7/9] hypfs: Fix error number left in struct pointer member
From: David Howells <dhowells@...hat.com>
[ Upstream commit b54c64f7adeb241423cd46598f458b5486b0375e ]
In hypfs_fill_super(), if hypfs_create_update_file() fails,
sbi->update_file is left holding an error number. This is passed to
hypfs_kill_super() which doesn't check for this.
Fix this by not setting sbi->update_value until after we've checked for
error.
Fixes: 24bbb1faf3f0 ("[PATCH] s390_hypfs filesystem")
Signed-off-by: David Howells <dhowells@...hat.com>
cc: Martin Schwidefsky <schwidefsky@...ibm.com>
cc: Heiko Carstens <heiko.carstens@...ibm.com>
cc: linux-s390@...r.kernel.org
Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
arch/s390/hypfs/inode.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/arch/s390/hypfs/inode.c b/arch/s390/hypfs/inode.c
index c670279b33f0c..1de3fdfc35378 100644
--- a/arch/s390/hypfs/inode.c
+++ b/arch/s390/hypfs/inode.c
@@ -267,7 +267,7 @@ static int hypfs_show_options(struct seq_file *s, struct dentry *root)
static int hypfs_fill_super(struct super_block *sb, void *data, int silent)
{
struct inode *root_inode;
- struct dentry *root_dentry;
+ struct dentry *root_dentry, *update_file;
int rc = 0;
struct hypfs_sb_info *sbi;
@@ -298,9 +298,10 @@ static int hypfs_fill_super(struct super_block *sb, void *data, int silent)
rc = hypfs_diag_create_files(root_dentry);
if (rc)
return rc;
- sbi->update_file = hypfs_create_update_file(root_dentry);
- if (IS_ERR(sbi->update_file))
- return PTR_ERR(sbi->update_file);
+ update_file = hypfs_create_update_file(root_dentry);
+ if (IS_ERR(update_file))
+ return PTR_ERR(update_file);
+ sbi->update_file = update_file;
hypfs_update_update(sb);
pr_info("Hypervisor filesystem mounted\n");
return 0;
--
2.20.1
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