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hypfs: Fix error number left in struct pointer member

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[ 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@redhat.com>
cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
cc: Heiko Carstens <heiko.carstens@de.ibm.com>
cc: linux-s390@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
David Howells 2019-03-21 10:08:08 +00:00 committed by Greg Kroah-Hartman
parent 1a63ec5f8f
commit fca236097d
1 changed files with 5 additions and 4 deletions
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9
arch/s390/hypfs/inode.c
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@ -269,7 +269,7 @@ 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;
@ -300,9 +300,10 @@ 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;