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authorAl Viro <viro@zeniv.linux.org.uk>2018-10-13 07:19:13 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2018-10-13 07:19:13 +0300
commit3df629d873f8683af6f0d34dfc743f637966d483 (patch)
treed6b4a0f09437f29bec1648deafce440fbc5f87dd /fs/gfs2
parent74dd7c97ea2ab08b41925ab2f472db573accda89 (diff)
downloadlinux-3df629d873f8683af6f0d34dfc743f637966d483.tar.xz
gfs2_meta: ->mount() can get NULL dev_name
get in sync with mount_bdev() handling of the same Reported-by: syzbot+c54f8e94e6bba03b04e9@syzkaller.appspotmail.com Cc: stable@vger.kernel.org Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/ops_fstype.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index c2469833b4fb..6b84ef6ccff3 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -1333,6 +1333,9 @@ static struct dentry *gfs2_mount_meta(struct file_system_type *fs_type,
struct path path;
int error;
+ if (!dev_name || !*dev_name)
+ return ERR_PTR(-EINVAL);
+
error = kern_path(dev_name, LOOKUP_FOLLOW, &path);
if (error) {
pr_warn("path_lookup on %s returned error %d\n",