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-rw-r--r--fs/ceph/super.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index 7d377c9a5e35..6627b26a800c 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -357,7 +357,7 @@ static int parse_mount_options(struct ceph_mount_options **pfsopt,
}
err = -EINVAL;
dev_name_end--; /* back up to ':' separator */
- if (*dev_name_end != ':') {
+ if (dev_name_end < dev_name || *dev_name_end != ':') {
pr_err("device name is missing path (no : separator in %s)\n",
dev_name);
goto out;