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-rw-r--r--fs/namespace.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/namespace.c b/fs/namespace.c
index 154822397780..fb2d1ad022bf 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1816,7 +1816,13 @@ static int do_remount(struct path *path, int flags, int mnt_flags,
}
if ((mnt->mnt.mnt_flags & MNT_LOCK_NODEV) &&
!(mnt_flags & MNT_NODEV)) {
- return -EPERM;
+ /* Was the nodev implicitly added in mount? */
+ if ((mnt->mnt_ns->user_ns != &init_user_ns) &&
+ !(sb->s_type->fs_flags & FS_USERNS_DEV_MOUNT)) {
+ mnt_flags |= MNT_NODEV;
+ } else {
+ return -EPERM;
+ }
}
if ((mnt->mnt.mnt_flags & MNT_LOCK_NOSUID) &&
!(mnt_flags & MNT_NOSUID)) {