fs/namei.c |   13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index 5c867dd1c0b3..f78d2af3aef4 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -938,6 +938,8 @@ static bool __follow_mount_rcu(struct nameidata *nd, struct path *path,
 {
 	for (;;) {
 		struct vfsmount *mounted;
+		unsigned int seq;
+
 		/*
 		 * Don't forget we might have a non-mountpoint managed dentry
 		 * that wants to block transit.
@@ -952,9 +954,18 @@ static bool __follow_mount_rcu(struct nameidata *nd, struct path *path,
 		mounted = __lookup_mnt(path->mnt, path->dentry, 1);
 		if (!mounted)
 			break;
+		seq = read_seqcount_begin(&mounted->mnt_root->d_seq);
+
+		/*
+		 * The memory barrier in read_seqcount_begin() is sufficient,
+		 * so we can use __read_seqcount_retry() to check the prev
+		 * sequence numbers.
+		 */
+		if (!__read_seqcount_retry(&path->dentry->d_seq, nd->seq))
+			return false;
 		path->mnt = mounted;
 		path->dentry = mounted->mnt_root;
-		nd->seq = read_seqcount_begin(&path->dentry->d_seq);
+		nd->seq = seq;
 	}
 	return true;
 }