Patch "ceph_wait_on_conflict_unlink(): grab reference before dropping ->d_lock" has been added to the 6.1-stable tree

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This is a note to let you know that I've just added the patch titled

    ceph_wait_on_conflict_unlink(): grab reference before dropping ->d_lock

to the 6.1-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ceph_wait_on_conflict_unlink-grab-reference-before-d.patch
and it can be found in the queue-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit bc27300161bb5295ddd43e48ce3d23bb4d620337
Author: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Date:   Thu Sep 14 21:55:29 2023 -0400

    ceph_wait_on_conflict_unlink(): grab reference before dropping ->d_lock
    
    [ Upstream commit dc32464a5fe4946fe1a4d8f8e29961dc411933c5 ]
    
    Use of dget() after we'd dropped ->d_lock is too late - dentry might
    be gone by that point.
    
    Reviewed-by: Jeff Layton <jlayton@xxxxxxxxxx>
    Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index f6a7fd47efd7a..82874be945248 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -709,8 +709,8 @@ int ceph_wait_on_conflict_unlink(struct dentry *dentry)
 		if (!d_same_name(udentry, pdentry, &dname))
 			goto next;
 
+		found = dget_dlock(udentry);
 		spin_unlock(&udentry->d_lock);
-		found = dget(udentry);
 		break;
 next:
 		spin_unlock(&udentry->d_lock);



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