Patch "fuse: don't unhash root" 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

    fuse: don't unhash root

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:
     fuse-don-t-unhash-root.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 06c031fa057f875e21845b22ae51627b63134dc9
Author: Miklos Szeredi <mszeredi@xxxxxxxxxx>
Date:   Wed Feb 28 16:50:49 2024 +0100

    fuse: don't unhash root
    
    [ Upstream commit b1fe686a765e6c0d71811d825b5a1585a202b777 ]
    
    The root inode is assumed to be always hashed.  Do not unhash the root
    inode even if it is marked BAD.
    
    Fixes: 5d069dbe8aaf ("fuse: fix bad inode")
    Cc: <stable@xxxxxxxxxxxxxxx> # v5.11
    Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index a9681fecbd91f..253b9b78d6f13 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -923,7 +923,6 @@ static inline bool fuse_stale_inode(const struct inode *inode, int generation,
 
 static inline void fuse_make_bad(struct inode *inode)
 {
-	remove_inode_hash(inode);
 	set_bit(FUSE_I_BAD, &get_fuse_inode(inode)->state);
 }
 
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index f81000d968875..367e3b276092f 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -445,8 +445,11 @@ struct inode *fuse_iget(struct super_block *sb, u64 nodeid,
 	} else if (fuse_stale_inode(inode, generation, attr)) {
 		/* nodeid was reused, any I/O on the old inode should fail */
 		fuse_make_bad(inode);
-		iput(inode);
-		goto retry;
+		if (inode != d_inode(sb->s_root)) {
+			remove_inode_hash(inode);
+			iput(inode);
+			goto retry;
+		}
 	}
 	fi = get_fuse_inode(inode);
 	spin_lock(&fi->lock);




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