releases/6.8.3/fuse-don-t-unhash-root.patch

From 657951a65589b9a361352affa82d50f2af956559 Mon Sep 17 00:00:00 2001
From: Sasha Levin <sashal@kernel.org>
Date: Wed, 28 Feb 2024 16:50:49 +0100
Subject: fuse: don't unhash root

From: Miklos Szeredi <mszeredi@redhat.com>

[ 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@vger.kernel.org> # v5.11
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/fuse/fuse_i.h | 1 -
 fs/fuse/inode.c  | 7 +++++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index bcbe344888627..20924e799c9f5 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -940,7 +940,6 @@ 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 516ea2979a90f..f73865751c732 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -469,8 +469,11 @@ 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);
-- 
2.43.0