This is a note to let you know that I've just added the patch titled
fuse: don't unhash root
to the 5.4-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-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 82dc6b1c14b9413bda118a23192fc0cc56c57e3b
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 b7bd2e623c3f3..676bc4a191afb 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -795,7 +795,6 @@ static inline u64 fuse_get_attr_version(struct fuse_conn *fc)
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 f3d712decb57c..287e850fbd644 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -313,8 +313,11 @@ struct inode *fuse_iget(struct super_block *sb, u64 nodeid,
} else if ((inode->i_mode ^ attr->mode) & S_IFMT) {
/* Inode has changed type, any I/O on the old 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);
