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NFS: Fix an Oops in nfs_d_automount()

Message ID 20221117134713.9069-1-trondmy@kernel.org (mailing list archive)
State New, archived
Headers show
Series NFS: Fix an Oops in nfs_d_automount() | expand

Commit Message

Trond Myklebust Nov. 17, 2022, 1:47 p.m. UTC 
From: Trond Myklebust <trond.myklebust@hammerspace.com>

When mounting from a NFSv4 referral, path->dentry can end up being a
negative dentry, so derive the struct nfs_server from the dentry
itself instead.

Fixes: 2b0143b5c986 ("VFS: normal filesystems (and lustre): d_inode() annotations")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
 fs/nfs/namespace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
index 2f336ace7555..88a23af2bd5c 100644
--- a/fs/nfs/namespace.c
+++ b/fs/nfs/namespace.c
@@ -147,7 +147,7 @@  struct vfsmount *nfs_d_automount(struct path *path)
 	struct nfs_fs_context *ctx;
 	struct fs_context *fc;
 	struct vfsmount *mnt = ERR_PTR(-ENOMEM);
-	struct nfs_server *server = NFS_SERVER(d_inode(path->dentry));
+	struct nfs_server *server = NFS_SB(path->dentry->d_sb);
 	struct nfs_client *client = server->nfs_client;
 	int timeout = READ_ONCE(nfs_mountpoint_expiry_timeout);
 	int ret;