This is a note to let you know that I've just added the patch titled NFS: LOOKUP_DIRECTORY is also ok with symlinks to the 5.10-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: nfs-lookup_directory-is-also-ok-with-symlinks.patch and it can be found in the queue-5.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit cf987c44afab63a144400a8aee796a58a13f0a2a Author: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx> Date: Tue Feb 8 13:38:23 2022 -0500 NFS: LOOKUP_DIRECTORY is also ok with symlinks [ Upstream commit e0caaf75d443e02e55e146fd75fe2efc8aed5540 ] Commit ac795161c936 (NFSv4: Handle case where the lookup of a directory fails) [1], part of Linux since 5.17-rc2, introduced a regression, where a symbolic link on an NFS mount to a directory on another NFS does not resolve(?) the first time it is accessed: Reported-by: Paul Menzel <pmenzel@xxxxxxxxxxxxx> Fixes: ac795161c936 ("NFSv4: Handle case where the lookup of a directory fails") Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx> Tested-by: Donald Buczek <buczek@xxxxxxxxxxxxx> Signed-off-by: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 682c7b45d8b71..2ad56ff4752c7 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -1780,14 +1780,14 @@ int nfs_atomic_open(struct inode *dir, struct dentry *dentry, if (!res) { inode = d_inode(dentry); if ((lookup_flags & LOOKUP_DIRECTORY) && inode && - !S_ISDIR(inode->i_mode)) + !(S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))) res = ERR_PTR(-ENOTDIR); else if (inode && S_ISREG(inode->i_mode)) res = ERR_PTR(-EOPENSTALE); } else if (!IS_ERR(res)) { inode = d_inode(res); if ((lookup_flags & LOOKUP_DIRECTORY) && inode && - !S_ISDIR(inode->i_mode)) { + !(S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))) { dput(res); res = ERR_PTR(-ENOTDIR); } else if (inode && S_ISREG(inode->i_mode)) {