[PATCH 6.18.y 1/2] ovl: port ovl_dir_llseek() to cred guard

[Sasha Levin <sashal@kernel.org>]

From: Christian Brauner <brauner@kernel.org>

[ Upstream commit 5517646e14d18768ee72ae2f4320826f2169329a ]

Use the scoped ovl cred guard.

Link: https://patch.msgid.link/20251117-work-ovl-cred-guard-v4-26-b31603935724@kernel.org
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Stable-dep-of: 323899b4ed23 ("ovl: inherit FMODE_NONOTIFY when opening directory realfiles")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/overlayfs/readdir.c | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

diff --git a/fs/overlayfs/readdir.c b/fs/overlayfs/readdir.c
index 9ccbf78389f82..7fa4fecf15360 100644
--- a/fs/overlayfs/readdir.c
+++ b/fs/overlayfs/readdir.c
@@ -959,14 +959,8 @@ static loff_t ovl_dir_llseek(struct file *file, loff_t offset, int origin)
 static struct file *ovl_dir_open_realfile(const struct file *file,
 					  const struct path *realpath)
 {
-	struct file *res;
-	const struct cred *old_cred;
-
-	old_cred = ovl_override_creds(file_inode(file)->i_sb);
-	res = ovl_path_open(realpath, O_RDONLY | (file->f_flags & O_LARGEFILE));
-	ovl_revert_creds(old_cred);
-
-	return res;
+	with_ovl_creds(file_inode(file)->i_sb)
+		return ovl_path_open(realpath, O_RDONLY | (file->f_flags & O_LARGEFILE));
 }
 
 /*
-- 
2.53.0