diff mbox series

[v6.10,2/3] stat: use vfs_empty_path() helper

Message ID 20240918-statx-stable-linux-6-10-y-v1-2-8364a071074f@gmail.com (mailing list archive)
State New
Headers show
Series Backport statx(..., NULL, AT_EMPTY_PATH, ...) | expand

Commit Message

Miao Wang via B4 Relay Sept. 18, 2024, 2:01 p.m. UTC 
From: Christian Brauner <brauner@kernel.org>

commit 27a2d0c upstream.

Use the newly added helper for this.

Signed-off-by: Christian Brauner <brauner@kernel.org>

Cc: <stable@vger.kernel.org> # 6.10.x
Signed-off-by: Miao Wang <shankerwangmiao@gmail.com>
Tested-by: Xi Ruoyao <xry111@xry111.site>
---
 fs/stat.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)
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Patch

diff --git a/fs/stat.c b/fs/stat.c
index 70bd3e888cfa..0e8558f9c0b3 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -289,16 +289,8 @@  int vfs_fstatat(int dfd, const char __user *filename,
 	 * If AT_EMPTY_PATH is set, we expect the common case to be that
 	 * empty path, and avoid doing all the extra pathname work.
 	 */
-	if (dfd >= 0 && flags == AT_EMPTY_PATH) {
-		char c;
-
-		ret = get_user(c, filename);
-		if (unlikely(ret))
-			return ret;
-
-		if (likely(!c))
-			return vfs_fstat(dfd, stat);
-	}
+	if (flags == AT_EMPTY_PATH && vfs_empty_path(dfd, filename))
+		return vfs_fstat(dfd, stat);
 
 	name = getname_flags(filename, getname_statx_lookup_flags(statx_flags), NULL);
 	ret = vfs_statx(dfd, name, statx_flags, stat, STATX_BASIC_STATS);