From: Christian Brauner <brauner@kernel.org>
Date: Tue, 4 Nov 2025 12:12:36 +0000 (+0100)
Subject: open: use super write guard in do_ftruncate()
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=97f9d2d282c9f5647784301b4bed82f825e1c2d6;p=thirdparty%2Flinux.git

open: use super write guard in do_ftruncate()

Link: https://patch.msgid.link/20251104-work-guards-v1-7-5108ac78a171@kernel.org
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
---

diff --git a/fs/open.c b/fs/open.c
index 3d64372ecc67..1d73a17192da 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -191,12 +191,9 @@ int do_ftruncate(struct file *file, loff_t length, int small)
 	if (error)
 		return error;
 
-	sb_start_write(inode->i_sb);
-	error = do_truncate(file_mnt_idmap(file), dentry, length,
-			    ATTR_MTIME | ATTR_CTIME, file);
-	sb_end_write(inode->i_sb);
-
-	return error;
+	scoped_guard(super_write, inode->i_sb)
+		return do_truncate(file_mnt_idmap(file), dentry, length,
+				   ATTR_MTIME | ATTR_CTIME, file);
 }
 
 int do_sys_ftruncate(unsigned int fd, loff_t length, int small)