linux-kernel - [PATCH 5.15 03/98] ksmbd: set the range of bytes to zero without extending file size in FSCTL_ZERO

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Message-Id: <20220705115617.670005125@linuxfoundation.org>
Date:   Tue,  5 Jul 2022 13:57:21 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hyunchul Lee <hyc.lee@...il.com>,
        Namjae Jeon <linkinjeon@...nel.org>,
        Steve French <stfrench@...rosoft.com>
Subject: [PATCH 5.15 03/98] ksmbd: set the range of bytes to zero without extending file size in FSCTL_ZERO_DATA

From: Namjae Jeon <linkinjeon@...nel.org>

commit 18e39fb960e6a908ac5230b57e3d0d6c25232368 upstream.

generic/091, 263 test failed since commit f66f8b94e7f2 ("cifs: when
extending a file with falloc we should make files not-sparse").
FSCTL_ZERO_DATA sets the range of bytes to zero without extending file
size. The VFS_FALLOCATE_FL_KEEP_SIZE flag should be used even on
non-sparse files.

Cc: stable@...r.kernel.org
Reviewed-by: Hyunchul Lee <hyc.lee@...il.com>
Signed-off-by: Namjae Jeon <linkinjeon@...nel.org>
Signed-off-by: Steve French <stfrench@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 fs/ksmbd/vfs.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/fs/ksmbd/vfs.c
+++ b/fs/ksmbd/vfs.c
@@ -1018,7 +1018,9 @@ int ksmbd_vfs_zero_data(struct ksmbd_wor
 				     FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
 				     off, len);
 
-	return vfs_fallocate(fp->filp, FALLOC_FL_ZERO_RANGE, off, len);
+	return vfs_fallocate(fp->filp,
+			     FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE,
+			     off, len);
 }
 
 int ksmbd_vfs_fqar_lseek(struct ksmbd_file *fp, loff_t start, loff_t length,