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

Greg Kroah-Hartman
2022-07-05T12:21:41Z

From: Namjae Jeon <linkinjeon@kernel.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@vger.kernel.org
Reviewed-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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,