On Sun, Jun 28, 2020 at 05:50:40PM +0200, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
The patch below does not apply to the 4.19-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 6b69040247e14b43419a520f841f2b3052833df9 Mon Sep 17 00:00:00 2001
From: Zhang Xiaoxu <zhangxiaoxu5@xxxxxxxxxx>
Date: Tue, 23 Jun 2020 07:31:54 -0400
Subject: [PATCH] cifs/smb3: Fix data inconsistent when zero file range
CIFS implements the fallocate(FALLOC_FL_ZERO_RANGE) with send SMB
ioctl(FSCTL_SET_ZERO_DATA) to server. It just set the range of the
remote file to zero, but local page cache not update, then the data
inconsistent with server, which leads the xfstest generic/008 failed.
So we need to remove the local page caches before send SMB
ioctl(FSCTL_SET_ZERO_DATA) to server. After next read, it will
re-cache it.
Fixes: 30175628bf7f5 ("[SMB3] Enable fallocate -z support for SMB3 mounts")
Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: Zhang Xiaoxu <zhangxiaoxu5@xxxxxxxxxx>
Reviewed-by: Pavel Shilovsky <pshilov@xxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # v3.17
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
Conflict with the tracepoint that didn't exist on older kernels. Fixed
up and queued for 4.19, 4.14, 4.9, and 4.4.
--
Thanks,
Sasha
