From e1aad8c56090f1dda3dde400a23ff50ef74af781 Mon Sep 17 00:00:00 2001 From: Ronnie Sahlberg Date: Mon, 12 Sep 2022 13:04:46 +1000 Subject: [PATCH] cifs: revalidate mapping when doing direct writes commit 7500a99281dfed2d4a84771c933bcb9e17af279b upstream. Kernel bugzilla: 216301 When doing direct writes we need to also invalidate the mapping in case we have a cached copy of the affected page(s) in memory or else subsequent reads of the data might return the old/stale content before we wrote an update to the server. Cc: stable@vger.kernel.org Reviewed-by: Paulo Alcantara (SUSE) Signed-off-by: Ronnie Sahlberg Signed-off-by: Steve French Signed-off-by: Greg Kroah-Hartman --- fs/cifs/file.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 3015a8b..2ef57bc 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -3318,6 +3318,9 @@ static ssize_t __cifs_writev( ssize_t cifs_direct_writev(struct kiocb *iocb, struct iov_iter *from) { + struct file *file = iocb->ki_filp; + + cifs_revalidate_mapping(file->f_inode); return __cifs_writev(iocb, from, true); } -- 2.7.4