From: Steve French <stfrench@microsoft.com>
Date: Thu, 5 Sep 2019 04:07:52 +0000 (-0500)
Subject: smb3: fix signing verification of large reads
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=46f17d17687e8140f2e4e517d7dfa65e62fcc5f4;p=linux.git

smb3: fix signing verification of large reads

Code cleanup in the 5.1 kernel changed the array
passed into signing verification on large reads leading
to warning messages being logged when copying files to local
systems from remote.

   SMB signature verification returned error = -5

This changeset fixes verification of SMB3 signatures of large
reads.

Suggested-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
---

diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 4c9c34cdf05f9..9a65e517df30c 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -3483,8 +3483,8 @@ smb2_readv_callback(struct mid_q_entry *mid)
 	struct smb2_sync_hdr *shdr =
 				(struct smb2_sync_hdr *)rdata->iov[0].iov_base;
 	struct cifs_credits credits = { .value = 0, .instance = 0 };
-	struct smb_rqst rqst = { .rq_iov = rdata->iov,
-				 .rq_nvec = 2,
+	struct smb_rqst rqst = { .rq_iov = &rdata->iov[1],
+				 .rq_nvec = 1,
 				 .rq_pages = rdata->pages,
 				 .rq_offset = rdata->page_offset,
 				 .rq_npages = rdata->nr_pages,