diff mbox series

[5.10,623/717] SMB3: avoid confusing warning message on mount to Azure

Message ID 20201228125050.774782951@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

gregkh@linuxfoundation.org Dec. 28, 2020, 12:50 p.m. UTC 
From: Steve French <stfrench@microsoft.com>

commit ebcd6de98754d9b6a5f89d7835864b1c365d432f upstream.

Mounts to Azure cause an unneeded warning message in dmesg
   "CIFS: VFS: parse_server_interfaces: incomplete interface info"

Azure rounds up the size (by 8 additional bytes, to a
16 byte boundary) of the structure returned on the query
of the server interfaces at mount time.  This is permissible
even though different than other servers so do not log a warning
if query network interfaces response is only rounded up by 8
bytes or fewer.

CC: Stable <stable@vger.kernel.org>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/cifs/smb2ops.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -477,7 +477,8 @@  parse_server_interfaces(struct network_i
 		goto out;
 	}
 
-	if (bytes_left || p->Next)
+	/* Azure rounds the buffer size up 8, to a 16 byte boundary */
+	if ((bytes_left > 8) || p->Next)
 		cifs_dbg(VFS, "%s: incomplete interface info\n", __func__);