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SMB3: avoid confusing warning message on mount to Azure

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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>
This commit is contained in:
Steve French 2020-12-08 21:13:31 -06:00 committed by Greg Kroah-Hartman
parent db1c6b8a26
commit aa36952c56
1 changed files with 2 additions and 1 deletions
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3
fs/cifs/smb2ops.c
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@ -477,7 +477,8 @@ parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf,
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__);