diff options
| author | Steve French <smfrench@gmail.com> | 2017-10-25 23:58:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-02 11:54:48 +0300 |
| commit | 1f33b1c5271fb470c9d569e9e3bb13731ca877bd (patch) | |
| tree | 8b4034002ec3e70303655e4d5ed0143a8aca2564 | |
| parent | b395d4baa286956234f70e0ddb6065eb558afbd4 (diff) | |
| download | linux-1f33b1c5271fb470c9d569e9e3bb13731ca877bd.tar.xz | |
SMB3: Validate negotiate request must always be signed
commit 4587eee04e2ac7ac3ac9fa2bc164fb6e548f99cd upstream.
According to MS-SMB2 3.2.55 validate_negotiate request must
always be signed. Some Windows can fail the request if you send it unsigned
See kernel bugzilla bug 197311
Acked-by: Ronnie Sahlberg <lsahlber.redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/cifs/smb2pdu.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c index 8c17020d44a9..834d18dbfb58 100644 --- a/fs/cifs/smb2pdu.c +++ b/fs/cifs/smb2pdu.c @@ -1963,6 +1963,9 @@ SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, } else iov[0].iov_len = get_rfc1002_length(req) + 4; + /* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */ + if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO) + req->hdr.sync_hdr.Flags |= SMB2_FLAGS_SIGNED; rc = SendReceive2(xid, ses, iov, n_iov, &resp_buftype, flags, &rsp_iov); cifs_small_buf_release(req); |