s3:smb2cli_ioctl: fix requests without output_buffer.length > 0 against windows

This fixes DCERPC over SMB2 against windows servers.

metze

diff --git a/libcli/smb/smb2cli_ioctl.c b/libcli/smb/smb2cli_ioctl.c
index 2881c742ce5bd63efba2999c48ac71018f62315a..983646981a78f2f0945d76689001608444ed7b4a 100644 (file)
--- a/libcli/smb/smb2cli_ioctl.c
+++ b/libcli/smb/smb2cli_ioctl.c
@@ -77,7 +77,7 @@ struct tevent_req *smb2cli_ioctl_send(TALLOC_CTX *mem_ctx,
 
        if (in_output_buffer) {
                output_buffer_offset = SMB2_HDR_BODY+0x38;
-               if (input_buffer_length > 0) {
+               if (input_buffer_length > 0 && output_buffer_length > 0) {
                        uint32_t tmp;
                        output_buffer_offset += input_buffer_length;
                        tmp = output_buffer_offset;