fix dropmask dereference even when NULL
Signed-off-by: Nikolay Dimitrov <ndimitrov@setelis.com>
diff --git a/lib/output.c b/lib/output.c
index c8e85a5..990cc6c 100644
--- a/lib/output.c
+++ b/lib/output.c
@@ -555,14 +555,15 @@
/*
* in v7, just mask the payload
*/
- for (n = 4; n < (int)len + 4; n++)
- dropmask[n] = dropmask[n] ^
+ if (dropmask) { /* never set if already inside frame */
+ for (n = 4; n < (int)len + 4; n++)
+ dropmask[n] = dropmask[n] ^
wsi->u.ws.frame_masking_nonce_04[
(wsi->u.ws.frame_mask_index++) & 3];
- if (dropmask) /* never set if already inside frame */
/* copy the frame nonce into place */
memcpy(dropmask, wsi->u.ws.frame_masking_nonce_04, 4);
+ }
}
send_raw: