Hi!
Undefined behaviour was reported in ticket #7981, attached patch tries
to fix it.
Please review, Carl Eugen
From d77386d4a18d6d749d15516b5eb6df90507bf1eb Mon Sep 17 00:00:00 2001
From: Carl Eugen Hoyos <ceffm...@gmail.com>
Date: Mon, 1 Jul 2019 01:09:19 +0200
Subject: [PATCH] lavf/nutenc: Do not call memcmp() with NULL argument.
Reported in ticket #7981
---
libavformat/nutenc.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/libavformat/nutenc.c b/libavformat/nutenc.c
index e9a3bb49db..a3a097aacc 100644
--- a/libavformat/nutenc.c
+++ b/libavformat/nutenc.c
@@ -791,6 +791,7 @@ static int get_needed_flags(NUTContext *nut, StreamContext *nus, FrameCode *fc,
flags |= FLAG_CHECKSUM;
if (pkt->size < nut->header_len[fc->header_idx] ||
(pkt->size > 4096 && fc->header_idx) ||
+ nut->header[fc->header_idx] &&
memcmp(pkt->data, nut->header[fc->header_idx],
nut->header_len[fc->header_idx]))
flags |= FLAG_HEADER_IDX;
--
2.22.0
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