From 24f6559bd2417b30c848d27523c88949d537a83c Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 22 Feb 2017 00:42:23 +0100 Subject: [PATCH] avcodec/rv34: Fix runtime error: signed integer overflow: -2 + -2147483648 cannot be represented in type 'int' Fixes: 642/clusterfuzz-testcase-558358808074649 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/rv34.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/libavcodec/rv34.c b/libavcodec/rv34.c index aca8382f20..f1c93cffa4 100644 --- a/libavcodec/rv34.c +++ b/libavcodec/rv34.c @@ -866,6 +866,11 @@ static int rv34_decode_mv(RV34DecContext *r, int block_type) for(i = 0; i < num_mvs[block_type]; i++){ r->dmv[i][0] = get_interleaved_se_golomb(gb); r->dmv[i][1] = get_interleaved_se_golomb(gb); + if (r->dmv[i][0] == INVALID_VLC || + r->dmv[i][1] == INVALID_VLC) { + r->dmv[i][0] = r->dmv[i][1] = 0; + return AVERROR_INVALIDDATA; + } } switch(block_type){ case RV34_MB_TYPE_INTRA: