From fc8cff96ed45dfdb91ed03e9942845f28be0e770 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 22 Apr 2017 21:59:29 +0200 Subject: avcodec/h264_cavlc: Fix undefined behavior on qscale overflow Fixes: 1214/clusterfuzz-testcase-minimized-6130606599569408 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/h264_cavlc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'libavcodec/h264_cavlc.c') diff --git a/libavcodec/h264_cavlc.c b/libavcodec/h264_cavlc.c index 069b52129c..72dfaaab45 100644 --- a/libavcodec/h264_cavlc.c +++ b/libavcodec/h264_cavlc.c @@ -1112,7 +1112,7 @@ decode_intra_mb: dquant= get_se_golomb(&sl->gb); - sl->qscale += dquant; + sl->qscale += (unsigned)dquant; if (((unsigned)sl->qscale) > max_qp){ if (sl->qscale < 0) sl->qscale += max_qp + 1; -- cgit v1.2.3