From c03029a835949fc0e68b4c6558ebcdc3ae137087 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 8 Feb 2017 17:55:41 +0100 Subject: [PATCH] avcodec/h264_slice: Clear ref_counts on redundant slices Fixes reading freed memory Fixes: 568/clusterfuzz-testcase-6107186067406848 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/h264_slice.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c index 6b555ab4c5..91a3b2524a 100644 --- a/libavcodec/h264_slice.c +++ b/libavcodec/h264_slice.c @@ -1999,8 +1999,10 @@ int ff_h264_queue_decode_slice(H264Context *h, const H2645NAL *nal) return ret; // discard redundant pictures - if (sl->redundant_pic_count > 0) + if (sl->redundant_pic_count > 0) { + sl->ref_count[0] = sl->ref_count[1] = 0; return 0; + } if (sl->first_mb_addr == 0 || !h->current_slice) { if (h->setup_finished) {