From 12dfbefda254180ed2f1ce6795380458c446bd54 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 30 Jun 2019 22:19:22 +0200 Subject: [PATCH] avcodec/h264_refs: Also check reference in ff_h264_build_ref_list() Fixes: out of array read Fixes: 15409/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_H264_fuzzer-5758846959616000 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit 7d3581e6bbec309ca0cc617c37cf6e87547764ef) Signed-off-by: Michael Niedermayer --- libavcodec/h264_refs.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/libavcodec/h264_refs.c b/libavcodec/h264_refs.c index 2cdb67f978..e43ce428c5 100644 --- a/libavcodec/h264_refs.c +++ b/libavcodec/h264_refs.c @@ -373,9 +373,11 @@ int ff_h264_build_ref_list(H264Context *h, H264SliceContext *sl) av_assert0(0); } - if (i < 0) { + if (i < 0 || mismatches_ref(h, ref)) { av_log(h->avctx, AV_LOG_ERROR, - "reference picture missing during reorder\n"); + i < 0 ? "reference picture missing during reorder\n" : + "mismatching reference\n" + ); memset(&sl->ref_list[list][index], 0, sizeof(sl->ref_list[0][0])); // FIXME } else { for (i = index; i + 1 < sl->ref_count[list]; i++) {