From 2611d20d353026f996cb9aaced8b35db37f490d4 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 24 Mar 2021 17:03:08 +0100 Subject: [PATCH] avformat/mov: Ignore multiple STSC / STCO Fixes: STSC / STCO inconsistency and assertion failure Fixes: crbug1184666.mp4 Found-by: Chromium ASAN fuzzer Reviewed-by: Matt Wolenetz Signed-off-by: Michael Niedermayer --- libavformat/mov.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/libavformat/mov.c b/libavformat/mov.c index cb818ebe0e..f4c2215ba4 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -2037,8 +2037,10 @@ static int mov_read_stco(MOVContext *c, AVIOContext *pb, MOVAtom atom) if (!entries) return 0; - if (sc->chunk_offsets) - av_log(c->fc, AV_LOG_WARNING, "Duplicated STCO atom\n"); + if (sc->chunk_offsets) { + av_log(c->fc, AV_LOG_WARNING, "Ignoring duplicated STCO atom\n"); + return 0; + } av_free(sc->chunk_offsets); sc->chunk_count = 0; sc->chunk_offsets = av_malloc_array(entries, sizeof(*sc->chunk_offsets)); @@ -2671,8 +2673,10 @@ static int mov_read_stsc(MOVContext *c, AVIOContext *pb, MOVAtom atom) if (!entries) return 0; - if (sc->stsc_data) - av_log(c->fc, AV_LOG_WARNING, "Duplicated STSC atom\n"); + if (sc->stsc_data) { + av_log(c->fc, AV_LOG_WARNING, "Ignoring duplicated STSC atom\n"); + return 0; + } av_free(sc->stsc_data); sc->stsc_count = 0; sc->stsc_data = av_malloc_array(entries, sizeof(*sc->stsc_data));