Fixes: null pointer dereference Fixes: 67494/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-6528714521247744
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavformat/mov.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavformat/mov.c b/libavformat/mov.c index 7bdeeb99f98..fa4c237c0d8 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -9364,6 +9364,10 @@ static int read_image_iovl(AVFormatContext *s, const HEIFGrid *grid, } for (int i = 0; i < tile_grid->nb_tiles; i++) { + if (!grid->tile_item_list[i]) { + ret = AVERROR_INVALIDDATA; + goto fail; + } tile_grid->offsets[i].idx = grid->tile_item_list[i]->st->index; tile_grid->offsets[i].horizontal = (flags & 1) ? avio_rb32(s->pb) : avio_rb16(s->pb); tile_grid->offsets[i].vertical = (flags & 1) ? avio_rb32(s->pb) : avio_rb16(s->pb); -- 2.17.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
