Fixes: signed integer overflow: 539033600 - -1910497124 cannot be represented in type 'int' Fixes: 30928/clusterfuzz-testcase-minimized-ffmpeg_dem_WTV_fuzzer-5922630966312960
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavformat/wtvdec.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavformat/wtvdec.c b/libavformat/wtvdec.c index 7def9d2348..4b3b7fb407 100644 --- a/libavformat/wtvdec.c +++ b/libavformat/wtvdec.c @@ -817,6 +817,8 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p avio_skip(pb, 12); ff_get_guid(pb, &formattype); size = avio_rl32(pb); + if (size < 0 || size > INT_MAX - 92) + return AVERROR_INVALIDDATA; parse_media_type(s, 0, sid, mediatype, subtype, formattype, size); consumed += 92 + size; } @@ -831,6 +833,8 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p avio_skip(pb, 12); ff_get_guid(pb, &formattype); size = avio_rl32(pb); + if (size < 0 || size > INT_MAX - 76) + return AVERROR_INVALIDDATA; parse_media_type(s, s->streams[stream_index], sid, mediatype, subtype, formattype, size); consumed += 76 + size; } -- 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".
