Message ID | 20210419182346.4445-1-michael@niedermayer.cc |
---|---|
State | New |
Headers | show |
Series | [FFmpeg-devel,1/9] avformat/utils: check dts/duration to be representable before using them | expand |
Context | Check | Description |
---|---|---|
andriy/x86_make | success | Make finished |
andriy/x86_make_fate | success | Make fate finished |
andriy/PPC64_make | success | Make finished |
andriy/PPC64_make_fate | success | Make fate finished |
On Mon, Apr 19, 2021 at 08:23:38PM +0200, Michael Niedermayer wrote: > Fixes: signed integer overflow: 6854513951393103890 + 3427256975738527712 cannot be represented in type 'long' > Fixes: 32936/clusterfuzz-testcase-minimized-ffmpeg_dem_R3D_fuzzer-5236914752978944 > > Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> > --- > libavformat/utils.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) will apply [...]
diff --git a/libavformat/utils.c b/libavformat/utils.c index d4ec3d0190..26528f2a68 100644 --- a/libavformat/utils.c +++ b/libavformat/utils.c @@ -1243,7 +1243,9 @@ static void update_initial_durations(AVFormatContext *s, AVStream *st, (pktl->pkt.dts == AV_NOPTS_VALUE || pktl->pkt.dts == st->first_dts || pktl->pkt.dts == RELATIVE_TS_BASE) && - !pktl->pkt.duration) { + !pktl->pkt.duration && + av_sat_add64(cur_dts, duration) == cur_dts + (uint64_t)duration + ) { pktl->pkt.dts = cur_dts; if (!st->internal->avctx->has_b_frames) pktl->pkt.pts = cur_dts;
Fixes: signed integer overflow: 6854513951393103890 + 3427256975738527712 cannot be represented in type 'long' Fixes: 32936/clusterfuzz-testcase-minimized-ffmpeg_dem_R3D_fuzzer-5236914752978944 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> --- libavformat/utils.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)