Message ID | 20220213144004.4230-1-michael@niedermayer.cc |
---|---|
State | Accepted |
Commit | 710e51677a6f3a5c2b37dc31a597957a22a5e531 |
Headers | show |
Series | [FFmpeg-devel] avformat/matroskadec: Check pre_ns | expand |
Context | Check | Description |
---|---|---|
andriy/make_x86 | success | Make finished |
andriy/make_fate_x86 | success | Make fate finished |
yinshiyou/make_loongarch64 | success | Make finished |
yinshiyou/make_fate_loongarch64 | success | Make fate finished |
andriy/make_ppc | success | Make finished |
andriy/make_fate_ppc | success | Make fate finished |
andriy/make_aarch64_jetson | success | Make finished |
andriy/make_fate_aarch64_jetson | success | Make fate finished |
andriy/make_armv7_RPi4 | success | Make finished |
andriy/make_fate_armv7_RPi4 | success | Make fate finished |
On Sun, Feb 13, 2022 at 03:40:04PM +0100, Michael Niedermayer wrote: > Fixes: division by 0 > Fixes: 44615/clusterfuzz-testcase-minimized-ffmpeg_dem_WEBM_DASH_MANIFEST_fuzzer-6681108677263360 > > Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> > --- > libavformat/matroskadec.c | 2 ++ > 1 file changed, 2 insertions(+) will apply [...]
diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c index 31e5111225..91f3567692 100644 --- a/libavformat/matroskadec.c +++ b/libavformat/matroskadec.c @@ -4205,6 +4205,8 @@ static int64_t webm_dash_manifest_compute_bandwidth(AVFormatContext *s, int64_t // prebuffered. pre_bytes = desc_end.end_offset - desc_end.start_offset; pre_ns = desc_end.end_time_ns - desc_end.start_time_ns; + if (pre_ns <= 0) + return -1; pre_sec = pre_ns / nano_seconds_per_second; prebuffer_bytes += pre_bytes * ((temp_prebuffer_ns / nano_seconds_per_second) / pre_sec);
Fixes: division by 0 Fixes: 44615/clusterfuzz-testcase-minimized-ffmpeg_dem_WEBM_DASH_MANIFEST_fuzzer-6681108677263360 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> --- libavformat/matroskadec.c | 2 ++ 1 file changed, 2 insertions(+)