| Message ID | 20191129235921.13096-1-michael@niedermayer.cc |
|---|---|
| State | New |
| Headers | show |
On Sat, Nov 30, 2019 at 12:59:20AM +0100, Michael Niedermayer wrote: > This should increase coverage > > Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> > --- > tools/target_dec_fuzzer.c | 6 ++++++ > 1 file changed, 6 insertions(+) will apply this and the other coverage increasing patch so we get increased coverage [...]
diff --git a/libavcodec/sonic.c b/libavcodec/sonic.c index 219412eb77..c975774b04 100644 --- a/libavcodec/sonic.c +++ b/libavcodec/sonic.c @@ -144,6 +144,8 @@ static inline av_flatten int get_symbol(RangeCoder *c, uint8_t *state, int is_si e= 0; while(get_rac(c, state+1 + FFMIN(e,9))){ //1..10 e++; + if (e > 31) + return AVERROR_INVALIDDATA; } a= 1;
Fixes: signed integer overflow: 1721520852 + 1721520852 cannot be represented in type 'int' Fixes: 18346/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SONIC_fuzzer-5709623893426176 Fixes: 18753/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SONIC_fuzzer-5663299131932672 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> --- libavcodec/sonic.c | 2 ++ 1 file changed, 2 insertions(+)