On Mon, Feb 08, 2021 at 02:29:01PM +0100, Michael Niedermayer wrote: > Fixes: signed integer overflow: 2147483647 + 7 cannot be represented in type > 'int' > Fixes: > 30084/clusterfuzz-testcase-minimized-ffmpeg_dem_WTV_fuzzer-6192261941559296 > > 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 | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/libavformat/wtvdec.c b/libavformat/wtvdec.c > index 6c41e3c1a3..7def9d2348 100644 > --- a/libavformat/wtvdec.c > +++ b/libavformat/wtvdec.c > @@ -794,7 +794,7 @@ static int parse_chunks(AVFormatContext *s, int mode, > int64_t seekts, int *len_p > > ff_get_guid(pb, &g); > len = avio_rl32(pb); > - if (len < 32) { > + if (len < 32 || len > INT_MAX - 7) { > int ret; > if (avio_feof(pb)) > return AVERROR_EOF;
the + 7 comes from WTV_PAD calculation looks good -- Peter (A907 E02F A6E5 0CD2 34CD 20D2 6760 79C5 AC40 DD6B) _______________________________________________ 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".
