On Tue, Feb 09, 2021 at 02:20:41AM +1100, Peter Ross wrote: > 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
yes > looks good will apply thx [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Those who are best at talking, realize last or never when they are wrong.
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