On Sun, Feb 09, 2025 at 03:24:20AM +0100, Michael Niedermayer wrote: > Fixes: null pointer dereference > Fixes: > 385644864/clusterfuzz-testcase-minimized-ffmpeg_dem_IFF_fuzzer-4551049565765632 > > Found-by: continuous fuzzing process > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > --- > libavformat/iff.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/libavformat/iff.c b/libavformat/iff.c > index 38f90dd81cb..7142a06e98f 100644 > --- a/libavformat/iff.c > +++ b/libavformat/iff.c > @@ -364,6 +364,9 @@ static int read_dst_frame(AVFormatContext *s, AVPacket > *pkt) > uint64_t chunk_pos, data_pos, data_size; > int ret = AVERROR_EOF; > > + if (s->nb_streams < 1) > + return AVERROR_INVALIDDATA; > + > while (!avio_feof(pb)) { > chunk_pos = avio_tell(pb); > if (chunk_pos >= iff->body_end) > -- > 2.48.1
please apply, thanks. -- Peter (A907 E02F A6E5 0CD2 34CD 20D2 6760 79C5 AC40 DD6B)
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