On Wed, Sep 09, 2020 at 03:00:51AM +0200, Paul B Mahol wrote: > On Tue, Sep 08, 2020 at 11:29:19PM +0200, Michael Niedermayer wrote: > > Fixes: division by 0 > > Fixes: > > 25419/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FASTAUDIO_fuzzer-5632544761184256 > > Fixes: > > 25433/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FASTAUDIO_fuzzer-6215671900536832 > > > > Found-by: continuous fuzzing process > > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > > --- > > libavcodec/fastaudio.c | 3 +++ > > 1 file changed, 3 insertions(+) > > > > This should be in generic path somehow. There are decoders that does not need > this check > as they store number of channels in bitstream, but there are others that do > not, and thus adding > this check for each and every one of them is not nice.
Posted a implementation using a different, generic approuch but such generic approuch requires all decoders to declare correctly if they store the channel configuration in some header. I suspect not all codecs have this correct yet after the patchset. maybe you can check if your decoders set the flag correctly fate and a bunch of files i have all pass but i do not have input files for all decoders ... Thanks [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB The worst form of inequality is to try to make unequal things equal. -- Aristotle
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