On Wed, Aug 14, 2024 at 12:07:04PM -0300, James Almer wrote: > On 8/14/2024 11:34 AM, Michael Niedermayer wrote: > > Fixes: use of uninitialized value > > Fixes: > > 70929/clusterfuzz-testcase-minimized-ffmpeg_dem_IAMF_fuzzer-5931276639469568 > > > > Found-by: continuous fuzzing process > > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > > --- > > libavformat/iamf_parse.c | 1 + > > 1 file changed, 1 insertion(+) > > > > diff --git a/libavformat/iamf_parse.c b/libavformat/iamf_parse.c > > index 296e49157b0..f2b6d4fa518 100644 > > --- a/libavformat/iamf_parse.c > > +++ b/libavformat/iamf_parse.c > > @@ -1076,6 +1076,7 @@ int ff_iamfdec_read_descriptors(IAMFContext *c, > > AVIOContext *pb, > > size = avio_read(pb, header, FFMIN(MAX_IAMF_OBU_HEADER_SIZE, > > max_size)); > > if (size < 0) > > return size; > > + memset(header + size, 0, AV_INPUT_BUFFER_PADDING_SIZE); > > len = ff_iamf_parse_obu_header(header, size, &obu_size, > > &start_pos, &type, NULL, NULL); > > if (len < 0 || obu_size > max_size) { > > I assume get_bits() reads into the padding?
from memory, yes > > Should be ok. will apply thx [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety -- Benjamin Franklin
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