On Mon, Mar 25, 2024 at 10:22:19PM -0300, James Almer wrote: > On 3/22/2024 8:08 PM, Michael Niedermayer wrote: > > Fixes: out of array access > > Fixes: > > 67070/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-5685384082161664 > > > > Found-by: continuous fuzzing process > > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > > --- > > libavformat/mov.c | 4 ++-- > > 1 file changed, 2 insertions(+), 2 deletions(-) > > > > diff --git a/libavformat/mov.c b/libavformat/mov.c > > index f954b924a0..a87ce5cefe 100644 > > --- a/libavformat/mov.c > > +++ b/libavformat/mov.c > > @@ -8077,7 +8077,7 @@ static int mov_read_iloc(MOVContext *c, AVIOContext > > *pb, MOVAtom atom) > > } > > item_count = (version < 2) ? avio_rb16(pb) : avio_rb32(pb); > > - heif_item = av_realloc_array(c->heif_item, item_count, > > sizeof(*c->heif_item)); > > + heif_item = av_realloc_array(c->heif_item, FFMAX(item_count, > > c->nb_heif_item), sizeof(*c->heif_item)); > > if (!heif_item) > > return AVERROR(ENOMEM); > > c->heif_item = heif_item; > > @@ -8202,7 +8202,7 @@ static int mov_read_iinf(MOVContext *c, AVIOContext > > *pb, MOVAtom atom) > > avio_rb24(pb); // flags. > > entry_count = version ? avio_rb32(pb) : avio_rb16(pb); > > - heif_item = av_realloc_array(c->heif_item, entry_count, > > sizeof(*c->heif_item)); > > + heif_item = av_realloc_array(c->heif_item, FFMAX(entry_count, > > c->nb_heif_item), sizeof(*c->heif_item)); > > if (!heif_item) > > return AVERROR(ENOMEM); > > c->heif_item = heif_item; > > LGTM.
will apply thx [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Freedom in capitalist society always remains about the same as it was in ancient Greek republics: Freedom for slave owners. -- Vladimir Lenin
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