On Thu, May 11, 2017 at 06:54:16PM +0200, wm4 wrote: > On Thu, 11 May 2017 13:01:36 +0200 > Michael Niedermayer <mich...@niedermayer.cc> wrote: > > > Fixes: 1293/clusterfuzz-testcase-minimized-6054752074858496 > > > > Found-by: continuous fuzzing process > > https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg > > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > > --- > > libavcodec/avcodec.h | 8 ++++++++ > > libavcodec/avpacket.c | 5 ++++- > > 2 files changed, 12 insertions(+), 1 deletion(-) > > > > diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h > > index df6d2bc748..173c083a86 100644 > > --- a/libavcodec/avcodec.h > > +++ b/libavcodec/avcodec.h > > @@ -1593,6 +1593,14 @@ enum AVPacketSideDataType { > > * AVContentLightMetadata struct. > > */ > > AV_PKT_DATA_CONTENT_LIGHT_LEVEL, > > + > > + /** > > + * The number of side data elements (in fact a bit more than it). > > + * This is not part of the public API/ABI in the sense that it may > > + * change when new side data types are added. > > + * This must stay the last enum value. > > + */ > > + AV_PKT_DATA_NB, > > }; > > OK I guess. > > > #define AV_PKT_DATA_QUALITY_FACTOR AV_PKT_DATA_QUALITY_STATS //DEPRECATED > > diff --git a/libavcodec/avpacket.c b/libavcodec/avpacket.c > > index 369dd78208..200ba99f34 100644 > > --- a/libavcodec/avpacket.c > > +++ b/libavcodec/avpacket.c > > @@ -298,7 +298,7 @@ int av_packet_add_side_data(AVPacket *pkt, enum > > AVPacketSideDataType type, > > AVPacketSideData *tmp; > > int elems = pkt->side_data_elems; > > > > - if ((unsigned)elems + 1 > INT_MAX / sizeof(*pkt->side_data)) > > + if ((unsigned)elems + 1 > FFMIN(INT_MAX / sizeof(*pkt->side_data), > > AV_PKT_DATA_NB)) > > Does the FFMIN and the old expression on the right side still have any > function?
In practice, no In principle, yes, AV_PKT_DATA_NB could be larger than INT_MAX / sizeof(*pkt->side_data do you prefer if i remove it ? [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB I know you won't believe me, but the highest form of Human Excellence is to question oneself and others. -- Socrates
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