[vlc-devel] [PATCH] MKV: we can read a Cluster with unknown size and more check finite size checking before testing too big sizes
Jean-Baptiste Kempf
jb at videolan.org
Fri Feb 20 19:19:44 CET 2015
I don't seem able to apply this patch.
Le 20/02/2015 16:41, Steve Lhomme a écrit :
> Replaces the previous similar patch from a few minutes ago with more
> checks.
>
> ---
> modules/demux/mkv/demux.cpp | 2 +-
> modules/demux/mkv/matroska_segment.cpp | 12 ++++++------
> modules/demux/mkv/matroska_segment_parse.cpp | 14 +++++++-------
> 3 files changed, 14 insertions(+), 14 deletions(-)
>
> diff --git a/modules/demux/mkv/demux.cpp b/modules/demux/mkv/demux.cpp
> index 1feca55..21618f4 100644
> --- a/modules/demux/mkv/demux.cpp
> +++ b/modules/demux/mkv/demux.cpp
> @@ -519,7 +519,7 @@ matroska_stream_c
> *demux_sys_t::AnalyseAllSegmentsFound( demux_t *p_demux, EbmlS
> // find the families of this segment
> KaxInfo *p_info = static_cast<KaxInfo*>(p_l1);
> b_keep_segment = b_initial;
> - if( unlikely( p_info->GetSize() >= SIZE_MAX ) )
> + if( unlikely( p_info->IsFiniteSize() &&
> p_info->GetSize() >= SIZE_MAX ) )
> {
> msg_Err( p_demux, "KaxInfo too big aborting" );
> break;
> diff --git a/modules/demux/mkv/matroska_segment.cpp
> b/modules/demux/mkv/matroska_segment.cpp
> index df24096..f71df70 100644
> --- a/modules/demux/mkv/matroska_segment.cpp
> +++ b/modules/demux/mkv/matroska_segment.cpp
> @@ -139,7 +139,7 @@ void matroska_segment_c::LoadCues( KaxCues *cues )
> KaxCueTime &ctime = *(KaxCueTime*)el;
> try
> {
> - if( unlikely( ctime.GetSize() >= SIZE_MAX ) )
> + if( unlikely( ctime.IsFiniteSize() &&
> ctime.GetSize() >= SIZE_MAX ) )
> {
> msg_Err( &sys.demuxer, "CueTime size too
> big");
> b_invalid_cue = true;
> @@ -162,7 +162,7 @@ void matroska_segment_c::LoadCues( KaxCues *cues )
> {
> while( ( el = ep->Get() ) != NULL )
> {
> - if( unlikely( el->GetSize() >= SIZE_MAX ) )
> + if( unlikely( el->IsFiniteSize() &&
> el->GetSize() >= SIZE_MAX ) )
> {
> ep->Up();
> msg_Err( &sys.demuxer, "Error %s too
> big, aborting", typeid(*el).name() );
> @@ -296,7 +296,7 @@ SimpleTag * matroska_segment_c::ParseSimpleTags(
> KaxTagSimple *tag, int target_t
> {
> while( ( el = ep->Get() ) != NULL && size < max_size)
> {
> - if( unlikely( el->GetSize() >= SIZE_MAX ) )
> + if( unlikely( el->IsFiniteSize() && el->GetSize() >=
> SIZE_MAX ) )
> {
> msg_Err( &sys.demuxer, "Error %s too big ignoring the
> tag", typeid(*el).name() );
> delete ep;
> @@ -409,7 +409,7 @@ void matroska_segment_c::LoadTags( KaxTags *tags )
> {
> try
> {
> - if( unlikely( el->GetSize() >= SIZE_MAX ) )
> + if( unlikely( el->IsFiniteSize() &&
> el->GetSize() >= SIZE_MAX ) )
> {
> msg_Err( &sys.demuxer, "Invalid size
> while reading tag");
> break;
> @@ -1351,7 +1351,7 @@ int matroska_segment_c::BlockGet( KaxBlock * &
> pp_block, KaxSimpleBlock * & pp_s
> }
> break;
> case 2:
> - if( unlikely( el->GetSize() >= SIZE_MAX ) )
> + if( unlikely( el->IsFiniteSize() && el->GetSize()
> >= SIZE_MAX ) )
> {
> msg_Err( &sys.demuxer, "Error while reading
> %s... upping level", typeid(*el).name());
> ep->Up();
> @@ -1388,7 +1388,7 @@ int matroska_segment_c::BlockGet( KaxBlock * &
> pp_block, KaxSimpleBlock * & pp_s
> }
> break;
> case 3:
> - if( unlikely( el->GetSize() >= SIZE_MAX ) )
> + if( unlikely( el->IsFiniteSize() && el->GetSize()
> >= SIZE_MAX ) )
> {
> msg_Err( &sys.demuxer, "Error while reading
> %s... upping level", typeid(*el).name());
> ep->Up();
> diff --git a/modules/demux/mkv/matroska_segment_parse.cpp
> b/modules/demux/mkv/matroska_segment_parse.cpp
> index 751c824..fc80103 100644
> --- a/modules/demux/mkv/matroska_segment_parse.cpp
> +++ b/modules/demux/mkv/matroska_segment_parse.cpp
> @@ -93,7 +93,7 @@ void matroska_segment_c::ParseSeekHead( KaxSeekHead
> *seekhead )
> {
> while( ( l = ep->Get() ) != NULL )
> {
> - if( unlikely( l->GetSize() >= SIZE_MAX ) )
> + if( unlikely( l->IsFiniteSize() && l->GetSize() >=
> SIZE_MAX ) )
> {
> msg_Err( &sys.demuxer,"%s too big... skipping
> it", typeid(*l).name() );
> continue;
> @@ -745,7 +745,7 @@ void matroska_segment_c::ParseTracks( KaxTracks
> *tracks )
> int i_upper_level = 0;
>
> /* Master elements */
> - if( unlikely( tracks->GetSize() >= SIZE_MAX ) )
> + if( unlikely( tracks->IsFiniteSize() && tracks->GetSize() >=
> SIZE_MAX ) )
> {
> msg_Err( &sys.demuxer, "Track too big, aborting" );
> return;
> @@ -786,7 +786,7 @@ void matroska_segment_c::ParseInfo( KaxInfo *info )
>
> /* Master elements */
> m = static_cast<EbmlMaster *>(info);
> - if( unlikely( m->GetSize() >= SIZE_MAX ) )
> + if( unlikely( m->IsFiniteSize() && m->GetSize() >= SIZE_MAX ) )
> {
> msg_Err( &sys.demuxer, "Info too big, aborting" );
> return;
> @@ -914,7 +914,7 @@ void matroska_segment_c::ParseInfo( KaxInfo *info )
> KaxChapterTranslate *p_trans =
> static_cast<KaxChapterTranslate*>( l );
> try
> {
> - if( unlikely( p_trans->GetSize() >= SIZE_MAX ) )
> + if( unlikely( p_trans->IsFiniteSize() &&
> p_trans->GetSize() >= SIZE_MAX ) )
> {
> msg_Err( &sys.demuxer, "Chapter translate too big,
> aborting" );
> continue;
> @@ -1108,7 +1108,7 @@ void matroska_segment_c::ParseAttachments(
> KaxAttachments *attachments )
> EbmlElement *el;
> int i_upper_level = 0;
>
> - if( unlikely( attachments->GetSize() >= SIZE_MAX ) )
> + if( unlikely( attachments->IsFiniteSize() && attachments->GetSize()
> >= SIZE_MAX ) )
> {
> msg_Err( &sys.demuxer, "Attachments too big, aborting" );
> return;
> @@ -1171,7 +1171,7 @@ void matroska_segment_c::ParseChapters(
> KaxChapters *chapters )
> int i_upper_level = 0;
>
> /* Master elements */
> - if( unlikely( chapters->GetSize() >= SIZE_MAX ) )
> + if( unlikely( chapters->IsFiniteSize() && chapters->GetSize() >=
> SIZE_MAX ) )
> {
> msg_Err( &sys.demuxer, "Chapters too big, aborting" );
> return;
> @@ -1245,7 +1245,7 @@ void matroska_segment_c::ParseCluster( KaxCluster
> *cluster, bool b_update_start_
>
> /* Master elements */
> m = static_cast<EbmlMaster *>( cluster );
> - if( unlikely( m->GetSize() >= SIZE_MAX ) )
> + if( unlikely( m->IsFiniteSize() && m->GetSize() >= SIZE_MAX ) )
> {
> msg_Err( &sys.demuxer, "Cluster too big, aborting" );
> return;
--
Jean-Baptiste Kempf
http://www.jbkempf.com/ - +33 672 704 734
Sent from my Electronic Device
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