1 files changed, 85 insertions, 0 deletions
diff --git a/multimedia/ffmpeg/patches/patch-SA51464 b/multimedia/ffmpeg/patches/patch-SA51464
new file mode 100644
index 00000000000..d5a0c39cf52
--- /dev/null
+++ b/multimedia/ffmpeg/patches/patch-SA51464
@@ -0,0 +1,85 @@
+$NetBSD: patch-SA51464,v 1.1 2012/12/19 14:58:33 drochner Exp $
+
+see https://trac.videolan.org/vlc/ticket/7860
+
+--- libavformat/swfdec.c.orig	2012-12-03 21:17:35.000000000 +0000
++++ libavformat/swfdec.c
+@@ -153,6 +153,10 @@ static int swf_read_packet(AVFormatConte
+         tag = get_swf_tag(pb, &len);
+         if (tag < 0)
+             return tag;
++        if (len < 0) {
++            av_log(s, AV_LOG_ERROR, "invalid tag length: %d\n", len);
++            return AVERROR_INVALIDDATA;
++        }
+         if (tag == TAG_VIDEOSTREAM) {
+             int ch_id = avio_rl16(pb);
+             len -= 2;
+@@ -208,7 +212,10 @@ static int swf_read_packet(AVFormatConte
+                 st = s->streams[i];
+                 if (st->codec->codec_type == AVMEDIA_TYPE_VIDEO && st->id == ch_id) {
+                     frame = avio_rl16(pb);
+-                    if ((res = av_get_packet(pb, pkt, len-2)) < 0)
++                    len -= 2;
++                    if (len <= 0)
++                        goto skip;
++                    if ((res = av_get_packet(pb, pkt, len)) < 0)
+                         return res;
+                     pkt->pos = pos;
+                     pkt->pts = frame;
+@@ -220,17 +227,22 @@ static int swf_read_packet(AVFormatConte
+             for (i = 0; i < s->nb_streams; i++) {
+                 st = s->streams[i];
+                 if (st->codec->codec_type == AVMEDIA_TYPE_AUDIO && st->id == -1) {
+-            if (st->codec->codec_id == AV_CODEC_ID_MP3) {
+-                avio_skip(pb, 4);
+-                if ((res = av_get_packet(pb, pkt, len-4)) < 0)
+-                    return res;
+-            } else { // ADPCM, PCM
+-                if ((res = av_get_packet(pb, pkt, len)) < 0)
+-                    return res;
+-            }
+-            pkt->pos = pos;
+-            pkt->stream_index = st->index;
+-            return pkt->size;
++                    if (st->codec->codec_id == AV_CODEC_ID_MP3) {
++                        avio_skip(pb, 4);
++                        len -= 4;
++                        if (len <= 0)
++                            goto skip;
++                        if ((res = av_get_packet(pb, pkt, len)) < 0)
++                            return res;
++                    } else { // ADPCM, PCM
++                        if (len <= 0)
++                            goto skip;
++                        if ((res = av_get_packet(pb, pkt, len)) < 0)
++                            return res;
++                    }
++                    pkt->pos          = pos;
++                    pkt->stream_index = st->index;
++                    return pkt->size;
+                 }
+             }
+         } else if (tag == TAG_JPEG2) {
+@@ -250,7 +262,10 @@ static int swf_read_packet(AVFormatConte
+                 st = vst;
+             }
+             avio_rl16(pb); /* BITMAP_ID */
+-            if ((res = av_new_packet(pkt, len-2)) < 0)
++            len -= 2;
++            if (len < 4)
++                goto skip;
++            if ((res = av_new_packet(pkt, len)) < 0)
+                 return res;
+             avio_read(pb, pkt->data, 4);
+             if (AV_RB32(pkt->data) == 0xffd8ffd9 ||
+@@ -267,6 +282,9 @@ static int swf_read_packet(AVFormatConte
+             return pkt->size;
+         }
+     skip:
++        if(len<0)
++            av_log(s, AV_LOG_WARNING, "Cliping len %d\n", len);
++        len = FFMAX(0, len);
+         avio_skip(pb, len);
+     }
+ }