1 files changed, 61 insertions, 0 deletions

diff --git a/meta/recipes-multimedia/ffmpeg/ffmpeg/CVE-2021-3566.patch b/meta/recipes-multimedia/ffmpeg/ffmpeg/CVE-2021-3566.patch
new file mode 100644
index 0000000000..abfc024820
--- /dev/null
+++ b/meta/recipes-multimedia/ffmpeg/ffmpeg/CVE-2021-3566.patch
@@ -0,0 +1,61 @@
+From 3bce9e9b3ea35c54bacccc793d7da99ea5157532 Mon Sep 17 00:00:00 2001
+From: Paul B Mahol <onemda@gmail.com>
+Date: Mon, 27 Jan 2020 21:53:08 +0100
+Subject: [PATCH] avformat/tty: add probe function
+
+CVE: CVE-2021-3566
+Signed-off-by: Saloni Jain <salonij@kpit.com>
+
+Upstream-Status: Backport [http://git.videolan.org/?p=ffmpeg.git;a=patch;h=3bce9e9b3ea35c54bacccc793d7da99ea5157532]
+Comment: No changes/refreshing done.
+---
+ libavformat/tty.c | 21 ++++++++++++++++++++-
+ 1 file changed, 20 insertions(+), 1 deletion(-)
+
+diff --git a/libavformat/tty.c b/libavformat/tty.c
+index 8d48f2c45c12..60f7e9f87ee7 100644
+--- a/libavformat/tty.c
++++ b/libavformat/tty.c
+@@ -34,6 +34,13 @@
+ #include "internal.h"
+ #include "sauce.h"
+ 
++static int isansicode(int x)
++{
++    return x == 0x1B || x == 0x0A || x == 0x0D || (x >= 0x20 && x < 0x7f);
++}
++
++static const char tty_extensions[31] = "ans,art,asc,diz,ice,nfo,txt,vt";
++
+ typedef struct TtyDemuxContext {
+     AVClass *class;
+     int chars_per_frame;
+@@ -42,6 +49,17 @@ typedef struct TtyDemuxContext {
+     AVRational framerate; /**< Set by a private option. */
+ } TtyDemuxContext;
+ 
++static int read_probe(const AVProbeData *p)
++{
++    int cnt = 0;
++
++    for (int i = 0; i < p->buf_size; i++)
++        cnt += !!isansicode(p->buf[i]);
++
++    return (cnt * 100LL / p->buf_size) * (cnt > 400) *
++        !!av_match_ext(p->filename, tty_extensions);
++}
++
+ /**
+  * Parse EFI header
+  */
+@@ -153,8 +171,9 @@ AVInputFormat ff_tty_demuxer = {
+     .name           = "tty",
+     .long_name      = NULL_IF_CONFIG_SMALL("Tele-typewriter"),
+     .priv_data_size = sizeof(TtyDemuxContext),
++    .read_probe     = read_probe,
+     .read_header    = read_header,
+     .read_packet    = read_packet,
+-    .extensions     = "ans,art,asc,diz,ice,nfo,txt,vt",
++    .extensions     = tty_extensions,
+     .priv_class     = &tty_demuxer_class,
+ };