1 files changed, 53 insertions, 0 deletions

diff --git a/meta/recipes-multimedia/ffmpeg/ffmpeg/CVE-2021-38291.patch b/meta/recipes-multimedia/ffmpeg/ffmpeg/CVE-2021-38291.patch
new file mode 100644
index 0000000000..e5be985fc3
--- /dev/null
+++ b/meta/recipes-multimedia/ffmpeg/ffmpeg/CVE-2021-38291.patch
@@ -0,0 +1,53 @@
+From e01d306c647b5827102260b885faa223b646d2d1 Mon Sep 17 00:00:00 2001
+From: James Almer <jamrial@gmail.com>
+Date: Wed, 21 Jul 2021 01:02:44 -0300
+Subject: [PATCH] avcodec/utils: don't return negative values in
+ av_get_audio_frame_duration()
+
+In some extrme cases, like with adpcm_ms samples with an extremely high channel
+count, get_audio_frame_duration() may return a negative frame duration value.
+Don't propagate it, and instead return 0, signaling that a duration could not
+be determined.
+
+CVE: CVE-2021-3566
+Fixes ticket #9312
+Signed-off-by: James Almer <jamrial@gmail.com>
+Signed-off-by: Saloni Jain <salonij@kpit.com>
+
+Upstream-Status: Backport [http://git.videolan.org/?p=ffmpeg.git;a=patch;h=e01d306c647b5827102260b885faa223b646d2d1]
+Comment: No changes/refreshing done.
+---
+ libavcodec/utils.c | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/libavcodec/utils.c b/libavcodec/utils.c
+index 5fad782f5a..cfc07cbcb8 100644
+--- a/libavcodec/utils.c
++++ b/libavcodec/utils.c
+@@ -810,20 +810,22 @@ static int get_audio_frame_duration(enum AVCodecID id, int sr, int ch, int ba,
+ 
+ int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
+ {
+-    return get_audio_frame_duration(avctx->codec_id, avctx->sample_rate,
++    int duration = get_audio_frame_duration(avctx->codec_id, avctx->sample_rate,
+                                     avctx->channels, avctx->block_align,
+                                     avctx->codec_tag, avctx->bits_per_coded_sample,
+                                     avctx->bit_rate, avctx->extradata, avctx->frame_size,
+                                     frame_bytes);
++    return FFMAX(0, duration);
+ }
+ 
+ int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes)
+ {
+-    return get_audio_frame_duration(par->codec_id, par->sample_rate,
++    int duration = get_audio_frame_duration(par->codec_id, par->sample_rate,
+                                     par->channels, par->block_align,
+                                     par->codec_tag, par->bits_per_coded_sample,
+                                     par->bit_rate, par->extradata, par->frame_size,
+                                     frame_bytes);
++    return FFMAX(0, duration);
+ }
+ 
+ #if !HAVE_THREADS
+-- 
+2.20.1