diff options
Diffstat (limited to 'user/ffmpeg/CVE-2019-13312.patch')
| -rw-r--r-- | user/ffmpeg/CVE-2019-13312.patch | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/user/ffmpeg/CVE-2019-13312.patch b/user/ffmpeg/CVE-2019-13312.patch new file mode 100644 index 000000000..1ef9d92b4 --- /dev/null +++ b/user/ffmpeg/CVE-2019-13312.patch @@ -0,0 +1,30 @@ +From ea56af88956061d700043c5c4b026ac57834b0c8 Mon Sep 17 00:00:00 2001 +From: Carl Eugen Hoyos <ceffmpeg@gmail.com> +Date: Mon, 1 Jul 2019 01:45:36 +0200 +Subject: [PATCH] lavc/zmbvenc: Do not left-shift negative values. + +Fixes the following ubsan errors with the sample from ticket #7980: +libavcodec/zmbvenc.c:243:29: runtime error: left shift of negative value -4 +libavcodec/zmbvenc.c:244:28: runtime error: left shift of negative value -2 +--- + libavcodec/zmbvenc.c | 4 ++-- + 1 file changed, 2 insertions(+), 2 deletions(-) + +diff --git a/libavcodec/zmbvenc.c b/libavcodec/zmbvenc.c +index 4887175..0e22ce6 100644 +--- a/libavcodec/zmbvenc.c ++++ b/libavcodec/zmbvenc.c +@@ -240,8 +240,8 @@ FF_ENABLE_DEPRECATION_WARNINGS + tprev = prev + x * c->bypp; + + zmbv_me(c, tsrc, p->linesize[0], tprev, c->pstride, x, y, &mx, &my, &xored); +- mv[0] = (mx << 1) | !!xored; +- mv[1] = my << 1; ++ mv[0] = (mx * 2) | !!xored; ++ mv[1] = my * 2; + tprev += mx * c->bypp + my * c->pstride; + if(xored){ + for(j = 0; j < bh2; j++){ +-- +2.7.4 + |