[FFmpeg-devel] [PATCH]lavc/zmbvenc: Do not left-shift negative values

[Carl Eugen Hoyos]

Am Mo., 1. Juli 2019 um 20:41 Uhr schrieb Michael Niedermayer
<michael at niedermayer.cc>:
>
> On Mon, Jul 01, 2019 at 01:47:46AM +0200, Carl Eugen Hoyos wrote:
> > Hi!
> >
> > Attached patch fixes the only (remaining) issue I see with the sample
> > of ticket #7980.
> >
> > Please comment, Carl Eugen
>
> >  zmbvenc.c |    4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> > 39d38ac46b445460b0f27aec16e70ed176fa7cfe  0001-lavc-zmbvenc-Do-not-left-shift-negative-values.patch
> > From e6ff8f43c0d92733335b52290e18231438ce7770 Mon Sep 17 00:00:00 2001
> > From: Carl Eugen Hoyos <ceffmpeg at 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(-)
>
> LGTM

Patch applied.

Thank you, Carl Eugen