[FFmpeg-devel] [PATCH v1] avformat/mpeg: fix CID 1455132: Memory - illegal accesses (UNINIT)

[Limin Wang]

On Thu, Oct 24, 2019 at 04:07:37AM +0200, Andreas Rheinhardt wrote:
> On Thu, Oct 24, 2019 at 3:36 AM <lance.lmwang at gmail.com> wrote:
> 
> > From: Limin Wang <lance.lmwang at gmail.com>
> >
> > Before header_str is initialized, the code is possible to goto end and
> > free the
> > header_str and cause invalid access.
> >
> > Signed-off-by: Limin Wang <lance.lmwang at gmail.com>
> > ---
> >  libavformat/mpeg.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/libavformat/mpeg.c b/libavformat/mpeg.c
> > index c33401f1a0..ebc064931a 100644
> > --- a/libavformat/mpeg.c
> > +++ b/libavformat/mpeg.c
> > @@ -720,7 +720,7 @@ static int vobsub_read_header(AVFormatContext *s)
> >      int i, ret = 0, header_parsed = 0, langidx = 0;
> >      MpegDemuxContext *vobsub = s->priv_data;
> >      size_t fname_len;
> > -    char *header_str;
> > +    char *header_str = NULL;
> >      AVBPrint header;
> >      int64_t delay = 0;
> >      AVStream *st = NULL;
> > --
> > 2.21.0
> >
> > Posted a patch for this two days ago:
> https://ffmpeg.org/pipermail/ffmpeg-devel/2019-October/251957.html

sorry, haven't notice it, please ignore this.

> 
> - Andreas
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