[FFmpeg-devel] [PATCH v5 2/3] libavformat/rtsp: Free memory allocated for temporary variables while processing sdp info

[Rashad Tatum]

Ok. I'll move this and the third patch to one commit/patch and also change
the condition when rtsp_src can't be allocated to also free dest_addr. Good
catch.


On Wed, Feb 26, 2025, 3:53 AM Andreas Rheinhardt <
andreas.rheinhardt at outlook.com> wrote:

> Rashad Tatum:
> > ---
> >  libavformat/rtsp.c | 2 ++
> >  1 file changed, 2 insertions(+)
> >
> > diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c
> > index 0c65f8d1a4..ac17717195 100644
> > --- a/libavformat/rtsp.c
> > +++ b/libavformat/rtsp.c
> > @@ -478,6 +478,7 @@ static void sdp_parse_line(AVFormatContext *s,
> SDPParseState *s1,
> >                                                sdp_ip_str);
> >
> >          }
> > +        av_freep(&sdp_ip_str);
> >          break;
> >      case 's':
> >          av_dict_set(&s->metadata, "title", p, 0);
> > @@ -702,6 +703,7 @@ static void sdp_parse_line(AVFormatContext *s,
> SDPParseState *s1,
> >                      }
> >                  }
> >              }
> > +            av_freep(&dest_addr);
> >          } else {
> >              if (rt->server_type == RTSP_SERVER_WMS)
> >                  ff_wms_parse_sdp_a_line(s, p);
>
> Your first patch introduces a memleak; the stuff you allocated there
> should be freed in the patch, not fixed up in a later patch.
> (Also note that there must not be a leak in any error path, which is not
> true when your patchset is applied: dest_addr leaks when rtsp_src can't
> be allocated.)
>
> - Andreas
>
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