Re: [dpdk-dev] [PATCH] lib/cmdline: release cl when cmdline exit

["Peng, ZhihongX" <zhihongx.peng@intel.com>]

> -----Original Message-----
> From: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
> Sent: Wednesday, September 1, 2021 1:52 AM
> To: Peng, ZhihongX <zhihongx.peng@intel.com>
> Cc: olivier.matz@6wind.com; dev@dpdk.org; stable@dpdk.org
> Subject: Re: [dpdk-dev] [PATCH] lib/cmdline: release cl when cmdline exit
> 
> 2021-08-31 10:28 (UTC+0800), zhihongx.peng@intel.com:
> > From: Zhihong Peng <zhihongx.peng@intel.com>
> >
> > Malloc cl in the cmdline_stdin_new function, so release in the
> > cmdline_stdin_exit function is logical, so that cl will not be
> > released alone.
> >
> > Fixes: af75078fece3 (first public release)
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Zhihong Peng <zhihongx.peng@intel.com>
> > ---
> >  lib/cmdline/cmdline_socket.c | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/lib/cmdline/cmdline_socket.c
> > b/lib/cmdline/cmdline_socket.c index 998e8ade25..ebd5343754 100644
> > --- a/lib/cmdline/cmdline_socket.c
> > +++ b/lib/cmdline/cmdline_socket.c
> > @@ -53,4 +53,5 @@ cmdline_stdin_exit(struct cmdline *cl)
> >  		return;
> >
> >  	terminal_restore(cl);
> > +	cmdline_free(cl);
> >  }
> 
> Now cmdline_free() may not be called after cmdline_stdin_exit().
> User code that does so needs to be changed to avoid double-free.
> This behavior change must be documented in the release notes.
> I'm not sure it should be backported because of the above.
Using the asan tool, I found that many dpdk apps did not call cmdline_free, only one app called.