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From: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
To: zhihongx.peng@intel.com
Cc: olivier.matz@6wind.com, dev@dpdk.org, stable@dpdk.org
Subject: Re: [dpdk-stable] [PATCH v3 1/2] lib/cmdline: release cl when cmdline exit
Date: Mon, 11 Oct 2021 11:25:58 +0300
Message-ID: <20211011112558.21c68bfa@sovereign> (raw)
In-Reply-To: <20211008064131.369133-1-zhihongx.peng@intel.com>

2021-10-08 06:41 (UTC+0000), 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

As I have explained before, backporting this will introduce a double-free bug
in user apps unless their code are fixed, so it must not be done.

> 
> Signed-off-by: Zhihong Peng <zhihongx.peng@intel.com>
> ---
>  doc/guides/rel_notes/release_21_11.rst | 5 +++++
>  lib/cmdline/cmdline_socket.c           | 1 +
>  2 files changed, 6 insertions(+)
> 
> diff --git a/doc/guides/rel_notes/release_21_11.rst b/doc/guides/rel_notes/release_21_11.rst
> index efeffe37a0..be24925d16 100644
> --- a/doc/guides/rel_notes/release_21_11.rst
> +++ b/doc/guides/rel_notes/release_21_11.rst
> @@ -191,6 +191,11 @@ API Changes
>    the crypto/security operation. This field will be used to communicate
>    events such as soft expiry with IPsec in lookaside mode.
>  
> +* cmdline: The API cmdline_stdin_exit has added cmdline_free function.
> +  Malloc cl in the cmdline_stdin_new function, so release in the
> +  cmdline_stdin_exit function is logical. The application code
> +  that calls cmdline_free needs to be deleted.
> +

There's probably no need to go into such details, suggestion:

* cmdline: ``cmdline_stdin_exit()`` now frees the ``cmdline`` structure.
  Calls to ``cmdline_free()`` after it need to be deleted from applications.

>  
>  ABI Changes
>  -----------
> 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);
>  }


  parent reply	other threads:[~2021-10-11  8:26 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-31  2:28 [dpdk-stable] [PATCH] " zhihongx.peng
2021-08-31 16:59 ` [dpdk-stable] [dpdk-dev] " Stephen Hemminger
2021-09-06  5:45   ` Peng, ZhihongX
2021-08-31 17:52 ` Dmitry Kozlyuk
2021-09-06  5:51   ` Peng, ZhihongX
2021-09-06  7:33     ` Dmitry Kozlyuk
2021-09-30  6:53       ` Peng, ZhihongX
2021-09-30  7:44         ` Dmitry Kozlyuk
2021-10-08  6:55           ` Peng, ZhihongX
2021-09-17  2:15 ` [dpdk-stable] [PATCH v2 1/2] " zhihongx.peng
2021-09-17  2:15   ` [dpdk-stable] [PATCH v2 2/2] app/test: Delete cmdline free function zhihongx.peng
2021-10-08  6:41     ` [dpdk-stable] [PATCH v3 1/2] lib/cmdline: release cl when cmdline exit zhihongx.peng
2021-10-08  6:41       ` [dpdk-stable] [PATCH v3 2/2] app/test: delete cmdline free function zhihongx.peng
2021-10-11  8:26         ` Dmitry Kozlyuk
2021-10-11  5:20       ` [dpdk-stable] [PATCH v3 1/2] lib/cmdline: release cl when cmdline exit Peng, ZhihongX
2021-10-11  8:25       ` Dmitry Kozlyuk [this message]
2021-10-13  1:53         ` Peng, ZhihongX
2021-10-13  2:36           ` Dmitry Kozlyuk
2021-10-13  3:12             ` Peng, ZhihongX
2021-10-13  1:52       ` [dpdk-stable] [PATCH v4 " zhihongx.peng
2021-10-13  1:52         ` [dpdk-stable] [PATCH v4 2/2] app/test: delete cmdline free function zhihongx.peng
2021-10-15 12:58         ` [dpdk-stable] [PATCH v4 1/2] lib/cmdline: release cl when cmdline exit Olivier Matz
2021-10-18  5:16           ` Peng, ZhihongX
2021-09-30  6:47   ` [dpdk-stable] [PATCH v2 " Peng, ZhihongX

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