From: Olivier MATZ <olivier.matz@6wind.com>
To: Xueming Li <xuemingl@mellanox.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] lib/cmdline: init parse result memeory
Date: Thu, 7 Dec 2017 15:48:03 +0100 [thread overview]
Message-ID: <20171207144802.sgj33veeehxixhfk@glumotte.dev.6wind.com> (raw)
In-Reply-To: <20171115155402.9967-1-xuemingl@mellanox.com>
On Wed, Nov 15, 2017 at 11:54:02PM +0800, Xueming Li wrote:
> Initialize binary result memory before parsing to avoid garbage in
> parsing result.
>
> Signed-off-by: Xueming Li <xuemingl@mellanox.com>
> ---
> lib/librte_cmdline/cmdline_parse.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/lib/librte_cmdline/cmdline_parse.c b/lib/librte_cmdline/cmdline_parse.c
> index 3e12ee54f..9124758f1 100644
> --- a/lib/librte_cmdline/cmdline_parse.c
> +++ b/lib/librte_cmdline/cmdline_parse.c
> @@ -267,6 +267,8 @@ cmdline_parse(struct cmdline *cl, const char * buf)
> if (!cl || !buf)
> return CMDLINE_PARSE_BAD_ARGS;
>
> + memset(tmp_result.buf, 0, sizeof(tmp_result.buf));
> +
> ctx = cl->ctx;
>
> /*
Did you see an issue (a bug or a crash) without the memset()?
Or is it to avoid filling unused fields in the parsed struct?
I'm not sure if your patch is enough: cmdline_parse() calls match_inst()
for each registered command. If a command partially matches (only the
first tokens), the buffer is modified. So the next one will start
with a dirty buffer.
I suggest to put the memset() in match_inst() instead. Something
like this:
if (resbuf != NULL)
memset(resbuf, 0, resbuf_size);
It will reset the buffer before using it.
Olivier
next prev parent reply other threads:[~2017-12-07 14:48 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-15 15:54 Xueming Li
2017-12-07 14:48 ` Olivier MATZ [this message]
2017-12-07 15:05 ` Xueming(Steven) Li
2017-12-07 15:35 ` Xueming(Steven) Li
2017-12-07 17:13 ` Adrien Mazarguil
2017-12-08 7:02 ` [dpdk-dev] [PATCH v1] lib/cmdline: init parse result memory Xueming Li
2017-12-08 12:27 ` Adrien Mazarguil
2017-12-08 13:51 ` Olivier MATZ
2017-12-08 14:50 ` Xueming(Steven) Li
2017-12-08 15:04 ` Adrien Mazarguil
2017-12-08 15:26 ` Olivier MATZ
2017-12-09 15:39 ` [dpdk-dev] [PATCH v2] lib/cmdline: init CLI parsing memory Xueming Li
2017-12-14 15:35 ` Olivier MATZ
2017-12-18 10:51 ` Adrien Mazarguil
2017-12-18 13:44 ` Xueming(Steven) Li
2017-12-26 12:57 ` Xueming(Steven) Li
2018-01-16 12:45 ` Olivier Matz
2018-01-18 4:29 ` Xueming(Steven) Li
2018-01-19 9:07 ` Olivier Matz
2018-01-19 18:18 ` Xueming(Steven) Li
2018-01-19 18:16 ` [dpdk-dev] [PATCH v3] cmdline: fix dynamic tokens parsing Xueming Li
2018-01-22 13:13 ` Olivier Matz
2018-01-25 22:14 ` [dpdk-dev] [dpdk-stable] " Thomas Monjalon
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