From: "Gaëtan Rivet" <gaetan.rivet@6wind.com>
To: Andrew Rybchenko <arybchenko@solarflare.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] devargs: fix devargs truncation when format string is used
Date: Wed, 18 Jul 2018 10:42:22 +0200 [thread overview]
Message-ID: <20180718084221.kbryl4ej5rmdioom@bidouze.vm.6wind.com> (raw)
In-Reply-To: <1531898610-19654-1-git-send-email-arybchenko@solarflare.com>
Hi,
On Wed, Jul 18, 2018 at 08:23:30AM +0100, Andrew Rybchenko wrote:
> Space for string terminating NUL character should be provided to
> snprintf() to avoid the last symbol truncation.
>
> Fixes: a23bc2c4e01b ("devargs: add non-variadic parsing function")
>
> Reported-by: Ivan Malov <ivan.malov@oktetlabs.ru>
> Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Acked-by: Gaetan Rivet <gaetan.rivet@6wind.com>
> ---
> lib/librte_eal/common/eal_common_devargs.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/lib/librte_eal/common/eal_common_devargs.c b/lib/librte_eal/common/eal_common_devargs.c
> index a22a2002e..5ec688aab 100644
> --- a/lib/librte_eal/common/eal_common_devargs.c
> +++ b/lib/librte_eal/common/eal_common_devargs.c
> @@ -285,7 +285,7 @@ rte_devargs_parsef(struct rte_devargs *da, const char *format, ...)
> }
>
> va_start(ap, format);
> - vsnprintf(dev, len, format, ap);
> + vsnprintf(dev, len + 1, format, ap);
Indeed, thanks for reporting and fixing.
> va_end(ap);
>
> return rte_devargs_parse(da, dev);
> --
> 2.17.1
>
--
Gaëtan Rivet
6WIND
next prev parent reply other threads:[~2018-07-18 8:42 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-18 7:23 Andrew Rybchenko
2018-07-18 8:42 ` Gaëtan Rivet [this message]
2018-07-20 9:18 ` Thomas Monjalon
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