From: Brian Masney <masneyb@onstation.org>
To: Takashi Iwai <tiwai@suse.de>
Cc: Jonathan Cameron <jic23@kernel.org>, linux-iio@vger.kernel.org
Subject: Re: [PATCH v2 1/2] iio: core: Use scnprintf() for avoiding potential buffer overflow
Date: Mon, 16 Mar 2020 12:19:35 -0400 [thread overview]
Message-ID: <20200316161935.GA1526@onstation.org> (raw)
In-Reply-To: <20200316124941.8010-2-tiwai@suse.de>
On Mon, Mar 16, 2020 at 01:49:40PM +0100, Takashi Iwai wrote:
> snprintf() is a hard-to-use function, it's especially difficult to use
> it for concatenating substrings in a buffer with a limited size.
> Since snprintf() returns the would-be-output size, not the actual
> size, the subsequent use of snprintf() may go beyond the given limit
> easily. Although the current code doesn't actually overflow the
> buffer, it's an incorrect usage.
>
> This patch replaces such snprintf() calls with a safer version,
> scnprintf().
>
> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Brian Masney <masneyb@onstation.org>
next prev parent reply other threads:[~2020-03-16 16:19 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-16 12:49 [PATCH v2 0/2] iio: Use scnprintf() for avoiding potential buffer overflow Takashi Iwai
2020-03-16 12:49 ` [PATCH v2 1/2] iio: core: " Takashi Iwai
2020-03-16 16:19 ` Brian Masney [this message]
2020-03-22 18:06 ` Jonathan Cameron
2020-03-16 12:49 ` [PATCH v2 2/2] iio: tsl2772: " Takashi Iwai
2020-03-16 16:20 ` Brian Masney
2020-03-22 18:08 ` Jonathan Cameron
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