Re: [PATCH] btrfs: sysfs: Use scnprintf() for avoiding potential buffer overflow

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Subject: Re: [PATCH] btrfs: sysfs: Use scnprintf() for avoiding potential buffer overflow
From: Anand Jain <anand.jain@xxxxxxxxxx>
Date: Wed, 11 Mar 2020 20:27:40 +0800
Cc: linux-btrfs@xxxxxxxxxxxxxxx
In-reply-to: <20200311093323.24955-1-tiwai@suse.de>
References: <20200311093323.24955-1-tiwai@suse.de>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1

On 3/11/20 5:33 PM, Takashi Iwai wrote:

Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit.  Fix it by replacing with scnprintf().

Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>


Reviewed-by: Anand Jain <anand.jain@xxxxxxxxxx>

References:
- [PATCH] btrfs: sysfs: Use scnprintf() for avoiding potential buffer overflow
  - From: Takashi Iwai

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