netdev - Re: [PATCH net] selftests/net: in timestamping, strncpy needs to preserve null byte

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Date:   Mon, 08 Jun 2020 19:14:41 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     tannerlove.kernel@...il.com
Cc:     netdev@...r.kernel.org, tannerlove@...gle.com, willemb@...gle.com
Subject: Re: [PATCH net] selftests/net: in timestamping, strncpy needs to
 preserve null byte

From: Tanner Love <tannerlove.kernel@...il.com>
Date: Mon,  8 Jun 2020 15:37:15 -0400

> From: tannerlove <tannerlove@...gle.com>
> 
> If user passed an interface option longer than 15 characters, then
> device.ifr_name and hwtstamp.ifr_name became non-null-terminated
> strings. The compiler warned about this:
> 
> timestamping.c:353:2: warning: ‘strncpy’ specified bound 16 equals \
> destination size [-Wstringop-truncation]
>   353 |  strncpy(device.ifr_name, interface, sizeof(device.ifr_name));
> 
> Fixes: cb9eff097831 ("net: new user space API for time stamping of incoming and outgoing packets")
> Signed-off-by: Tanner Love <tannerlove@...gle.com>
> Acked-by: Willem de Bruijn <willemb@...gle.com>

Applied, thank you.