From: David Miller <davem@davemloft.net>
To: dborkman@redhat.com
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH net] packet: packet_getname_spkt: make sure string is always 0-terminated
Date: Thu, 13 Jun 2013 01:38:59 -0700 (PDT) [thread overview]
Message-ID: <20130613.013859.1357765580190105873.davem@davemloft.net> (raw)
In-Reply-To: <1371045747-15203-1-git-send-email-dborkman@redhat.com>
From: Daniel Borkmann <dborkman@redhat.com>
Date: Wed, 12 Jun 2013 16:02:27 +0200
> uaddr->sa_data is exactly of size 14, which is hard-coded here and
> passed as a size argument to strncpy(). A device name can be of size
> IFNAMSIZ (== 16), meaning we might leave the destination string
> unterminated. Thus, use strlcpy() and also sizeof() while we're
> at it. We need to memset the data area beforehand, since strlcpy
> does not padd the remaining buffer with zeroes for user space, so
> that we do not possibly leak anything.
>
> Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Applied, and queued up for -stable, thanks.
next prev parent reply other threads:[~2013-06-13 8:39 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-12 14:02 [PATCH net] packet: packet_getname_spkt: make sure string is always 0-terminated Daniel Borkmann
2013-06-13 8:38 ` David Miller [this message]
2013-06-13 17:05 ` Ben Hutchings
2013-06-13 17:09 ` Ben Hutchings
2013-06-13 20:02 ` Daniel Borkmann
2013-06-13 20:47 ` Ben Hutchings
2013-06-13 21:17 ` Daniel Borkmann
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