From: Julian Wiedmann <jwi@linux.vnet.ibm.com>
To: Mateusz Jurczyk <mjurczyk@google.com>,
Ursula Braun <ubraun@linux.vnet.ibm.com>,
"David S. Miller" <davem@davemloft.net>,
linux-s390@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] af_iucv: Move sockaddr length checks to before accessing sa_family in bind and connect handlers
Date: Wed, 14 Jun 2017 16:49:06 +0200 [thread overview]
Message-ID: <a2bafded-712e-6e8b-9395-b020c73dc06a@linux.vnet.ibm.com> (raw)
In-Reply-To: <20170613174228.9218-1-mjurczyk@google.com>
On 06/13/2017 07:42 PM, Mateusz Jurczyk wrote:
> Verify that the caller-provided sockaddr structure is large enough to
> contain the sa_family field, before accessing it in bind() and connect()
> handlers of the AF_IUCV socket. Since neither syscall enforces a minimum
> size of the corresponding memory region, very short sockaddrs (zero or
> one byte long) result in operating on uninitialized memory while
> referencing .sa_family.
>
> Signed-off-by: Mateusz Jurczyk <mjurczyk@google.com>
Thanks Mateusz!
Fixes: 52a82e23b9f2
Acked-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
prev parent reply other threads:[~2017-06-14 14:49 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-13 17:42 [PATCH] af_iucv: Move sockaddr length checks to before accessing sa_family in bind and connect handlers Mateusz Jurczyk
2017-06-13 20:15 ` David Miller
2017-06-14 14:49 ` Julian Wiedmann [this message]
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