From: Joe Perches <joe@perches.com>
To: David Miller <davem@davemloft.net>
Cc: mirq-linux@rere.qmqm.pl, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] vsprintf: Prevent NULL dereference using %pNF
Date: Tue, 17 Jan 2012 10:54:56 -0800 [thread overview]
Message-ID: <1326826496.17202.13.camel@joe2Laptop> (raw)
In-Reply-To: <20120117.135227.1766844710849171296.davem@davemloft.net>
On Tue, 2012-01-17 at 13:52 -0500, David Miller wrote:
> From: Joe Perches <joe@perches.com>
> Date: Tue, 17 Jan 2012 10:51:13 -0800
>
> > On Tue, 2012-01-17 at 13:46 -0500, David Miller wrote:
> >> From: Joe Perches <joe@perches.com>
> >> Date: Tue, 17 Jan 2012 10:37:13 -0800
> >> > Passing NULL to %pNF is done in skb_gso_segment
> >> > which could be dereferenced.
> >> skb_gso_segment() should be fixed instead.
> >
> > Maybe. Dereferencing NULL is bad form.
>
> We don't check for NULL for IPV4 or IPV6 addresses,
Because we don't pass NULL addresses.
> no reason
> to treat this any differently.
A NULL address is specifically passed here.
> Either do it for all %pX things, or none of them.
Maybe.
next prev parent reply other threads:[~2012-01-17 18:54 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-17 18:37 [PATCH] vsprintf: Prevent NULL dereference using %pNF Joe Perches
2012-01-17 18:46 ` David Miller
2012-01-17 18:51 ` Joe Perches
2012-01-17 18:52 ` David Miller
2012-01-17 18:54 ` Joe Perches [this message]
2012-01-17 18:59 ` David Miller
2012-01-17 19:39 ` Michał Mirosław
2012-01-17 19:43 ` Joe Perches
2012-01-17 21:12 ` Michał Mirosław
2012-01-18 2:43 ` Joe Perches
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