From: Joe Perches <joe@perches.com>
To: "Michał Mirosław" <mirq-linux@rere.qmqm.pl>
Cc: David Miller <davem@davemloft.net>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] vsprintf: Prevent NULL dereference using %pNF
Date: Tue, 17 Jan 2012 11:43:40 -0800 [thread overview]
Message-ID: <1326829420.17202.21.camel@joe2Laptop> (raw)
In-Reply-To: <20120117193910.GA17092@rere.qmqm.pl>
On Tue, 2012-01-17 at 20:39 +0100, Michał Mirosław wrote:
> On Tue, Jan 17, 2012 at 10:51:13AM -0800, Joe Perches wrote:
> > 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.
> > Michał Mirosław should fix that as it's his patch.
>
> Will do. This is in WARN() and easily fixed.
>
> > noinline_for_stack should be added anyway.
>
> Why? There are no local variables there and inlining this function would
> actually save stack space as no stack frame would be created for the call.
Isn't an additional copy of "struct printf_spec spec" on the stack
in function pointer() now?
next prev parent reply other threads:[~2012-01-17 19:43 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
2012-01-17 18:59 ` David Miller
2012-01-17 19:39 ` Michał Mirosław
2012-01-17 19:43 ` Joe Perches [this message]
2012-01-17 21:12 ` Michał Mirosław
2012-01-18 2:43 ` Joe Perches
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