netdev - Re: [PATCH 3/9] Fix leaking of kernel heap addresses in net/

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Date:	Sun, 07 Nov 2010 18:11:12 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Dan Rosenberg <drosenberg@...curity.com>
Cc:	chas@....nrl.navy.mil, davem@...emloft.net, kuznet@....inr.ac.ru,
	pekkas@...core.fi, jmorris@...ei.org, yoshfuji@...ux-ipv6.org,
	kaber@...sh.net, remi.denis-courmont@...ia.com,
	netdev@...r.kernel.org, security@...nel.org, stable@...nel.org
Subject: Re: [PATCH 3/9] Fix leaking of kernel heap addresses in net/

Le dimanche 07 novembre 2010 à 11:31 -0500, Dan Rosenberg a écrit :
> Signed-off-by: Dan Rosenberg <drosenberg@...curity.com>
> 
> diff -urp linux-2.6.37-rc1.orig/net/ipv4/af_inet.c linux-2.6.37-rc1/net/ipv4/af_inet.c
> --- linux-2.6.37-rc1.orig/net/ipv4/af_inet.c	2010-11-01 07:54:12.000000000 -0400
> +++ linux-2.6.37-rc1/net/ipv4/af_inet.c	2010-11-07 10:31:41.000000000 -0500
> @@ -139,12 +139,13 @@ void inet_sock_destruct(struct sock *sk)
>  	sk_mem_reclaim(sk);
>  
>  	if (sk->sk_type == SOCK_STREAM && sk->sk_state != TCP_CLOSE) {
> -		pr_err("Attempt to release TCP socket in state %d %p\n",
> -		       sk->sk_state, sk);
> +		pr_err("Attempt to release TCP socket in state %d %lu\n",
> +		       sk->sk_state, sock_i_ino(sk));
>  		return;
>  	}

Why a non root user can read this debugging stuff, I ask.

I suggest "dmesg" for them sends them a Windows XP system log,
and /proc/cpuinfo pretends machine is a Z80, somewhat modified to have
65536 cores.



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