linux-kernel - Re: StackProtector Oopses

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1022.1208829867@turing-police.cc.vt.edu>
Date:	Mon, 21 Apr 2008 22:04:27 -0400
From:	Valdis.Kletnieks@...edu
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Reuben Farrelly <reuben-linuxkernel@...b.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: StackProtector Oopses - Re: 2.6.25-mm1

On Mon, 21 Apr 2008 18:48:59 PDT, Arjan van de Ven said:

Typo alert?

> diff --git a/kernel/panic.c b/kernel/panic.c
> index c92c1e2..b4a6a05 100644
> --- a/kernel/panic.c
> +++ b/kernel/panic.c
> @@ -351,7 +351,10 @@ static noinline void __stack_chk_test_func(void)
>  	}
>  #endif
>  	barrier();
> -	memset(&foo, 0, 2*sizeof(foo)); /* deliberate buffer overflow */
> +	if (current->stack_canary == *(((unsigned long *)&foo)+1))
> +		*(((unsigned long *)&foo)+1) = 0;
> +	else
> +		printk(KERN_ERR "No -ftack-protector canary found\n");
                                     -fstack?
>  	barrier();
>  }


Content of type "application/pgp-signature" skipped