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]
Date:	Thu, 30 May 2013 16:10:54 -0600
From:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
To:	Stepan Moskovchenko <stepanm@...eaurora.org>
Cc:	Russell King <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org, David Brown <davidb@...eaurora.org>,
	Bryan Huntsman <bryanh@...eaurora.org>,
	Daniel Walker <dwalker@...o99.com>
Subject: Re: [PATCH] arm: Prevent memory aliasing on non-LPAE kernels

On Thu, May 30, 2013 at 02:45:20PM -0700, Stepan Moskovchenko wrote:
>  void __init early_init_dt_add_memory_arch(u64 base, u64 size)
>  {
> +#ifndef CONFIG_ARM_LPAE
> +	if (base > ((phys_addr_t)~0)) {

The #ifdef is probably not necessary here, simply checking that
base/size can be represented in a phys_addr_t is enough.

> +		pr_crit("Ignoring memory at 0x%08llx due to lack of LPAE support\n",
> +			base);
> +		return;
> +	}
> +
> +	if (size > ((phys_addr_t)~0))
> +		size = ((phys_addr_t)~0);

A similar printk as arm_add_memory for this one too?

                printk(KERN_CRIT "Truncating memory at 0x%08llx to fit in "
                        "32-bit physical address space\n", (long long)start);

Regards,
Jason
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists