linux-kernel - Re: [PATCH] of/base: Fix PowerPC address parsing hack

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, 13 Nov 2014 09:10:36 +1100
From:	Stephen Rothwell <sfr@...b.auug.org.au>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	Rob Herring <robherring2@...il.com>,
	Grant Likely <grant.likely@...aro.org>,
	Olof Johansson <olof@...om.net>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>, linuxppc-dev@...abs.org
Subject: Re: [PATCH]  of/base: Fix PowerPC address parsing hack

Hi Ben,

Urk!  :-)

How about:

On Wed, 12 Nov 2014 16:51:01 +1100 Benjamin Herrenschmidt <benh@...nel.crashing.org> wrote:
>
> diff --git a/drivers/of/address.c b/drivers/of/address.c
> index e371825..e37f017 100644
> --- a/drivers/of/address.c
> +++ b/drivers/of/address.c
> @@ -7,6 +7,10 @@
>  #include <linux/pci_regs.h>
>  #include <linux/string.h>
>  
> +#ifdef CONFIG_PPC
> +#include <asm/machdep.h>

#define IS_PMAC	machine_is(pmac)
#else
#define IS_PMAC	(0)

> +#endif
> +
>  /* Max address size we deal with */
>  #define OF_MAX_ADDR_CELLS	4
>  #define OF_CHECK_ADDR_COUNT(na)	((na) > 0 && (na) <= OF_MAX_ADDR_CELLS)
> @@ -428,12 +432,13 @@ static int of_translate_one(struct device_node *parent, struct of_bus *bus,
>  	 * This code is only enabled on powerpc. --gcl
>  	 */
>  	ranges = of_get_property(parent, rprop, &rlen);
> -#if !defined(CONFIG_PPC)
> +#if defined(CONFIG_PPC)
> +	if (!machine_is(powermac))
> +#endif /* defined(CONFIG_PPC) */
>  	if (ranges == NULL) {

if ((!IS_PMAC) && (ranges == NULL)) {

> -		pr_err("OF: no ranges; cannot translate\n");
> +		pr_debug("OF: no ranges; cannot translate\n");
>  		return 1;
>  	}
> -#endif /* !defined(CONFIG_PPC) */
>  	if (ranges == NULL || rlen == 0) {
>  		offset = of_read_number(addr, na);
>  		memset(addr, 0, pna * 4);

There might be a better identifier than IS_PMAC ...

-- 
Cheers,
Stephen Rothwell                    sfr@...b.auug.org.au

Content of type "application/pgp-signature" skipped