linux-kernel - Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs

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Message-ID: <20060905113939.GA5130@tachyon.int.mcmartin.ca>
Date:	Tue, 5 Sep 2006 07:39:39 -0400
From:	Kyle McMartin <kyle@...isc-linux.org>
To:	Kirill Korotaev <dev@...nvz.org>
Cc:	Linus Torvalds <torvalds@...l.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Fernando Vazquez <fernando@....ntt.co.jp>,
	"David S. Miller" <davem@...emloft.net>, tony.luck@...el.com,
	linux-ia64@...r.kernel.org, stable@...nel.org, xemul@...nvz.org,
	devel@...nvz.org
Subject: Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs

On Mon, Sep 04, 2006 at 04:17:00PM +0400, Kirill Korotaev wrote:
> --- a/include/asm-generic/mman.h
> +++ b/include/asm-generic/mman.h
> @@ -39,4 +39,10 @@ #define MADV_DOFORK	11		/* do inherit ac
> #define MAP_ANON	MAP_ANONYMOUS
> #define MAP_FILE	0
> 
> +#ifdef __KERNEL__
> +#ifndef arch_mmap_check
> +#define arch_mmap_check(addr, len, flags)	(0)
> +#endif
> +#endif
> +
> #endif

This breaks all arches that don't use asm-generic/mman.h, and that you
didn't add arch_mmap_check to asm/mman.h for.
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