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Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs [message #6028 is a reply to message #6018]

Wed, 06 September 2006 23:23

fernando
Messages: 1
Registered: September 2006

Junior Member

On Wed, 2006-09-06 at 13:20 -0700, Linus Torvalds wrote:
>
> On Mon, 4 Sep 2006, Kirill Korotaev wrote:
> >
> > +#ifdef __KERNEL__
> > +#define arch_mmap_check ia64_mmap_check
> > +#ifndef __ASSEMBLY__
> > +int ia64_mmap_check(unsigned long addr, unsigned long len,
> > + unsigned long flags);
> > +#endif
> > +#endif
>
> Btw, is there some reason for the __ASSEMBLY__ check?
>
> I'm not seeing any kernel users that could care, a quick
>
> git grep 'mman\.h' -- '*.[sS]'
>
> doesn't trigger anything, and the other header files that include this
> seem to all either be mman.h themselves, or have things like structure
> declarations etc that wouldn't work for any non-C source anyway.
>
> But maybe I missed some.
>
> I'd rather not have more of those '#ifndef __ASSEMBLY__' than necessary

The problem is that "asm/mman.h" is being included from entry.S indirectly
through "asm/pgtable.h" (see code snips below).

* arch/ia64/kernel/entry.S:
...
#include <asm/pgtable.h>
...

* include/asm-ia64/pgtable.h:
...
#include <asm/mman.h>
...

* include/asm-ia64/mman.h
...
#ifdef __KERNEL__
#define arch_mmap_check ia64_map_check_rgn
int ia64_map_check_rgn(unsigned long addr, unsigned long len,
unsigned long flags);
#endif
...

Without this fix compilation is broken:

gcc -Wp,-MD,arch/ia64/kernel/.entry.o.d -nostdinc -isystem /usr/lib/gcc/ia64-linux-gnu/4.1.2/include -D__KERNEL__ -Iinclude -include include/linux/autoconf.h -DHAVE_WORKING_TEXT_ALIGN -DHAVE_MODEL_SMALL_ATTRIBUTE -DHAVE_SERIALIZE_DIRECTIVE -D__ASSEMBLY__ -mconstant-gp -c -o arch/ia64/kernel/entry.o arch/ia64/kernel/entry.S
include/asm/mman.h: Assembler messages:
include/asm/mman.h:13: Error: Unknown opcode `int ia64_map_check_rgn(unsigned long addr,unsigned long len,'
include/asm/mman.h:14: Error: Unknown opcode `unsigned long flags)'
make[1]: *** [arch/ia64/kernel/entry.o] Error 1
make: *** [arch/ia64/kernel] Error 2

Regards,

Fernando

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[Message index]

		[PATCH] IA64,sparc: local DoS with corrupted ELFs By: Kirill Korotaev on Mon, 04 September 2006 12:14
		Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs By: Kyle McMartin on Tue, 05 September 2006 11:39
		Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs By: dev on Tue, 05 September 2006 13:06
		Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs By: Linus Torvalds on Wed, 06 September 2006 18:24
		Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs By: Matthew Wilcox on Wed, 06 September 2006 18:27
		Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs By: Arjan van de Ven on Wed, 06 September 2006 19:06
		Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs By: Jes Sorensen on Fri, 08 September 2006 09:12
		Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs By: Kirill Korotaev on Thu, 07 September 2006 10:14
		Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs By: Linus Torvalds on Thu, 07 September 2006 15:17
		Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs By: Willy Tarreau on Thu, 07 September 2006 20:07
		Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs By: Andrew Morton on Thu, 07 September 2006 23:42
		Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs By: Willy Tarreau on Fri, 08 September 2006 04:34
		Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs By: dev on Fri, 08 September 2006 15:12
		Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs By: Linus Torvalds on Fri, 08 September 2006 15:35
		Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs By: dev on Fri, 08 September 2006 16:06
		Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs By: rdunlap on Wed, 13 September 2006 15:45
		Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs By: Dave Jones on Fri, 08 September 2006 15:49
		Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs By: Linus Torvalds on Wed, 06 September 2006 20:20
		Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs By: fernando on Wed, 06 September 2006 23:23
		Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs By: tony.luck on Wed, 06 September 2006 21:27

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