Messages in this thread | | | Subject | Re: [PATCH] IA64,sparc: local DoS with corrupted ELFs | From | Fernando Luis Vázquez Cao <> | Date | Thu, 07 Sep 2006 08:23:11 +0900 |
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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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