linux-kernel - Re: 2.6.33-rc1 build failure: copy_from_user() buffer size is not provably correct

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Message-Id: <20091221180537.089C.A69D9226@jp.fujitsu.com>
Date:	Mon, 21 Dec 2009 18:07:23 +0900 (JST)
From:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To:	Ritesh Raj Sarraf <rrs@...earchut.com>
Cc:	kosaki.motohiro@...fujitsu.com, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: 2.6.33-rc1 build failure: copy_from_user() buffer size is not provably correct

> This is triggered if using the 'allyesconfig' target.
> 
> A similar issue was this: 2886a8bdfa007053b414ab01741a98c18c376a85
> 
> 
> debian-build:/tmp/all-yes-config/2.6.33-rc1# make deb-pkg
> make KBUILD_SRC=                                         
>   CHK     include/linux/version.h                        
>   CHK     include/generated/utsrelease.h                 
>   CALL    scripts/checksyscalls.sh                       
>   CHK     include/generated/compile.h                    
>   VDSOSYM arch/x86/vdso/vdso32-int80-syms.lds
>   VDSOSYM arch/x86/vdso/vdso32-sysenter-syms.lds
>   VDSOSYM arch/x86/vdso/vdso32-syms.lds
>   LD      arch/x86/vdso/built-in.o
>   LD      arch/x86/built-in.o
>   CC      mm/migrate.o
> In file included from /tmp/all-yes-config/2.6.33-
> rc1/arch/x86/include/asm/uaccess.h:571,
>                  from include/linux/uaccess.h:5,
>                  from include/linux/highmem.h:6,
>                  from include/linux/pagemap.h:10,
>                  from include/linux/mempolicy.h:62,
>                  from include/linux/migrate.h:5,
>                  from mm/migrate.c:15:
> In function ‘copy_from_user’,
>     inlined from ‘do_pages_stat’ at mm/migrate.c:1009:
> /tmp/all-yes-config/2.6.33-rc1/arch/x86/include/asm/uaccess_32.h:213: error: 
> call to ‘copy_from_user_overflow’ declared with attribute error: 
> copy_from_user() buffer size is not provably correct

afaik, ingo already queued this fix.
please wait (very) few days.

thanks.




> make[3]: *** [mm/migrate.o] Error 1
> make[2]: *** [mm] Error 2
> make[1]: *** [deb-pkg] Error 2
> make: *** [deb-pkg] Error 2
> 
> 
> Regards,
> Ritesh
> -- 
> Given the large number of mailing lists I follow, I request you to CC me
> in replies for quicker response
> 
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