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From: Eugene Teo <eugene.teo@eugeneteo.net>
To: kernel-janitors@vger.kernel.org
Subject: Re: [Kernel-janitors] [PATCH] Check return value of __copy_from_user
Date: Fri, 09 Jan 2004 00:54:05 +0000	[thread overview]
Message-ID: <20040109005405.GA8656@eugeneteo.net> (raw)
In-Reply-To: <20040103132946.GE21909@eugeneteo.net>

<quote sender="Randy.Dunlap">
> On Sun, 4 Jan 2004 16:25:50 +0800 Eugene Teo <eugene.teo@eugeneteo.net> wrote:
> 
> | Patch compiles, and tested. Please apply.
> | 
> | http://www.anomalistic.org/patches/fpu_entry-check-ret-__copy_to_user-fix-2.6.1-rc1-mm1.patch
> | 
> | diff -Naur -X /home/amnesia/w/dontdiff 2.6.1-rc1-mm1/arch/i386/math-emu/fpu_entry.c 2.6.1-rc1-mm1-fix/arch/i386/math-emu/fpu_entry.c
> | --- 2.6.1-rc1-mm1/arch/i386/math-emu/fpu_entry.c	2004-01-04 16:22:38.000000000 +0800
> | +++ 2.6.1-rc1-mm1-fix/arch/i386/math-emu/fpu_entry.c	2004-01-04 16:09:20.000000000 +0800
> | @@ -686,7 +686,8 @@
> |  
> |    RE_ENTRANT_CHECK_OFF;
> |    FPU_verify_area(VERIFY_READ, d, 7*4 + 8*10);
> | -  __copy_from_user(&S387->cwd, d, 7*4);
> | +  if (__copy_from_user(&S387->cwd, d, 7*4))
> | +    return -1;
> |    RE_ENTRANT_CHECK_ON;
> |  
> |    d += 7*4;
> 
> This one is confusing to me.  I don't see where/why the patch is
> needed since the BK sources already have this if() test and return.
> Did -mm patches unfix this somehow?
> I'm not planning to look thru the -mm patches to see what happened here.

I will look at it, and get back to you.

> 
> --
> ~Randy
> MOTD:  Always include version info.
> 

-- 
Eugene TEO   <eugeneteo@eugeneteo.net>   <http://www.anomalistic.org/>
1024D/14A0DDE5 print D851 4574 E357 469C D308  A01E 7321 A38A 14A0 DDE5
main(i) { putchar(182623909 >> (i-1) * 5&31|!!(i<7)<<6) && main(++i); }

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  parent reply	other threads:[~2004-01-09  0:54 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-01-03 13:29 [Kernel-janitors] [PATCH] Check return value in mm/memory.c Eugene Teo
2004-01-03 13:30 ` [Kernel-janitors] [PATCH] Check return value in Eugene Teo
2004-01-03 13:31 ` [Kernel-janitors] [PATCH] Check return value in net/ipv4/ipmr.c Eugene Teo
2004-01-03 13:31 ` [Kernel-janitors] [PATCH] Check return value in fs/cifs/file.c Eugene Teo
2004-01-03 22:31 ` [Kernel-janitors] [PATCH] Check return value in mm/memory.c Matthew Wilcox
2004-01-03 22:35 ` [Kernel-janitors] [PATCH] Check return value in Matthew Wilcox
2004-01-03 22:37 ` [Kernel-janitors] [PATCH] Check return value in net/ipv4/ipmr.c Matthew Wilcox
2004-01-04  2:39 ` [Kernel-janitors] [PATCH] Check return value in Eugene Teo
2004-01-04  2:45 ` [Kernel-janitors] [PATCH] Check return value in net/ipv4/ipmr.c Eugene Teo
2004-01-04  3:32 ` [Kernel-janitors] [PATCH] Check return value in mm/memory.c Eugene Teo
2004-01-04  7:58 ` [Kernel-janitors] [PATCH] Check return value in Eugene Teo
2004-01-04  8:07 ` Eugene Teo
2004-01-04  8:25 ` [Kernel-janitors] [PATCH] Check return value of __copy_from_user Eugene Teo
2004-01-04  8:47 ` [Kernel-janitors] [PATCH] Check return value of kernel_thread Eugene Teo
2004-01-08  0:45 ` [Kernel-janitors] [PATCH] Check return value in Randy.Dunlap
2004-01-08 12:18 ` Eugene Teo
2004-01-09  0:25 ` [Kernel-janitors] [PATCH] Check return value of __copy_from_user Randy.Dunlap
2004-01-09  0:54 ` Eugene Teo [this message]
2004-01-09  1:17 ` Eugene Teo

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