linux-kernel - Re: [PATCH v4 0/5] x86: Cleanup and simplify cpu-specific data

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Date:	Tue, 28 Feb 2012 00:31:02 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Kevin Winchester <kjwinchester@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Borislav Petkov <bp@...en8.de>,
	Randy Dunlap <rdunlap@...otime.net>,
	Nick Bowler <nbowler@...iptictech.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 0/5] x86: Cleanup and simplify cpu-specific data

Better yet, fix the problem...

Ingo Molnar <mingo@...e.hu> wrote:

>
>* H. Peter Anvin <hpa@...or.com> wrote:
>
>> >In function ‘copy_from_user’,
>> >     inlined from ‘pktgen_if_write’ at net/core/pktgen.c:877:20:
>>
>>/home/kevin/linux/linux-2.6/arch/x86/include/asm/uaccess_32.h:211:26:
>> >error: call to ‘copy_from_user_overflow’ declared with attribute
>> >error: copy_from_user() buffer size is not provably correct
>> >make[2]: *** [net/core/pktgen.o] Error 1
>> >
>> >On:
>> >
>> >gcc (GCC) 4.6.2 20120120 (prerelease)
>> >
>> >Is that my fault, or something else?
>> >
>> >Kevin
>> >
>> 
>> That comes from compiling with warnings as errors.  Not that someone
>> shouldn't look at that kind of problem.
>
>Can probably be worked around by disabling:
>
>CONFIG_DEBUG_STRICT_USER_COPY_CHECKS
>
>Thanks,
>
>	Ingo

-- 
Sent from my mobile phone. Please excuse my brevity and lack of formatting.
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