From: Stephen Boyd <sboyd@codeaurora.org>
To: akpm@linux-foundation.org
Cc: Randy Dunlap <rdunlap@infradead.org>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-next@vger.kernel.org
Subject: Re: mmotm 2013-03-01-15-50 uploaded (strict user copy)
Date: Thu, 14 Mar 2013 10:48:18 -0700 [thread overview]
Message-ID: <51420D62.7030701@codeaurora.org> (raw)
In-Reply-To: <5131753F.3070302@codeaurora.org>
On 03/01/13 19:42, Stephen Boyd wrote:
> On 03/01/13 19:00, Randy Dunlap wrote:
>> on i386:
>>
>> ERROR: "copy_from_user_overflow" [fs/binfmt_misc.ko] undefined!
>>
>> which I don't understand.
>> lib/usercopy.o is built and building binfmt_misc.c says:
>>
>> CC [M] fs/binfmt_misc.o
>> In file included from arch/x86/include/asm/uaccess.h:537:0,
>> from include/linux/uaccess.h:5,
>> from include/linux/highmem.h:8,
>> from include/linux/pagemap.h:10,
>> from fs/binfmt_misc.c:27:
>> arch/x86/include/asm/uaccess_32.h: In function 'parse_command.part.1':
>> arch/x86/include/asm/uaccess_32.h:211:26: warning: call to 'copy_from_user_overflow' declared with attribute warning: copy_from_user() buffer size is not provably correct [enabled by default]
> Hm.. That's because it's part of lib and not obj, right?
>
> diff --git a/lib/Makefile b/lib/Makefile
> index 59fabd0..4c55104 100644
> --- a/lib/Makefile
> +++ b/lib/Makefile
> @@ -15,7 +15,7 @@ lib-y := ctype.o string.o vsprintf.o cmdline.o \
> is_single_threaded.o plist.o decompress.o kobject_uevent.o \
> earlycpio.o percpu-refcount.o
>
> -lib-$(CONFIG_ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS) += usercopy.o
> +obj-$(CONFIG_ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS) += usercopy.o
> lib-$(CONFIG_MMU) += ioremap.o
> lib-$(CONFIG_SMP) += cpumask.o
>
>
Andrew, can you squash this into "Kconfig: consolidate
CONFIG_DEBUG_STRICT_USER_COPY_CHECKS"?
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
hosted by The Linux Foundation
next prev parent reply other threads:[~2013-03-14 17:48 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-01 23:51 mmotm 2013-03-01-15-50 uploaded akpm
2013-03-01 23:51 ` akpm
2013-03-01 23:51 ` akpm
2013-03-02 3:00 ` mmotm 2013-03-01-15-50 uploaded (strict user copy) Randy Dunlap
2013-03-02 3:42 ` Stephen Boyd
2013-03-02 4:16 ` Stephen Boyd
2013-03-02 5:22 ` Randy Dunlap
2013-03-14 17:48 ` Stephen Boyd [this message]
2013-03-14 21:16 ` Randy Dunlap
2013-03-02 3:05 ` mmotm 2013-03-01-15-50 uploaded (early_printk) Randy Dunlap
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