From: Arjan van de Ven
Date: Wed Feb 27 2013 - 17:56:16 EST

On 2/27/2013 2:45 PM, Stephen Rothwell wrote:
Hi all,

On Wed, 27 Feb 2013 14:19:16 -0800 "H. Peter Anvin" <hpa@xxxxxxxxx> wrote:

Although some of the cases I have seen being flagged as "false
positives" have been real bugs.

[hijacking the thread :-)]

I have been getting this warning for a very long time ( which would be an

i386 defconfig
i386-linux-gcc (GCC) 4.6.3

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.2':
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]

the gcc folks finally fixed that one it seems

(but while there are some false positives, esp with older gcc, the majority were real originally.. just those all got fixed)

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