From: "Witold Baryluk" <baryluk@smp.if.uj.edu.pl>
To: Jiri Kosina <jkosina@suse.cz>
Cc: Harry Wei <jiaweiwei.xiyou@gmail.com>,
Andy Lutomirski <luto@MIT.EDU>, Greg KH <greg@kroah.com>,
Andres More <more.andres@gmail.com>,
Joe Perches <joe@perches.com>,
linux-kernel@vger.kernel.org, devel@driverdev.osuosl.org,
Ilia Mirkin <imirkin@alum.mit.edu>
Subject: Re: [Oops 1/2]Something wrong with copy_from_user() function - possible false positive due bug in gcc 4.6
Date: Tue, 31 May 2011 02:38:26 +0200 [thread overview]
Message-ID: <20110531003826.GD14366@smp.if.uj.edu.pl> (raw)
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Hi.
You my wantto look here
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48880
and
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46639
It is regression in gcc 4.6
Particulry this error happens in binfmt_misc.c file.
gcc 4.6 errornously print error in this file.
However I could not find such behavior
nowhere in rest of kernel. But it can still
be a case If you use gcc 4.6.
If you are using gcc 4.5 or older, it is probably
genuine error, or someone is using a destination
buffer which is unknown size and gcc cannot
prove it is big enaugh to hold data.
--
Witold Baryluk
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reply other threads:[~2011-05-31 0:38 UTC|newest]
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