linux-kernel - Re: [PATCH]Silancing a false positive: "may be used uninitialized"

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Mon, 21 Dec 2009 08:14:36 +1100
From:	Simon Horman <horms@...ge.net.au>
To:	Marin Mitov <mitov@...p.bas.bg>
Cc:	David Airlie <airlied@...ux.ie>,
	Jesse Barnes <jesse.barnes@...el.com>,
	dri-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: Re: [PATCH]Silancing a false positive: "may be used uninitialized"

On Sun, Dec 20, 2009 at 12:43:19PM +0200, Marin Mitov wrote:
> On Sunday 20 December 2009 11:56:44 am Simon Horman wrote:
> > On Sun, Dec 20, 2009 at 09:03:27AM +0200, Marin Mitov wrote:
> > > Hello all,
> > > 
> > > Silancing a false positive:
> > > warning: 'width' may be used uninitialized in this function
> > > drivers/gpu/drm/drm_edid.c
> > 
> > Is it guaranteed that the switch will always see a value covered by the
> > four cases it has? 
> 
> Yes it is. The value is masked (& 0xc0) so all the possible values are
> (0x00, 0x40, 0x80, 0xc0) covered by the switch. That's why it is false positive.

Of course, silly me.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/