linux-kernel - Re: [BUG] perf: bogus correlation of kernel symbols

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

Date:	Thu, 12 May 2011 14:37:41 -0400
From:	Dave Jones <davej@...hat.com>
To:	David Miller <davem@...emloft.net>
Cc:	eranian@...gle.com, acme@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [BUG] perf: bogus correlation of kernel symbols

On Thu, May 12, 2011 at 02:06:30PM -0400, David Miller wrote:
 > From: Stephane Eranian <eranian@...gle.com>
 > Date: Thu, 12 May 2011 16:48:46 +0200
 > 
 > > I think there is a serious problem with kernel symbol correlation
 > > with the latest perf in 2.6.39-rc7-tip.
 > 
 > The behavior seems to be intentional, so that we don't expose internal
 > kernel addresses to userspace.

Sounds like commit 9f36e2c448007b54851e7e4fa48da97d1477a175

 > I hate this too, and I think it's absolutely rediculous.
 > 
 > Also, like you, I lost an entire afternoon trying to figure out why
 > this started happening.
 > 
 > I wish we could revert this change.

At least it can be permanently disabled..

echo kernel.kptr_restrict = 0 >> /etc/sysctl.conf

	Dave

--
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/