linux-kernel - Re: [BUG 2.6.30] Bad page map in process

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]

Message-ID: <20090712095731.3090ef56@siona>
Date:	Sun, 12 Jul 2009 09:57:31 +0200
From:	Haavard Skinnemoen <haavard.skinnemoen@...el.com>
To:	Hugh Dickins <hugh.dickins@...cali.co.uk>
Cc:	Guennadi Liakhovetski <g.liakhovetski@....de>, linux-mm@...ck.org,
	kernel@...32linux.org, linux-kernel@...r.kernel.org
Subject: Re: [BUG 2.6.30] Bad page map in process

On Fri, 10 Jul 2009 19:34:06 +0100 (BST)
Hugh Dickins <hugh.dickins@...cali.co.uk> wrote:

> I've not looked up avr32 pte layout, is 13f26ed4 good or bad?
> I hope avr32 people can tell more about the likely cause.

It looks OK for a user mapping, assuming you have at least 64MB of
SDRAM (the SDRAM starts at 0x10000000) -- all the normal userspace flags
are set and all the kernel-only flags are unset. It's marked as
executable, so it could be that the segfault was caused by the CPU
executing the wrong code.

The virtual address 0x4377f876 is a bit higher than what you normally
see on avr32 systems, but there's not necessarily anything wrong with
it -- userspace goes up to 0x80000000.

Btw, is preempt enabled when you see this?

Haavard
--
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/