linux-kernel - Re: BPF crash with 3.18-rc1 on arm64 Juno hardware

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]

Message-ID: <544A2B4B.3050207@arm.com>
Date:	Fri, 24 Oct 2014 11:34:51 +0100
From:	Andre Przywara <andre.przywara@....com>
To:	Catalin Marinas <catalin.marinas@....com>,
	Z Lim <zlim.lnx@...il.com>
CC:	Will Deacon <Will.Deacon@....com>,
	LAKML <linux-arm-kernel@...ts.infradead.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: BPF crash with 3.18-rc1 on arm64 Juno hardware

Hi,

On 24/10/14 11:31, Catalin Marinas wrote:
> On Thu, Oct 23, 2014 at 06:23:49PM +0100, Z Lim wrote:
>> On Thu, Oct 23, 2014 at 10:00 AM, Andre Przywara <andre.przywara@....com> wrote:
>>> I see a crash with 3.18-rc1 on a Juno board related to bpf_jit (see dump
>>> below). Userland tries to carry on afterwards, but eventually hangs in
>>> RCU stalls.
>>> The kernel has just CONFIG_BPF_JIT enabled, I guess Ubuntu enables this
>>> automatically if detected.
>>
>> When net-next and arm64-next merged in mainline, a silent failure is
>> introduced due to new enhancements in net/bpf.
>> This was actually uncovered before 3.18 merge window, and Daniel's
>> patch to fix this was discussed here [1].
>> I see that Catalin has queued up this patch in fixes/core [2].
>
> Indeed. Pull request to Linus will go out later today.

Indeed this patch fixes it for me.
Thanks to both of you!

Cheers,
Andre.

-- IMPORTANT NOTICE: The contents of this email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please notify the sender immediately and do not disclose the contents to any other person, use it for any purpose, or store or copy the information in any medium.  Thank you.

ARM Limited, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England & Wales, Company No:  2557590
ARM Holdings plc, Registered office 110 Fulbourn Road, Cambridge CB1 9NJ, Registered in England & Wales, Company No:  2548782

--
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/