linux-kernel - Re: [RFC PATCH 0/3] irq: Fix stack overflow due to softirq called on current stack

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:	Thu, 19 Sep 2013 10:38:41 -0500
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Paul Mackerras <paulus@...ba.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@....ibm.com>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	James Hogan <james.hogan@...tec.com>,
	"James E.J. Bottomley" <jejb@...isc-linux.org>,
	Helge Deller <deller@....de>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	"David S. Miller" <davem@...emloft.net>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RFC PATCH 0/3] irq: Fix stack overflow due to softirq called on
 current stack

2013/9/18 Paul Mackerras <paulus@...ba.org>:
> Frederic,
>
> On Thu, Sep 05, 2013 at 05:33:21PM +0200, Frederic Weisbecker wrote:
>>
>> This series is a proposition to fix the crash reported here: http://lkml.kernel.org/r/1378330796.4321.50.camel%40pasglop
>> And it has the upside to also consolidate a bit the arch do_softirq overriden implementation.
>
> I tried this series on a ppc64 machine running KVM guests and doing
> network traffic, while under memory pressure, and it seems to work
> fine.  Although the original problem was never completely
> deterministically reproducible, the problem did originally show up
> with the combination of memory pressure, network traffic and KVM
> guests.  I pushed the test machine moderately hard for a while and
> there was no sign of stack overflow.  So:
>
> Tested-by: Paul Mackerras <paulus@...ba.org>

Thanks!

>
> Are you going to push this upstream?

Yeah I'll prepare a pull request and let Thomas decide about the fate
of these patches.

Thanks!
--
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/