| 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
| ||
|
Date: Mon, 16 May 2022 16:18:04 +0000
From: "Luck, Tony" <tony.luck@...el.com>
To: "Guilherme G. Piccoli" <gpiccoli@...lia.com>,
Petr Mladek <pmladek@...e.com>,
Dinh Nguyen <dinguyen@...nel.org>
CC: "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
"bhe@...hat.com" <bhe@...hat.com>,
"kexec@...ts.infradead.org" <kexec@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"bcm-kernel-feedback-list@...adcom.com"
<bcm-kernel-feedback-list@...adcom.com>,
"linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
"linux-alpha@...r.kernel.org" <linux-alpha@...r.kernel.org>,
"linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
"linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
"linux-leds@...r.kernel.org" <linux-leds@...r.kernel.org>,
"linux-mips@...r.kernel.org" <linux-mips@...r.kernel.org>,
"linux-parisc@...r.kernel.org" <linux-parisc@...r.kernel.org>,
"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
"linux-remoteproc@...r.kernel.org" <linux-remoteproc@...r.kernel.org>,
"linux-s390@...r.kernel.org" <linux-s390@...r.kernel.org>,
"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
"linux-um@...ts.infradead.org" <linux-um@...ts.infradead.org>,
"linux-xtensa@...ux-xtensa.org" <linux-xtensa@...ux-xtensa.org>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
"openipmi-developer@...ts.sourceforge.net"
<openipmi-developer@...ts.sourceforge.net>,
"rcu@...r.kernel.org" <rcu@...r.kernel.org>,
"sparclinux@...r.kernel.org" <sparclinux@...r.kernel.org>,
"xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>,
"x86@...nel.org" <x86@...nel.org>,
"kernel-dev@...lia.com" <kernel-dev@...lia.com>,
"kernel@...ccoli.net" <kernel@...ccoli.net>,
"halves@...onical.com" <halves@...onical.com>,
"fabiomirmar@...il.com" <fabiomirmar@...il.com>,
"alejandro.j.jimenez@...cle.com" <alejandro.j.jimenez@...cle.com>,
"andriy.shevchenko@...ux.intel.com"
<andriy.shevchenko@...ux.intel.com>,
"arnd@...db.de" <arnd@...db.de>, "bp@...en8.de" <bp@...en8.de>,
"corbet@....net" <corbet@....net>,
"d.hatayama@...fujitsu.com" <d.hatayama@...fujitsu.com>,
"dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
"dyoung@...hat.com" <dyoung@...hat.com>,
"Tang, Feng" <feng.tang@...el.com>,
"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
"mikelley@...rosoft.com" <mikelley@...rosoft.com>,
"hidehiro.kawai.ez@...achi.com" <hidehiro.kawai.ez@...achi.com>,
"jgross@...e.com" <jgross@...e.com>,
"john.ogness@...utronix.de" <john.ogness@...utronix.de>,
"keescook@...omium.org" <keescook@...omium.org>,
"luto@...nel.org" <luto@...nel.org>,
"mhiramat@...nel.org" <mhiramat@...nel.org>,
"mingo@...hat.com" <mingo@...hat.com>,
"paulmck@...nel.org" <paulmck@...nel.org>,
"peterz@...radead.org" <peterz@...radead.org>,
"rostedt@...dmis.org" <rostedt@...dmis.org>,
"senozhatsky@...omium.org" <senozhatsky@...omium.org>,
"stern@...land.harvard.edu" <stern@...land.harvard.edu>,
"tglx@...utronix.de" <tglx@...utronix.de>,
"vgoyal@...hat.com" <vgoyal@...hat.com>,
"vkuznets@...hat.com" <vkuznets@...hat.com>,
"will@...nel.org" <will@...nel.org>, Alex Elder <elder@...nel.org>,
Alexander Gordeev <agordeev@...ux.ibm.com>,
Anton Ivanov <anton.ivanov@...bridgegreys.com>,
Benjamin Herrenschmidt <benh@...nel.crashing.org>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
Boris Ostrovsky <boris.ostrovsky@...cle.com>,
Chris Zankel <chris@...kel.net>,
Christian Borntraeger <borntraeger@...ux.ibm.com>,
"Corey Minyard" <minyard@....org>,
Dexuan Cui <decui@...rosoft.com>,
"H. Peter Anvin" <hpa@...or.com>,
Haiyang Zhang <haiyangz@...rosoft.com>,
"Heiko Carstens" <hca@...ux.ibm.com>, Helge Deller <deller@....de>,
Ivan Kokshaysky <ink@...assic.park.msu.ru>,
"James E.J. Bottomley" <James.Bottomley@...senpartnership.com>,
James Morse <james.morse@....com>,
Johannes Berg <johannes@...solutions.net>,
"K. Y. Srinivasan" <kys@...rosoft.com>,
Mathieu Poirier <mathieu.poirier@...aro.org>,
"Matt Turner" <mattst88@...il.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Max Filippov <jcmvbkbc@...il.com>,
Michael Ellerman <mpe@...erman.id.au>,
Paul Mackerras <paulus@...ba.org>, Pavel Machek <pavel@....cz>,
"Richard Weinberger" <richard@....at>,
Robert Richter <rric@...nel.org>,
"Stefano Stabellini" <sstabellini@...nel.org>,
Stephen Hemminger <sthemmin@...rosoft.com>,
Sven Schnelle <svens@...ux.ibm.com>,
"Vasily Gorbik" <gor@...ux.ibm.com>, Wei Liu <wei.liu@...nel.org>
Subject: RE: [PATCH 21/30] panic: Introduce the panic pre-reboot notifier list
> So, my reasoning here is: this notifier should fit the info list,
> definitely! But...it's very high risk for kdump. It deep dives into the
> regmap API (there are locks in such code) plus there is an (MM)IO write
> to the device and an ARM firmware call. So, despite the nature of this
> notifier _fits the informational list_, the _code is risky_ so we should
> avoid running it before a kdump.
>
> Now, we indeed have a chicken/egg problem: want to avoid it before
> kdump, BUT in case kdump is not set, kmsg_dump() (and console flushing,
> after your suggestion Petr) will run before it and not save collected
> information from EDAC PoV.
Would it be possible to have some global "kdump is configured + enabled" flag?
Then notifiers could make an informed choice on whether to deep dive to
get all the possible details (when there is no kdump) or just skim the high
level stuff (to maximize chance of getting a successful kdump).
-Tony
Powered by blists - more mailing lists