From: "Pasi Kärkkäinen" <pasik@iki.fi>
To: Mikulas Patocka <mpatocka@redhat.com>
Cc: Michael Neuling <mikey@neuling.org>,
Dmitry Vyukov <dvyukov@google.com>,
Stephen Rothwell <sfr@canb.auug.org.au>,
Peter Hurley <peter@hurleysoftware.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Nathan March <nathan@gt.net>,
centos-virt@centos.org, linux-kernel@vger.kernel.org
Subject: Status of reverted Linux patch "tty: Fix ldisc crash on reopened tty", Linux 4.9 kernel frequent crashes
Date: Wed, 30 Aug 2017 23:10:14 +0300 [thread overview]
Message-ID: <20170830201014.GO4090@reaktio.net> (raw)
Hello everyone,
Recently Nathan March reported on centos-virt list he's getting frequent Linux kernel crashes with Linux 4.9 LTS kernel because of the missing patch "tty: Fix ldisc crash on reopened tty".
The patch was already merged upstream here:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=71472fa9c52b1da27663c275d416d8654b905f05
but then reverted here:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=896d81fefe5d1919537db2c2150ab6384e4a6610
Nathan confirmed if he applies the patch from 71472fa9c52b1da27663c275d416d8654b905f05 to his Linux 4.9 LTS kernel the bug/problem goes away, so the patch (or similar fix) is still needed, at least for 4.9 LTS kernel.
Mikulas reported he's able to trigger the same crash on Linux 4.10:
https://www.spinics.net/lists/kernel/msg2440637.html
https://lists.gt.net/linux/kernel/2664604?search_string=ldisc%20reopened;#2664604
Michael Neuling reported he's able to trigger the bug on PowerPC:
https://lkml.org/lkml/2017/3/10/1582
So now the question is.. is anyone currently working on getting this patch fixed and applied upstream? I think one of the problems earlier was being able to reliable reproduce the crash.. Nathan says he's able to reproduce it many times per week on his environment on x86_64.
Thanks a lot,
-- Pasi
next reply other threads:[~2017-08-30 20:15 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-30 20:10 Pasi Kärkkäinen [this message]
2017-08-31 4:36 ` Status of reverted Linux patch "tty: Fix ldisc crash on reopened tty", Linux 4.9 kernel frequent crashes Greg Kroah-Hartman
2017-08-31 5:22 ` Michael Neuling
2017-09-01 12:59 ` Pasi Kärkkäinen
2017-09-01 20:48 ` Mikulas Patocka
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170830201014.GO4090@reaktio.net \
--to=pasik@iki.fi \
--cc=centos-virt@centos.org \
--cc=dvyukov@google.com \
--cc=gregkh@linuxfoundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mikey@neuling.org \
--cc=mpatocka@redhat.com \
--cc=nathan@gt.net \
--cc=peter@hurleysoftware.com \
--cc=sfr@canb.auug.org.au \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.