search for: ldisc

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=896...

...1:10:14PM +0300, Pasi K?rkk?inen wrote: > > > 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". > > > > Crashes with "normal" operation, or crashes when running a fuzzer or > > other type of program? > > For me it crashed on boot. > Nathan said he's getting the crashes at runtime, randomly, but often. > > >...

On 08/30/2017 03:10 PM, Pasi K?rkk?inen wrote: > 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/tor...

...53AM -0500, Johnny Hughes wrote: > On 08/30/2017 03:10 PM, Pasi K?rkk?inen wrote: > > 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.or...

> > I have no issues rolling this patch in , while we wait on upstream, if > > it makes our tree more stable. > > > > I think we should do that.. What do others think? > I've had the patch deployed to a group of 32 hosts (with hundreds of vms) for about 10 days now and no sign of any issues. So I support it =) Cheers, Nathan

On 09/20/2017 03:10 AM, Pasi K?rkk?inen wrote: > On Tue, Sep 05, 2017 at 10:49:13AM -0700, Nathan March wrote: >>>> I have no issues rolling this patch in , while we wait on upstream, if >>>> it makes our tree more stable. >>>> >>> >>> I think we should do that.. What do others think? >>> >> >> I've had the patch

On Tue, Sep 05, 2017 at 10:49:13AM -0700, Nathan March wrote: > > > I have no issues rolling this patch in , while we wait on upstream, if > > > it makes our tree more stable. > > > > > > > I think we should do that.. What do others think? > > > > I've had the patch deployed to a group of 32 hosts (with hundreds of vms) > for about 10

On Tue, Jan 23, 2018 at 4:50 PM, Nathan March <nathan at gt.net> wrote: > Hi, > > > Hmm.. isn't this the ldisc bug that was discussed a few months ago on > this > list, > > and a patch was applied to virt-sig kernel aswell? > > > > Call trace looks similar.. > > Good memory! I'd forgotten about that despite being the one who ran into > it. > > Looks like that patch...

Hello everyone, Some of you might remember discussions earlier in 2017 (huh, long time ago) on centos-virt list about Linux kernel tty/ldisc related bug, which caused Xen dom0 kernel crashes for some people (and also more easy to trigger crashes on other arches, like on hp pa-risc), but the bug was difficult to reproduce for others/most people. Fix for this issue was merged to centos virt-sig Linux 4.9.48-29 kernel earlier in 2017, but...

...Stange wrote: > On 01/23/2018 05:57 PM, Karl Johnson wrote: > > > > > > On Tue, Jan 23, 2018 at 4:50 PM, Nathan March <nathan at gt.net > > <mailto:nathan at gt.net>> wrote: > > > > Hi, > > > > > Hmm.. isn't this the ldisc bug that was discussed a few months ago on this > > list, > > > and a patch was applied to virt-sig kernel aswell? > > > > > > Call trace looks similar.. > > > > Good memory! I'd forgotten about that despite being the one who ran...

.... -- Pasi > Karl > > On Sat, Feb 9, 2019 at 10:32 AM Pasi K??rkk??inen <[4]pasik at iki.fi> wrote: > > Hello everyone, > > Some of you might remember discussions earlier in 2017 (huh, long time > ago) on centos-virt list about Linux kernel tty/ldisc related bug, which > caused Xen dom0 kernel crashes for some people (and also more easy to > trigger crashes on other arches, like on hp pa-risc), but the bug was > difficult to reproduce for others/most people. > > Fix for this issue was merged to centos virt-si...

...gb > dca ptp pps_core uas usb_storage wmi ttm > [64929.007327] CPU: 15 PID: 17696 Comm: kworker/u48:0 Not tainted > 4.9.75-30.el6.x86_64 #1 > [64929.007343] Hardware name: Dell Inc. PowerEdge C6220/03C9JJ, BIOS 2.7.1 > 03/04/2015 > [64929.007362] Workqueue: events_unbound flush_to_ldisc > [64929.007376] task: ffff8801fbc70580 task.stack: ffffc90048af8000 > [64929.007415] RIP: e030:[<ffffffff81533a24>] [<ffffffff81533a24>] > n_tty_receive_buf_common+0xa4/0x1f0 > [64929.007465] RSP: e02b:ffffc90048afbb08 EFLAGS: 00010296 > [64929.007476] RAX: 00000000000...

...opti621 ns87415 hpt366 hpt34x generic cy82c693 cs5530 cs5520 cmd64x amd74xx alim15x3 aec62xx pdc202xx _new unix ext2 ext3 jbd mbcache dm_mod raid5 xor raid1 md sd_mod ata_piix libata scsi_mod piix ide_core Apr 5 20:00:21 sydlxfw01 kernel: CPU: 0 Apr 5 20:00:21 sydlxfw01 kernel: EIP: 0060:[tty_ldisc_ref_wait+144/192] Tainted: P VLI Apr 5 20:00:21 sydlxfw01 kernel: EFLAGS: 00010286 (2.6.11-1-ntf) Apr 5 20:00:21 sydlxfw01 kernel: EIP is at tty_ldisc_ref_wait+0x90/0xc0 Apr 5 20:00:21 sydlxfw01 kernel: eax: 00000221 ebx: dde3b00c ecx: c01f3ce0 edx: de120000 Apr 5 20:00:21 sydl...

...te: > >>> > >>> > >>> On Tue, Jan 23, 2018 at 4:50 PM, Nathan March <nathan at gt.net > >>> <mailto:nathan at gt.net>> wrote: > >>> > >>> Hi, > >>> > >>> > Hmm.. isn't this the ldisc bug that was discussed a few months ago > on this > >>> list, > >>> > and a patch was applied to virt-sig kernel aswell? > >>> > > >>> > Call trace looks similar.. > >>> > >>> Good memory! I'...

Hi, > Hmm.. isn't this the ldisc bug that was discussed a few months ago on this list, > and a patch was applied to virt-sig kernel aswell? > > Call trace looks similar.. Good memory! I'd forgotten about that despite being the one who ran into it. Looks like that patch was just removed in 4.9.75-30 which I just upg...

On 01/23/2018 05:57 PM, Karl Johnson wrote: > > > On Tue, Jan 23, 2018 at 4:50 PM, Nathan March <nathan at gt.net > <mailto:nathan at gt.net>> wrote: > > Hi, > > > Hmm.. isn't this the ldisc bug that was discussed a few months ago on this > list, > > and a patch was applied to virt-sig kernel aswell? > > > > Call trace looks similar.. > > Good memory! I'd forgotten about that despite being the one who ran > into it. > >...

...On 01/23/2018 05:57 PM, Karl Johnson wrote: >>> >>> >>> On Tue, Jan 23, 2018 at 4:50 PM, Nathan March <nathan at gt.net >>> <mailto:nathan at gt.net>> wrote: >>> >>> Hi, >>> >>> > Hmm.. isn't this the ldisc bug that was discussed a few months ago on this >>> list, >>> > and a patch was applied to virt-sig kernel aswell? >>> > >>> > Call trace looks similar.. >>> >>> Good memory! I'd forgotten about that despite bein...

...Hat 7.3.1-5) (GCC) ) #1 SMP Sun Feb 10 11:20:04 EST 2019 Karl On Sat, Feb 9, 2019 at 10:32 AM Pasi K?rkk?inen <pasik at iki.fi> wrote: > Hello everyone, > > Some of you might remember discussions earlier in 2017 (huh, long time > ago) on centos-virt list about Linux kernel tty/ldisc related bug, which > caused Xen dom0 kernel crashes for some people (and also more easy to > trigger crashes on other arches, like on hp pa-risc), but the bug was > difficult to reproduce for others/most people. > > Fix for this issue was merged to centos virt-sig Linux 4.9.48-29 ker...

...> > On Sat, Feb 9, 2019 at 10:32 AM Pasi K??rkk??inen <[4]pasik at iki.fi> wrote: > > > > Hello everyone, > > > > Some of you might remember discussions earlier in 2017 (huh, long time > > ago) on centos-virt list about Linux kernel tty/ldisc related bug, which > > caused Xen dom0 kernel crashes for some people (and also more easy to > > trigger crashes on other arches, like on hp pa-risc), but the bug was > > difficult to reproduce for others/most people. > > > > Fix for this issue was...

...at 10:32 AM Pasi K??rkk??inen <[4]pasik at iki.fi> > wrote: > > > > > > Hello everyone, > > > > > > Some of you might remember discussions earlier in 2017 (huh, long > time > > > ago) on centos-virt list about Linux kernel tty/ldisc related > bug, which > > > caused Xen dom0 kernel crashes for some people (and also more > easy to > > > trigger crashes on other arches, like on hp pa-risc), but the bug > was > > > difficult to reproduce for others/most people. > > > &gt...