| 2020-02-06 06:18:34 |
Po-Hsu Lin |
bug |
|
|
added bug |
| 2020-02-06 06:18:45 |
Po-Hsu Lin |
tags |
|
eoan sru-20200127 ubuntu-ltp |
|
| 2020-02-06 06:19:01 |
Po-Hsu Lin |
tags |
eoan sru-20200127 ubuntu-ltp |
5.3 eoan sru-20200127 ubuntu-ltp |
|
| 2020-02-06 06:19:07 |
Po-Hsu Lin |
bug task added |
|
linux (Ubuntu) |
|
| 2020-02-06 06:19:22 |
Po-Hsu Lin |
summary |
pty03 from ubuntu_ltp failed on Eoan |
pty03 from pty in ubuntu_ltp failed on Eoan |
|
| 2020-02-06 06:19:29 |
Po-Hsu Lin |
nominated for series |
|
Ubuntu Eoan |
|
| 2020-02-06 06:19:29 |
Po-Hsu Lin |
bug task added |
|
linux (Ubuntu Eoan) |
|
| 2020-02-06 06:22:35 |
Po-Hsu Lin |
linux (Ubuntu Eoan): status |
New |
Confirmed |
|
| 2020-02-06 06:22:55 |
Po-Hsu Lin |
description |
startup='Thu Feb 6 02:45:23 2020'
tst_test.c:1215: INFO: Timeout per run is 0h 05m 00s
pty03.c:101: INFO: Creating PTY with SLIP line discipline
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Cannot kill test processes!
Congratulation, likely test hit a kernel bug.
Exitting uncleanly...
tag=pty03 stime=1580957123 dur=350 exit=exited stat=1 core=no cu=0 cs=0 |
startup='Thu Feb 6 02:45:23 2020'
tst_test.c:1215: INFO: Timeout per run is 0h 05m 00s
pty03.c:101: INFO: Creating PTY with SLIP line discipline
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Cannot kill test processes!
Congratulation, likely test hit a kernel bug.
Exitting uncleanly...
tag=pty03 stime=1580957123 dur=350 exit=exited stat=1 core=no cu=0 cs=0
This is a new test case, so it's not a regression. |
|
| 2020-02-06 06:30:09 |
Ubuntu Kernel Bot |
linux (Ubuntu): status |
New |
Incomplete |
|
| 2020-02-06 06:39:15 |
Po-Hsu Lin |
nominated for series |
|
Ubuntu Bionic |
|
| 2020-02-06 06:39:15 |
Po-Hsu Lin |
bug task added |
|
linux (Ubuntu Bionic) |
|
| 2020-02-06 06:59:16 |
Po-Hsu Lin |
linux (Ubuntu): status |
Incomplete |
Confirmed |
|
| 2020-02-06 06:59:21 |
Po-Hsu Lin |
linux (Ubuntu Bionic): status |
New |
Confirmed |
|
| 2020-02-06 06:59:25 |
Po-Hsu Lin |
ubuntu-kernel-tests: status |
New |
Confirmed |
|
| 2020-02-06 07:11:06 |
Po-Hsu Lin |
nominated for series |
|
Ubuntu Xenial |
|
| 2020-02-06 07:11:06 |
Po-Hsu Lin |
bug task added |
|
linux (Ubuntu Xenial) |
|
| 2020-02-06 07:11:16 |
Po-Hsu Lin |
linux (Ubuntu Xenial): status |
New |
Confirmed |
|
| 2020-02-06 08:09:04 |
Po-Hsu Lin |
nominated for series |
|
Ubuntu Disco |
|
| 2020-02-06 08:09:04 |
Po-Hsu Lin |
bug task added |
|
linux (Ubuntu Disco) |
|
| 2020-02-06 08:36:05 |
Po-Hsu Lin |
linux (Ubuntu Bionic): status |
Confirmed |
In Progress |
|
| 2020-02-06 08:36:08 |
Po-Hsu Lin |
linux (Ubuntu Bionic): assignee |
|
Po-Hsu Lin (cypressyew) |
|
| 2020-02-06 08:36:10 |
Po-Hsu Lin |
ubuntu-kernel-tests: assignee |
|
Po-Hsu Lin (cypressyew) |
|
| 2020-02-06 08:36:15 |
Po-Hsu Lin |
ubuntu-kernel-tests: status |
Confirmed |
In Progress |
|
| 2020-02-06 10:37:17 |
Po-Hsu Lin |
description |
startup='Thu Feb 6 02:45:23 2020'
tst_test.c:1215: INFO: Timeout per run is 0h 05m 00s
pty03.c:101: INFO: Creating PTY with SLIP line discipline
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Cannot kill test processes!
Congratulation, likely test hit a kernel bug.
Exitting uncleanly...
tag=pty03 stime=1580957123 dur=350 exit=exited stat=1 core=no cu=0 cs=0
This is a new test case, so it's not a regression. |
== Justification ==
The test case pty03 from pty in ubuntu_ltp is failing with kernel NULL
pointer dereference:
[ 951.306823] BUG: kernel NULL pointer dereference, address: 0000000000000020
[ 951.309960] #PF: supervisor write access in kernel mode
[ 951.312130] #PF: error_code(0x0002) - not-present page
[ 951.314227] PGD 0 P4D 0
[ 951.315278] Oops: 0002 [#1] SMP PTI
[ 951.316705] CPU: 1 PID: 39102 Comm: pty03 Not tainted 5.4.0-12-generic #15-Ubuntu
[ 951.319737] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014
[ 951.322713] RIP: 0010:queue_work_on+0x1b/0x50
[ 951.352494] Call Trace:
[ 951.353244] slip_write_wakeup+0x25/0x30 [slip]
[ 951.354600] tty_wakeup+0x5b/0x70
[ 951.355539] pty_unthrottle+0x19/0x30
[ 951.356560] tty_unthrottle+0x42/0x60
[ 951.357566] __tty_perform_flush+0x87/0x90
[ 951.358768] n_tty_ioctl_helper+0xcc/0x150
[ 951.359955] n_tty_ioctl+0x2d/0x100
[ 951.360930] tty_ioctl+0x3c0/0x8e0
[ 951.361882] ? __switch_to_asm+0x34/0x70
[ 951.363049] ? __switch_to_asm+0x40/0x70
[ 951.364191] ? __switch_to_asm+0x34/0x70
[ 951.365261] ? __switch_to_asm+0x40/0x70
[ 951.366382] ? __switch_to_asm+0x34/0x70
[ 951.367452] ? __switch_to_asm+0x40/0x70
[ 951.368523] ? __switch_to_asm+0x34/0x70
[ 951.369693] ? __switch_to_asm+0x40/0x70
[ 951.370829] ? __switch_to_asm+0x34/0x70
[ 951.371923] ? __switch_to_asm+0x40/0x70
[ 951.372998] ? __switch_to_asm+0x34/0x70
[ 951.374097] ? __switch_to_asm+0x40/0x70
[ 951.375183] ? __switch_to_asm+0x34/0x70
[ 951.376288] ? __switch_to_asm+0x40/0x70
[ 951.377390] ? __switch_to+0x110/0x470
[ 951.378863] do_vfs_ioctl+0x407/0x670
[ 951.380269] ? __schedule+0x2eb/0x740
[ 951.381761] ksys_ioctl+0x67/0x90
[ 951.383076] __x64_sys_ioctl+0x1a/0x20
[ 951.384510] do_syscall_64+0x57/0x190
[ 951.385896] entry_SYSCALL_64_after_hwframe+0x44/0xa9
== Fixes ==
Indicated by the test case, this issue can be fixed by:
* 0ace17d5 (can, slip: Protect tty->disc_data in write_wakeup and
close with RCU)
This patch can be cherry-picked into all of our kernels.
== Test ==
Test kernels could be found here:
https://people.canonical.com/~phlin/kernel/lp-1862114-pty03/
Tested on KVM nodes and the patched kernels work as expected, there
will be no more kernel null pointer dereference issue, and the test
can finish properly.
== Regression potential ==
Low, changes limited to two specific drivers for serial line TTY. This
issue can be reproduced quite easily and the patched kernels show
positive results.
== Original Bug Report ==
startup='Thu Feb 6 02:45:23 2020'
tst_test.c:1215: INFO: Timeout per run is 0h 05m 00s
pty03.c:101: INFO: Creating PTY with SLIP line discipline
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Test timeouted, sending SIGKILL!
Cannot kill test processes!
Congratulation, likely test hit a kernel bug.
Exitting uncleanly...
tag=pty03 stime=1580957123 dur=350 exit=exited stat=1 core=no cu=0 cs=0
This is a new test case, so it's not a regression. |
|
| 2020-02-06 10:37:19 |
Po-Hsu Lin |
linux (Ubuntu): status |
Confirmed |
In Progress |
|
| 2020-02-06 10:37:30 |
Po-Hsu Lin |
linux (Ubuntu): assignee |
|
Po-Hsu Lin (cypressyew) |
|
| 2020-02-06 10:37:36 |
Po-Hsu Lin |
linux (Ubuntu Eoan): assignee |
|
Po-Hsu Lin (cypressyew) |
|
| 2020-02-06 10:37:39 |
Po-Hsu Lin |
linux (Ubuntu Disco): assignee |
|
Po-Hsu Lin (cypressyew) |
|
| 2020-02-06 10:37:46 |
Po-Hsu Lin |
linux (Ubuntu Xenial): assignee |
|
Po-Hsu Lin (cypressyew) |
|
| 2020-02-06 10:38:13 |
Po-Hsu Lin |
linux (Ubuntu Xenial): status |
Confirmed |
In Progress |
|
| 2020-02-06 10:38:15 |
Po-Hsu Lin |
linux (Ubuntu Disco): status |
New |
In Progress |
|
| 2020-02-06 10:38:18 |
Po-Hsu Lin |
linux (Ubuntu Eoan): status |
Confirmed |
In Progress |
|
| 2020-02-14 04:24:44 |
Khaled El Mously |
linux (Ubuntu Xenial): status |
In Progress |
Fix Committed |
|
| 2020-02-14 04:24:46 |
Khaled El Mously |
linux (Ubuntu Bionic): status |
In Progress |
Fix Committed |
|
| 2020-02-14 04:24:48 |
Khaled El Mously |
linux (Ubuntu Disco): status |
In Progress |
Fix Committed |
|
| 2020-02-14 04:24:51 |
Khaled El Mously |
linux (Ubuntu Eoan): status |
In Progress |
Fix Committed |
|
| 2020-02-17 21:02:19 |
Ubuntu Kernel Bot |
tags |
5.3 eoan sru-20200127 ubuntu-ltp |
5.3 eoan sru-20200127 ubuntu-ltp verification-needed-xenial |
|
| 2020-02-17 21:28:39 |
Ubuntu Kernel Bot |
tags |
5.3 eoan sru-20200127 ubuntu-ltp verification-needed-xenial |
5.3 eoan sru-20200127 ubuntu-ltp verification-needed-bionic verification-needed-xenial |
|
| 2020-02-17 22:52:06 |
Ubuntu Kernel Bot |
tags |
5.3 eoan sru-20200127 ubuntu-ltp verification-needed-bionic verification-needed-xenial |
5.3 eoan sru-20200127 ubuntu-ltp verification-needed-bionic verification-needed-eoan verification-needed-xenial |
|
| 2020-02-18 06:44:38 |
Po-Hsu Lin |
tags |
5.3 eoan sru-20200127 ubuntu-ltp verification-needed-bionic verification-needed-eoan verification-needed-xenial |
5.3 eoan sru-20200127 ubuntu-ltp verification-done-bionic verification-needed-eoan verification-needed-xenial |
|
| 2020-03-05 07:03:05 |
Po-Hsu Lin |
tags |
5.3 eoan sru-20200127 ubuntu-ltp verification-done-bionic verification-needed-eoan verification-needed-xenial |
5.3 eoan sru-20200127 ubuntu-ltp verification-done-bionic verification-done-eoan verification-needed-xenial |
|
| 2020-03-05 07:14:26 |
Po-Hsu Lin |
tags |
5.3 eoan sru-20200127 ubuntu-ltp verification-done-bionic verification-done-eoan verification-needed-xenial |
5.3 eoan sru-20200127 ubuntu-ltp verification-done-bionic verification-done-eoan verification-done-xenial |
|
| 2020-03-05 07:14:46 |
Po-Hsu Lin |
ubuntu-kernel-tests: status |
In Progress |
Fix Released |
|
| 2020-03-05 08:05:21 |
Sean Feole |
tags |
5.3 eoan sru-20200127 ubuntu-ltp verification-done-bionic verification-done-eoan verification-done-xenial |
5.3 eoan sru-20200127 sru-20200217 ubuntu-ltp verification-done-bionic verification-done-eoan verification-done-xenial |
|
| 2020-03-16 10:39:46 |
Launchpad Janitor |
linux (Ubuntu Eoan): status |
Fix Committed |
Fix Released |
|
| 2020-03-16 10:39:46 |
Launchpad Janitor |
cve linked |
|
2019-3016 |
|
| 2020-03-16 10:39:46 |
Launchpad Janitor |
cve linked |
|
2020-2732 |
|
| 2020-03-16 10:53:57 |
Launchpad Janitor |
linux (Ubuntu Bionic): status |
Fix Committed |
Fix Released |
|
| 2020-03-16 10:53:57 |
Launchpad Janitor |
cve linked |
|
2019-14615 |
|
| 2020-03-16 10:53:57 |
Launchpad Janitor |
cve linked |
|
2020-8832 |
|
| 2020-03-16 14:25:28 |
Launchpad Janitor |
linux (Ubuntu Xenial): status |
Fix Committed |
Fix Released |
|
| 2020-03-30 08:31:37 |
Po-Hsu Lin |
linux (Ubuntu): status |
In Progress |
Fix Released |
|
| 2020-07-02 20:02:44 |
Steve Langasek |
linux (Ubuntu Disco): status |
Fix Committed |
Won't Fix |
|
