** Changed in: linux (Ubuntu)
Status: New => In Progress
** Changed in: linux (Ubuntu)
Importance: Undecided => High
** Changed in: linux (Ubuntu)
Assignee: Ubuntu on IBM Power Systems Bug Triage (ubuntu-power-triage) =>
Joseph Salisbury (jsalisbury)
** Also affects: linux (Ubuntu Bionic)
Importance: High
Assignee: Joseph Salisbury (jsalisbury)
Status: In Progress
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https://bugs.launchpad.net/bugs/1750441
Title:
Boston-LC:bos1u1: Stress test on Qlogic Fibre Channel on Ubuntu KVM
guest that caused KVM host crashed in qlt_free_session_done call
Status in The Ubuntu-power-systems project:
New
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Bionic:
In Progress
Bug description:
Problem Description:
=============
- PCI passthru Qlogic Fibre Channel adapter from Ubuntu 18.04 KVM host to
Ubuntu 18.04 KVM guest.
- Stress test on Qlogic Fibre Channel on Ubuntu KVM guest caused KVM
host crashed in qlt_free_session_done call.
- Below stack traces from KVM host:
91:mon> t
[c000200e4e81fb60] c00800001162f044 qlt_free_session_done+0x4ec/0x680
[qla2xxx] (unreliable)
[c000200e4e81fc90] c00000000012fbb8 process_one_work+0x298/0x5a0
[c000200e4e81fd20] c00000000012ff58 worker_thread+0x98/0x630
[c000200e4e81fdc0] c000000000138ae8 kthread+0x1a8/0x1b0
[c000200e4e81fe30] c00000000000b528 ret_from_kernel_thread+0x5c/0xb4
91:mon> e
cpu 0x91: Vector: 300 (Data Access) at [c000200e4e81f8e0]
pc: c00800001162ed58: qlt_free_session_done+0x200/0x680 [qla2xxx]
lr: c00800001162eca8: qlt_free_session_done+0x150/0x680 [qla2xxx]
sp: c000200e4e81fb60
msr: 900000000280b033
dar: 20
dsisr: 40000000
current = 0xc000200e4e7b0e00
paca = 0xc00000000fae3b00 softe: 0 irq_happened: 0x01
pid = 1119, comm = kworker/145:1
Linux version 4.15.0-041500rc9-generic (kernel@tangerine) (gcc version 7.2.0
(Ubuntu 7.2.0-6ubuntu1)) #201801212130 SMP Mon Jan 22 03:36:42 UTC 2018
91:mon> r
R00 = c00800001162eca8 R16 = 0000000000000000
R01 = c000200e4e81fb60 R17 = 0000000000000000
R02 = c00800001166ad60 R18 = 0000000000000000
R03 = 0000000000000001 R19 = 0000000000000000
R04 = c000200e44f8c7f8 R20 = c000200e618e7d80
R05 = 000000000000f087 R21 = 0000000000000000
R06 = c00800001165e6c8 R22 = 0000000000000001
R07 = c00800001164adb0 R23 = c000200e44f99d24
R08 = 0000000000000000 R24 = 0000000000000402
R09 = 0000000000000000 R25 = 0000000000000000
R10 = 0000000000000000 R26 = c000000fe1270c20
R11 = c00800001163e170 R27 = c000200e44f99000
R12 = c000000000cfccf0 R28 = c00800001164adb0
R13 = c00000000fae3b00 R29 = c000000fe1270c00
R14 = c000000000138948 R30 = c000200e44f8c7f8
R15 = c000200e4f019440 R31 = c000000fe1270cc0
pc = c00800001162ed58 qlt_free_session_done+0x200/0x680 [qla2xxx]
cfar= c00800001162ed1c qlt_free_session_done+0x1c4/0x680 [qla2xxx]
lr = c00800001162eca8 qlt_free_session_done+0x150/0x680 [qla2xxx]
msr = 900000000280b033 cr = 28002284
ctr = c000000000cfccf0 xer = 0000000000000000 trap = 300
dar = 0000000000000020 dsisr = 40000000
91:mon>
The crash location seems close to this one fixed about two weeks ago:
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-
next.git/commit/drivers/scsi/qla2xxx/qla_os.c?h=next-20180212&id=2ce87cc5b269510de9ca1185ca8a6e10ec78c069
scsi: qla2xxx: Fix memory corruption during hba reset test
This patch fixes memory corrpution while performing HBA Reset test.
Following stack trace is seen:
[ 466.397219] BUG: unable to handle kernel NULL pointer dereference at
0000000000000020
[ 466.433669] IP: [<ffffffffc06f5dd0>] qlt_free_session_done+0x260/0x5f0
[qla2xxx]
[ 466.467731] PGD 0
[ 466.476718] Oops: 0000 [#1] SMP
- Luciano built and provided the patch with new Qlogic change on
Friday last week.
root@bos1u1p1:~/chavez# ls linux-image*
linux-image-4.15.0-041500rc9-generic_4.15.0-041500rc9.201801212130_ppc64el.deb
linux-image-extra-4.15.0-041500rc9-generic_4.15.0-041500rc9.201801212130_ppc64el.deb
- I configured and ran same test over weekend and test ran good. KVM
host did not crash in qlt_free_session_done call like before.
- So the patch fixed the problem.
Hi Canonical,
Please review and consider this a request to pull in commit
2ce87cc5b269510de9ca1185ca8a6e10ec78c069 please. Thanks!
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