Comment # 3
on bug 1218948
from Jonathan Lundquist
Don't know if this is useful, but this is from my var/log/messages at the time
of encountering a bug with the same lockup, immediately after updating to:
Kernel 5.14.21-150500.55.44.1.
------------------------------------------------------------------------------
Of particular interest:
"2024-01-18T21:26:37.988262-05:00 localhost kernel: [ 11.866020][ T186] BUG:
kernel NULL pointer dereference, address: 0000000000000010"
and
"Workqueue: usb_hub_wq hub_event [usbcore]"
Also issues with i915 in second excerpt, but could be related to second monitor
plugged in on USB? I don't know enough about how it all works, but I hope this
helps. I can email you complete file.
------------------------------------------------------------------------------
The message I was getting on boot was:
BUG: workqueue lockup-pool cpus=1 node=0 flags 0x0 nice=0 stuck ...
------------------------------------------------------------------------------
2024-01-18T21:26:37.988262-05:00 localhost kernel: [ 11.866020][ T186] BUG:
kernel NULL pointer dereference, address: 0000000000000010
2024-01-18T21:26:37.988263-05:00 localhost kernel: [ 11.866027][ T186] #PF:
supervisor write access in kernel mode
2024-01-18T21:26:37.988264-05:00 localhost kernel: [ 11.866031][ T186] #PF:
error_code(0x0002) - not-present page
2024-01-18T21:26:37.988269-05:00 localhost kernel: [ 11.866035][ T186] PGD 0
P4D 0
2024-01-18T21:26:37.988270-05:00 localhost kernel: [ 11.866041][ T186] Oops:
0002 [#1] PREEMPT SMP NOPTI
2024-01-18T21:26:37.988271-05:00 localhost kernel: [ 11.866047][ T186] CPU:
1 PID: 186 Comm: kworker/1:2 Tainted: G U OE X N
5.14.21-150500.55.44-default #1 SLE15-SP5
90deee2e83cde463eb967901034adf4c20e0d408
2024-01-18T21:26:37.988272-05:00 localhost kernel: [ 11.866055][ T186]
Hardware name: Dell Inc. XPS 9315/00KRKP, BIOS 1.7.1 01/04/2023
2024-01-18T21:26:37.988273-05:00 localhost kernel: [ 11.866058][ T186]
Workqueue: usb_hub_wq hub_event [usbcore]
2024-01-18T21:26:37.988273-05:00 localhost kernel: [ 11.866091][ T186] RIP:
0010:ax88179_disconnect+0x15/0x30 [ax88179_178a]
2024-01-18T21:26:37.988277-05:00 localhost kernel: [ 11.866100][ T186] Code:
c7 c0 0a 00 00 31 c9 e9 59 9e fc ff 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00
48 8b 87 a8 00 00 00 48 85 c0 74 0d 48 8b 40 20 <c6> 40 10 01 e9 22 43 fd ff c3
cc cc cc cc 66 66 2e 0f 1f 84 00 00
2024-01-18T21:26:37.988278-05:00 localhost kernel: [ 11.866105][ T186] RSP:
0018:ffffa95ec0587c48 EFLAGS: 00010286
2024-01-18T21:26:37.988279-05:00 localhost kernel: [ 11.866110][ T186] RAX:
0000000000000000 RBX: ffff95e606427830 RCX: 0000000000000000
2024-01-18T21:26:37.988279-05:00 localhost kernel: [ 11.866114][ T186] RDX:
0000000000000001 RSI: ffff95e601fd3600 RDI: ffff95e606427800
2024-01-18T21:26:37.988280-05:00 localhost kernel: [ 11.866117][ T186] RBP:
ffffffffc1ca5070 R08: 0000000000000000 R09: ffffa95ec0587ba8
2024-01-18T21:26:37.988281-05:00 localhost kernel: [ 11.866120][ T186] R10:
0000000000000282 R11: ffff95e614601e01 R12: ffff95e618c4b800
2024-01-18T21:26:37.988285-05:00 localhost kernel: [ 11.866124][ T186] R13:
ffff95e618c4b8a8 R14: ffff95e606427800 R15: ffff95e606427830
2024-01-18T21:26:37.988286-05:00 localhost kernel: [ 11.866127][ T186] FS:
0000000000000000(0000) GS:ffff95ed6f640000(0000) knlGS:0000000000000000
2024-01-18T21:26:37.988286-05:00 localhost kernel: [ 11.866132][ T186] CS:
0010 DS: 0000 ES: 0000 CR0: 0000000080050033
2024-01-18T21:26:37.988287-05:00 localhost kernel: [ 11.866135][ T186] CR2:
0000000000000010 CR3: 00000007e6c10000 CR4: 0000000000750ee0
2024-01-18T21:26:37.988288-05:00 localhost kernel: [ 11.866139][ T186] PKRU:
55555554
2024-01-18T21:26:37.988288-05:00 localhost kernel: [ 11.866142][ T186] Call
Trace:
2024-01-18T21:26:37.988289-05:00 localhost kernel: [ 11.866147][ T186]
<TASK>
2024-01-18T21:26:37.988293-05:00 localhost kernel: [ 11.866151][ T186]
usb_unbind_interface+0x73/0x260 [usbcore
2cb9e578f1bd04e43add18acac9ca64aebc6323d]
2024-01-18T21:26:37.988294-05:00 localhost kernel: [ 11.866184][ T186] ?
kernfs_find_ns+0x35/0xc0
2024-01-18T21:26:37.988295-05:00 localhost kernel: [ 11.866193][ T186]
device_release_driver_internal+0x201/0x220
2024-01-18T21:26:37.988295-05:00 localhost kernel: [ 11.866202][ T186]
bus_remove_device+0xd8/0x150
2024-01-18T21:26:37.988296-05:00 localhost kernel: [ 11.866208][ T186]
device_del+0x18d/0x3f0
2024-01-18T21:26:37.988297-05:00 localhost kernel: [ 11.866213][ T186] ?
usb_remove_ep_devs+0x1b/0x30 [usbcore 2cb9e578f1bd04e43add18acac9ca64aebc6323d]
2024-01-18T21:26:37.988301-05:00 localhost kernel: [ 11.866242][ T186]
usb_disable_device+0x8d/0x1a0 [usbcore
2cb9e578f1bd04e43add18acac9ca64aebc6323d]
2024-01-18T21:26:37.988302-05:00 localhost kernel: [ 11.866272][ T186]
usb_disconnect+0xbf/0x270 [usbcore 2cb9e578f1bd04e43add18acac9ca64aebc6323d]
2024-01-18T21:26:37.988302-05:00 localhost kernel: [ 11.866299][ T186]
hub_event+0x534/0x1940 [usbcore 2cb9e578f1bd04e43add18acac9ca64aebc6323d]
2024-01-18T21:26:37.988303-05:00 localhost kernel: [ 11.866327][ T186]
process_one_work+0x264/0x440
2024-01-18T21:26:37.988304-05:00 localhost kernel: [ 11.866335][ T186]
worker_thread+0x2d/0x3c0
2024-01-18T21:26:37.988304-05:00 localhost kernel: [ 11.866341][ T186] ?
process_one_work+0x440/0x440
2024-01-18T21:26:37.988308-05:00 localhost kernel: [ 11.866346][ T186]
kthread+0x154/0x180
2024-01-18T21:26:37.988309-05:00 localhost kernel: [ 11.866351][ T186] ?
set_kthread_struct+0x50/0x50
2024-01-18T21:26:37.988310-05:00 localhost kernel: [ 11.866356][ T186]
ret_from_fork+0x1f/0x30
------------------------------------------------------------------------------
2024-01-18T21:27:03.476361-05:00 localhost kernel: [ 62.537614][ C0] BUG:
workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 50s!
2024-01-18T21:27:03.476389-05:00 localhost kernel: [ 62.537649][ C0]
Showing busy workqueues and worker pools:
2024-01-18T21:27:03.476391-05:00 localhost kernel: [ 62.537656][ C0]
workqueue events: flags=0x0
2024-01-18T21:27:03.476392-05:00 localhost kernel: [ 62.537663][ C0] pwq
2: cpus=1 node=0 flags=0x0 nice=0 active=13/256 refcnt=15
2024-01-18T21:27:03.476394-05:00 localhost kernel: [ 62.537669][ C0]
pending: free_work, intel_atomic_helper_free_state_worker [i915],
kfree_rcu_monitor, kernfs_notify_workfn, iwl_mvm_tcm_work [iwlmvm],
once_deferred, once_deferred, delayed_fput, cgroup_bpf_release,
iwl_mvm_async_handlers_wk [iwlmvm], __intel_wakeref_put_work [i915],
free_user_ns, drm_mode_rmfb_work_fn [drm] BAR(1711)
2024-01-18T21:27:03.476396-05:00 localhost kernel: [ 62.538088][ C0]
workqueue events_unbound: flags=0x2
2024-01-18T21:27:03.476397-05:00 localhost kernel: [ 62.538107][ C0] pwq
24: cpus=0-11 flags=0x4 nice=0 active=6/512 refcnt=16
2024-01-18T21:27:03.476397-05:00 localhost kernel: [ 62.538113][ C0]
in-flight: 93:fsnotify_connector_destroy_workfn
fsnotify_connector_destroy_workfn, 90:fsnotify_mark_destroy_workfn
fsnotify_mark_destroy_workfn BAR(3780) BAR(1) BAR(3346) BAR(2944) BAR(3034)
BAR(3072) BAR(2139) BAR(2822), 1134:pxp_session_work [i915] pxp_session_work
[i915]
2024-01-18T21:27:03.476399-05:00 localhost kernel: [ 62.538346][ C0]
workqueue rcu_gp: flags=0x8
2024-01-18T21:27:03.476400-05:00 localhost kernel: [ 62.538363][ C0] pwq
2: cpus=1 node=0 flags=0x0 nice=0 active=2/256 refcnt=3
2024-01-18T21:27:03.476401-05:00 localhost kernel: [ 62.538368][ C0]
pending: process_srcu, wait_rcu_exp_gp
2024-01-18T21:27:03.476402-05:00 localhost kernel: [ 62.538378][ C0]
workqueue mm_percpu_wq: flags=0x8
2024-01-18T21:27:03.476403-05:00 localhost kernel: [ 62.538391][ C0] pwq
2: cpus=1 node=0 flags=0x0 nice=0 active=2/256 refcnt=4
2024-01-18T21:27:03.476404-05:00 localhost kernel: [ 62.538395][ C0]
pending: vmstat_update, lru_add_drain_per_cpu BAR(106)
2024-01-18T21:27:03.476405-05:00 localhost kernel: [ 62.538410][ C0]
workqueue pm: flags=0x4
2024-01-18T21:27:03.476406-05:00 localhost kernel: [ 62.538424][ C0] pwq
2: cpus=1 node=0 flags=0x0 nice=0 active=3/256 refcnt=4
2024-01-18T21:27:03.476407-05:00 localhost kernel: [ 62.538427][ C0]
pending: pm_runtime_work, pm_runtime_work, pm_runtime_work
2024-01-18T21:27:03.476408-05:00 localhost kernel: [ 62.538470][ C0]
workqueue usb_hub_wq: flags=0x4
2024-01-18T21:27:03.476409-05:00 localhost kernel: [ 62.538482][ C0] pwq
2: cpus=1 node=0 flags=0x0 nice=0 active=2/256 refcnt=3
2024-01-18T21:27:03.476410-05:00 localhost kernel: [ 62.538485][ C0]
in-flight: 2886:hub_event [usbcore]
2024-01-18T21:27:03.476411-05:00 localhost kernel: [ 62.538513][ C0]
pending: hub_event [usbcore]
2024-01-18T21:27:03.476411-05:00 localhost kernel: [ 62.538547][ C0] pool
2: cpus=1 node=0 flags=0x0 nice=0 hung=50s workers=3 idle: 22 134
2024-01-18T21:27:03.476413-05:00 localhost kernel: [ 62.538556][ C0] pool
24: cpus=0-11 flags=0x4 nice=0 hung=0s workers=16 idle: 1140 8 87 92 94 95 85
86 88 89 91 3729 1139
2024-01-18T21:27:03.476414-05:00 localhost kernel: [ 62.538573][ C0]
Showing backtraces of running workers in stalled CPU-bound worker pools:
2024-01-18T21:27:10.967232-05:00 localhost systemd-udevd[737]: eth0: Worker
[748] processing SEQNUM=5209 is taking a long time
2024-01-18T21:27:12.972739-05:00 localhost kded5[2235]: QDBusAbstractAdaptor:
Cannot relay signal KDEDModule::moduleDeleted(KDEDModule*): Pointers are not
supported: KDEDModule*
2024-01-18T21:27:30.140276-05:00 localhost kernel: [ 89.201652][ T140] usb
3-6: USB disconnect, device number 4
2024-01-18T21:27:30.140328-05:00 localhost kernel: [ 89.201704][ T140] usb
3-6.3: USB disconnect, device number 6
2024-01-18T21:27:30.172201-05:00 localhost kernel: [ 89.233833][ T100] usb
2-2: USB disconnect, device number 2
2024-01-18T21:27:30.184156-05:00 localhost kernel: [ 89.248431][ T140] usb
3-6.4: USB disconnect, device number 7
2024-01-18T21:27:30.400050-05:00 localhost kernel: [ 89.463677][ T140] usb
3-6.5: USB disconnect, device number 8
2024-01-18T21:27:34.152426-05:00 localhost kernel: [ 93.214103][ C0] BUG:
workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 81s!
2024-01-18T21:27:34.152464-05:00 localhost kernel: [ 93.214171][ C0]
Showing busy workqueues and worker pools:
2024-01-18T21:27:34.152467-05:00 localhost kernel: [ 93.214185][ C0]
workqueue events: flags=0x0
2024-01-18T21:27:34.152468-05:00 localhost kernel: [ 93.214202][ C0] pwq
2: cpus=1 node=0 flags=0x0 nice=0 active=13/256 refcnt=15
2024-01-18T21:27:34.152470-05:00 localhost kernel: [ 93.214220][ C0]
pending: free_work, intel_atomic_helper_free_state_worker [i915],
kfree_rcu_monitor, kernfs_notify_workfn, iwl_mvm_tcm_work [iwlmvm],
once_deferred, once_deferred, delayed_fput, cgroup_bpf_release,
iwl_mvm_async_handlers_wk [iwlmvm], __intel_wakeref_put_work [i915],
free_user_ns, drm_mode_rmfb_work_fn [drm] BAR(1711)
2024-01-18T21:27:34.152477-05:00 localhost kernel: [ 93.215084][ C0] pwq
0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 refcnt=2
2024-01-18T21:27:34.152478-05:00 localhost kernel: [ 93.215095][ C0]
in-flight: 7:ucsi_handle_connector_change [typec_ucsi]
2024-01-18T21:27:34.152480-05:00 localhost kernel: [ 93.215116][ C0]
workqueue events_unbound: flags=0x2
2024-01-18T21:27:34.152481-05:00 localhost kernel: [ 93.215169][ C0] pwq
24: cpus=0-11 flags=0x4 nice=0 active=6/512 refcnt=16
2024-01-18T21:27:34.152483-05:00 localhost kernel: [ 93.215179][ C0]
in-flight: 93:fsnotify_connector_destroy_workfn
fsnotify_connector_destroy_workfn, 90:fsnotify_mark_destroy_workfn
fsnotify_mark_destroy_workfn BAR(3780) BAR(1) BAR(3346) BAR(2944) BAR(3034)
BAR(3072) BAR(2139) BAR(2822), 1134:pxp_session_work [i915] pxp_session_work
[i915]