Public bug reported:
Problem Description
After upgrading to kernel Ubuntu 5.15.0-160.170-generic 5.15.189, the
system occasionally becomes unresponsive, showing repeated soft lockup
messages in the console/logs. The affected process appears to be
kauditd.
The system requires a hard reboot to recover. The issue does not occur
on kernel 5.15.0-156-generic.
Observed Logs
Example repeated messages (see attached screenshot):
watchdog: BUG: soft lockup - CPU#3 stuck for 4441s! [kauditd:3]
watchdog: BUG: soft lockup - CPU#3 stuck for 4467s! [kauditd:3]
watchdog: BUG: soft lockup - CPU#3 stuck for 4493s! [kauditd:3]
watchdog: BUG: soft lockup - CPU#3 stuck for 4519s! [kauditd:3]
watchdog: BUG: soft lockup - CPU#3 stuck for 4545s! [kauditd:3]
watchdog: BUG: soft lockup - CPU#3 stuck for 4571s! [kauditd:3]
| Key | Value |
| --------------------------- | -------------------------- |
| **OS** | Ubuntu 22.04.5 LTS (Jammy) |
| **Kernel** | 5.15.0-160-generic |
| **Previous Working Kernel** | 5.15.0-156-generic |
| **Environment** | Cloud (VM instance) |
| **Recovery** | Requires reboot |
Actual Behavior:- System becomes unresponsive; repeated soft lockup messages
appear; only recovery via reboot.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2130317
Title:
Soft lockup: CPU stuck in kauditd process on Ubuntu 22.04.5 LTS
(kernel 5.15.0-160-generic)
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