Ubuntu 23.04 (Lunar Lobster) has reached end of life, so this bug will
not be fixed for that specific release.
** Changed in: linux (Ubuntu Lunar)
Status: New => Won't Fix
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Ubuntu 23.04 (Lunar Lobster) has reached end of life, so this bug will
not be fixed for that specific release.
** Changed in: apparmor (Ubuntu Lunar)
Status: New => Won't Fix
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Thanks JJ, much appreciated :-)
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https://bugs.launchpad.net/bugs/2024599
Title:
linux-image-5.15.0-1032-realtime locks up under scheduler test load
Status in apparmor
This should be fixed by upstream commit
ec6851ae0ab4 apparmor: fix: kzalloc perms tables for shared dfas
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https://bugs.launchpad.net/bugs/2024599
Title:
And also occurs in Ubuntu Mantic with 6.3.0-7-generic
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https://bugs.launchpad.net/bugs/2024599
Title:
linux-image-5.15.0-1032-realtime locks up under scheduler test load
5.15.0.75 works fine, no problem, 5.19.0-45 kernel crashes, so issue
introduced between 5.15 and 5.19
** Also affects: apparmor (Ubuntu Lunar)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Lunar)
Importance: Undecided
Status: New
** Also affects: apparmor
And with 5.19.0-45-generic:
sudo ./stress-ng --apparmor 1 --klog-check
[sudo] password for cking:
stress-ng: info: [1179] defaulting to a 86400 second (1 day, 0.00 secs) run
per stressor
stress-ng: info: [1179] dispatching hogs: 1 apparmor
stress-ng: info: [1180] klog-check: kernel cmdline:
On 6.2.0-21-generic I also get:
sudo ./stress-ng --apparmor 1 --klog-check
stress-ng: error: [1083] klog-check: alert: [66.442338] 'BUG: kernel NULL
pointer dereference, address: 0030'
stress-ng: error: [1083] klog-check: alert: [66.442538] '#PF: supervisor read
access in kernel
0.15.06-2 against 6.2.0-1006-kvm also eats memory, but sometimes adds:
13:06:48.136501 AppArmor DFA next/check upper bounds error
13:06:48.204486 AppArmor DFA next/check upper bounds error
13:06:48.228502 AppArmor DFA next/check upper bounds error
13:06:48.476002 AppArmor DFA state with invalid
I've managed to capture where it hangs, looks like a RCU issue, see
attached screen shot.
** Attachment added: "Screenshot from 2023-06-23 12-28-42.png"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2024599/+attachment/5681654/+files/Screenshot%20from%202023-06-23%2012-28-42.png
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I'm working through the stressors to see which ones are possibly causing
issues. I did notice that the apparmor stressor eats up memory until the
system runs out of memory. This stressor loads illegal apparmor profiles
and then removes them. Perhaps there is a memory leak in the loading of
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