[Bug 2086818] Re: Null pointer dereference in wireguard module during shutdown

** Description changed:

The bug is intermittent and happens during shutdown process, prevents computer from shutting down.
May be reproducible more often on certain hardware and certain kernel versions.
+
+ Pre-condition: main network connection should be enabled for all users
+ of the computer, even if there's just one.

Reproduction steps:
1) start a wireguard connection,
2) proceed with shutting down the computer,
3) observe parts of the memory traces on the screen,
4) shutdown process is interrupted.

Expected behavior:
Normal shutdown without errors and interruptions.

See also attached dmesg.txt file containing the kernel log.

$ uname -a
Linux elnath 6.11.0-9-generic #9-Ubuntu SMP PREEMPT_DYNAMIC Mon Oct 14 13:19:59 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

$ lsb_release -cr
Release: 24.10
Codename: oracular

Previous release 24.04LTS Noble is also affected. In fact the issue can
be observed even more often.

** Description changed:

The bug is intermittent and happens during shutdown process, prevents computer from shutting down.
May be reproducible more often on certain hardware and certain kernel versions.

- Pre-condition: main network connection should be enabled for all users
- of the computer, even if there's just one.
+ Pre-condition:
+ main network connection should be enabled for all users of the computer, even if there's just one.

Reproduction steps:
1) start a wireguard connection,
2) proceed with shutting down the computer,
3) observe parts of the memory traces on the screen,
4) shutdown process is interrupted.

Expected behavior:
Normal shutdown without errors and interruptions.

See also attached dmesg.txt file containing the kernel log.

$ uname -a
Linux elnath 6.11.0-9-generic #9-Ubuntu SMP PREEMPT_DYNAMIC Mon Oct 14 13:19:59 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

$ lsb_release -cr
Release: 24.10
Codename: oracular

Previous release 24.04LTS Noble is also affected. In fact the issue can
be observed even more often.

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https://bugs.launchpad.net/bugs/2086818

Title:
Null pointer dereference in wireguard module during shutdown

Status in linux package in Ubuntu:
New

Bug description:
The bug is intermittent and happens during shutdown process, prevents computer from shutting down.
May be reproducible more often on certain hardware and certain kernel versions.

Pre-condition:
main network connection should be enabled for all users of the computer, even if there's just one.

Reproduction steps:
1) start a wireguard connection,
2) proceed with shutting down the computer,
3) observe parts of the memory traces on the screen,
4) shutdown process is interrupted.

Expected behavior:
Normal shutdown without errors and interruptions.

See also attached dmesg.txt file containing the kernel log.

$ uname -a
Linux elnath 6.11.0-9-generic #9-Ubuntu SMP PREEMPT_DYNAMIC Mon Oct 14 13:19:59 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

$ lsb_release -cr
Release: 24.10
Codename: oracular

Previous release 24.04LTS Noble is also affected. In fact the issue
can be observed even more often.

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