Additional system freeze on October 24, 2026

Another complete system freeze occurred at approximately 20:04 CEST,
again running Ubuntu 24.04 LTS with kernel 6.8.0-147-generic.

EFI PStore recovered two kernel Oops records from the affected boot.

Both Oops records show a kernel NULL pointer dereference at address
0x45, with the identical instruction pointer:

RIP: free_unref_page_list+0x2ed/0x420

The first Oops occurred on CPU 6 during page-fault handling and memory
management (wp_page_copy, folio_add_lru). The second occurred on CPU 3
during memory release (exit_mmap, free_pages_and_swap_cache).

The kernel journal additionally reports multiple BUG: Bad page state
messages and subsequent soft lockups involving sh and kcompactd0.

Several user-space segmentation faults (stat, cut, gedit) were also
recorded earlier during the same boot.

Unlike the October 18 crash in update_blocked_averages(), this incident
occurred in the memory-management subsystem. A common underlying cause
has not yet been established.

Both recovered EFI PStore dumps are attached for investigation.

** Attachment added: "kernel-oops-20261024.zip"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2171338/+attachment/6012208/+files/kernel-oops-20261024.zip

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https://bugs.launchpad.net/bugs/2171338

Title:
  Kernel panic in update_blocked_averages() on Ubuntu 24.04, linux
  6.8.0-147-generic

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