1. Rule out hardware RAM fault: Ask reporter to run memtest86+ overnight (at
least 2 passes). The corruption pattern (random function pointer overwrite +
list corruption) is consistent with faulty RAM — especially on a laptop without
ECC.
2. If memtest passes (RAM is clean): This is likely a kernel use-after-free or
DMA corruption bug. Recommend:
- Boot with slub_debug=FZPU to enable SLUB poisoning/red-zoning (catches
use-after-free)
- Check if i915 or xe GPU driver is doing unchecked DMA that could corrupt
kernel memory
- Test with i915.enable_guc=0 to disable GuC firmware (reduces DMA complexity)
3. Check if persists on stock Noble kernel (6.8): Ask reporter to test
linux-image-6.8.0-*-generic to narrow if this is a
6.17-specific regression.
4. iwlwifi is NOT the issue — the disable_11ax=1 workaround the reporter tried
is irrelevant. The WiFi NMI is a secondary effect of the kernel being already
dead. No iwlwifi debugging needed.
5. Collect kdump: Reporter already has crashkernel= configured. Ask them to
install linux-crashdump and verify kdump-config show reports ready. Next crash
will produce a vmcore for deep analysis.
** Changed in: linux-hwe-6.17 (Ubuntu)
Status: New => Incomplete
** Changed in: linux-hwe-6.17 (Ubuntu)
Importance: Undecided => High
** Changed in: linux-hwe-6.17 (Ubuntu)
Assignee: (unassigned) => Stefan Bader (smb)
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https://bugs.launchpad.net/bugs/2153114
Title:
Kernel page faults and iwlwifi NMI crashes causing system freeze on HP
ZBook Firefly 14 G11
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