Patch to nilfs2 by Ryusuke Konishi (https://www.spinics.net/lists/linux-
nilfs/msg04322.html) has found its way to Ubuntu kernel image linux-
image-5.3.0-64-lowlatency (5.3.0-64.58), and the kernel oops doesn't
appear any more. To me it seems this issue is finally resolved.
** Changed in: linux
Brian G also bisected and found another commit
(d3b3c0a14615c495118acc4bdca23d53eea46ed2) to trigger the bug:
https://lkml.org/lkml/2020/2/15/260. There's also a lot of additional
information from ARAI Shun-ichi.
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Bugs,
I currently can't help much in debugging this problem, as I have limited
time, and only one computer, and I'm a bit worried about corrupting the
filesystem in the process. (I've been trying to set up user-mode linux
with nilfs2 root fs, but so far haven't had success in bringing the UML
setup up,
I updated to 5.3.0-28.30-lowlatency from proposed, and the same thing
happened.
Jan 17 21:15:24 lillukka udisksd[987]: failed to load module mdraid:
libbd_mdraid.so.2: cannot open shared object file: No such file or directory
Jan 17 21:15:24 lillukka kernel: [0.00] microcode: microcode
Public bug reported:
With linux-image-5.3.0-26-lowlatency, segctord kthread encounters a
"BUG: kernel NULL pointer dereference, address: 00a8" some
half a minute from boot. Before that, one can log in to the system
(/home is on a nilfs2 filesystem), but after the kernel BUG report,
