6.8.0-44-generic for noble was released to -updates this morning.
** Changed in: linux (Ubuntu Noble)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/2080039
Title:
Kernel BUG: Bad page state in process kswapd0
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Noble:
Fix Released
Bug description:
Since installing 24.04 two months ago, I've experienced a few random
full-system freezes that required a hard-reset to recover. Up until
now, I was not able to find the cause - plugging in a monitor to the
system would just display nothing, and the journal logs would just
stop abruptly.
My first instinct was bad memory, so after it happened last week I ran
memtest for several hours, but it did not find any memory errors.
However I now believe I have found the actual cause, because it just
happened again and luckily this time the journal saved the start of a
kernel BUG message:
BUG: Bad page state in process kswapd0 pfn:3f053e
page:000000000f35bcf8 refcount:0 mapcount:0 mapping:000000000e24c844
index:0x2bcbd pfn:0x3f053e
aops:btree_aops [btrfs] ino:1
flags: 0x17ffffc0000008(uptodate|node=0|zone=2|lastcpupid=0x1fffff)
page_type: 0xffffffff()
After some digging, I found this kernel bug report:
https://lore.kernel.org/lkml/CABXGCsPktcHQOvKTbPaTwegMExije=Gpgci5NW=hqoro-s7...@mail.gmail.com/
that appears to describe the exact same bug (I am also using btrfs as
the root partition, and my swap file is also on that btrfs
filesystem).
Then I also found this kernel patch:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f3a5367c679d31473d3fbb391675055b4792c309
that appears to be a fix for the above bug.
To try to check if this fix is present in my kernel (no idea if this
is valid), I installed the linux-source package, extracted the archive
in /usr/src/linux-source-6.8.0, and checked the file modified by the
patch mentioned above - and the changes do not appear to have been
made.
So if the patch has not been applied, could this please be done? If it
has actually been applied, then this is some other bug and I need to
do more investigation...
For the time being I have disabled swap to hopefully try and avoid the
crash.
# uname -a
Linux server 6.8.0-41-generic #41-Ubuntu SMP PREEMPT_DYNAMIC Fri Aug 2
20:41:06 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
# cat /proc/version_signature
Ubuntu 6.8.0-41.41-generic 6.8.12
# lsb_release -rd
No LSB modules are available.
Description: Ubuntu 24.04.1 LTS
Release: 24.04
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