I no longer am using the motherboard, CPU and RAM that this happened on.
I am using 4.15.0-13-generic on 18.04 now.
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Title:
NULL pointer
** Tags added: kernel-bug
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Title:
NULL pointer dereference during writeback
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** Description changed:
+ This could be part of CVE-2016-3070
+
Happened during dd of 40GB LV:
$ sudo dd if=/dev/vg0/gentoo of=/dev/vg1/gentoo
I also used SIGUSR1 on the dd to monitor it occasionally. There was
other activity at the time as well.
It appears that an attempt
It happened again.
$ uname -r
4.14.9-041409-generic
Dec 29 14:32:14 lakshmi kernel: BUG: unable to handle kernel NULL pointer
dereference at (null)
Dec 29 14:32:14 lakshmi kernel: IP: locked_inode_to_wb_and_lock_list+0x20/0x110
Dec 29 14:32:14 lakshmi kernel: PGD 0 P4D 0
Dec 29
It's likely that this was either fixed upstream or the root cause is
from a patch that was put on the 4.13 kernels that the 4.14 kernels
don't have.
Nov 05 22:15:30 lakshmi kernel: Linux version 4.13.0-16-generic
(buildd@lcy01-02) (gcc version 7.2.0 (Ubuntu 7.2.0-8ubuntu2)) #19-Ubuntu SMP
Wed
Installation of 4.14.2
https://gist.github.com/mettacrawler/7d60c8f51a19b506ea1cb575c2ed4032
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Title:
NULL pointer dereference during writeback
I was unable to reproduce this on 4.13 until Nov 23 when it happened
again.
This time the logs show that I was handling PDF files via Nautilus which
doesn't imply as much disk I/O as the previous 40G dd did.
A quote from:
https://patchwork.kernel.org/patch/9614361/
{{ I am able to reproduce the
Eventually I'll have time to test the upstream kernel.
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Title:
NULL pointer dereference during writeback
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I'd love to have time to work on this kernel bug but I have fires all
over the place with 17.10.
I have a dual-boot setup between 16.04 and 17.10. The 17.10 took over
nine minutes to boot originally. After finding out about
Debian_bug_867368 I got it to boot in over three minutes. It still gets
It doesn't appear the patch mentioned ever landed in mainline.
To see if this was fixed another way, would it be possible for you to
test the latest upstream kernel? Refer to
https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.14 kernel[0].
If this bug is fixed in the
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