This bug was fixed in the package linux - 5.15.0-35.36
---
linux (5.15.0-35.36) jammy; urgency=medium
* CVE-2022-21499
- SAUCE: debug: Lock down kgdb
linux (5.15.0-34.35) jammy; urgency=medium
* jammy/linux: 5.15.0-34.35 -proposed tracker (LP: #1974322)
* AMD APU s2idle
This bug was fixed in the package linux - 5.13.0-46.51
---
linux (5.13.0-46.51) impish; urgency=medium
* CVE-2022-21499
- SAUCE: debug: Lock down kgdb
linux (5.13.0-45.50) impish; urgency=medium
* impish/linux: 5.13.0-45.50 -proposed tracker (LP: #1974347)
*
This bug is awaiting verification that the linux-
hwe-5.15/5.15.0-32.33~20.04.1 kernel in -proposed solves the problem.
Please test the kernel and update this bug with the results. If the
problem is solved, change the tag 'verification-needed-focal' to
'verification-done-focal'. If the problem
This bug is awaiting verification that the linux/5.13.0-42.47 kernel in
-proposed solves the problem. Please test the kernel and update this bug
with the results. If the problem is solved, change the tag
'verification-needed-impish' to 'verification-done-impish'. If the
problem still exists,
Alex, thanks for the review! We can definitely remove the dependency of
AUFS and provide a standalone patch, in this way we can provide this
feature also to those kernels that don't have AUFS enabled (like all the
recent kernels in jammy). I'll work on that and will ping you when I
have a patch
Hi Andrea,
thanks a lot!
1. In my original patch here:
https://patchwork.ozlabs.org/project/ubuntu-kernel/patch/20210426081121.37363-1-alexan...@mihalicyn.com/
there was no "fput" call inside ovl_vm_prfile_set helper. fput was in
the outer ovl_mmap() function in fs/overlayfs/file.c
You last
Everything looks good, so I re-applied the patch with the addition of
this extra fix:
https://git.launchpad.net/~ubuntu-
kernel/ubuntu/+source/linux/+git/focal/commit/?h=hwe-5.15-next=b4c25dba7993400e9c57d3e60bec4ab8bce1b701
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I think I have a proper fix to re-introduce this patch without panicing
the kernel. I'm currently running some stress tests to make sure nothing
is broken. If everything goes well I'll re-introduce this patch with the
proper fix.
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@mihalicyn Yes, this patch without AUFS enabled doesn't introduce any
problem, but that's because without AUFS the patch is basically a no-op.
Here's the ported patch that was applied to 5.15:
Hi Andrea,
Do I understand you correctly, that this patch without AUFS works fine,
but on kernels with AUFS enabled it triggers the issue described above?
Please, feel free to ping me if you need help with reworking that.
Thanks a lot for your attention to this problem!
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This patch seems to introduce this NULL pointer dereference, that can be
triggered systematically running lxc autopkgtest:
BUG: kernel NULL pointer dereference, address: 0008
[ 447.039738] #PF: supervisor read access in kernel mode
[ 447.040369] #PF: error_code(0x) - not-present
NOTE to clarify: I'm going to revert this patch in focal/hwe-5.15, that
is the only 5.15 kernel with this patch that has AUFS enabled (so the
only kernel where this bug can be triggered).
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** Changed in: linux (Ubuntu Impish)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1967924
Title:
re-apply missing overlayfs SAUCE patch
To manage
This bug is awaiting verification that the linux/5.15.0-28.29 kernel in
-proposed solves the problem. Please test the kernel and update this bug
with the results. If the problem is solved, change the tag
'verification-needed-jammy' to 'verification-done-jammy'. If the problem
still exists, change
** Changed in: linux (Ubuntu Impish)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu Impish)
Status: New => In Progress
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https://bugs.launchpad.net/bugs/1967924
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