** Changed in: linux (Ubuntu Disco)
Status: Fix Committed => Won't Fix
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Title:
5.4.0-11 crash on cryptsetup open
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This bug was fixed in the package linux - 4.15.0-96.97
---
linux (4.15.0-96.97) bionic; urgency=medium
* CVE-2020-8834
- KVM: PPC: Book3S HV: Factor fake-suspend handling out of
kvmppc_save/restore_tm
- KVM: PPC: Book3S PR: Move kvmppc_save_tm/kvmppc_restore_tm to sepa
This bug was fixed in the package linux - 4.4.0-177.207
---
linux (4.4.0-177.207) xenial; urgency=medium
* xenial/linux: 4.4.0-177.207 -proposed tracker (LP: #1867243)
* Packaging resync (LP: #1786013)
- [Packaging] resync getabis
- [Packaging] update helper scripts
*
This bug was fixed in the package linux - 5.3.0-46.38
---
linux (5.3.0-46.38) eoan; urgency=medium
* eoan/linux: 5.3.0-43.36 -proposed tracker (LP: #1867301)
* Fix AMD Stoney Ridge screen flickering under 4K resolution (LP: #1864005)
- iommu/amd: Disable IOMMU on Stoney Ridge
@Claudio: Does this bug need to be verified? Would you be able to verify
this bug on any of the -proposed kernels?
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Title:
5.4.0-11 crash on cryp
This bug is awaiting verification that the 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-
eoan' to 'verification-done-eoan'. If the problem still exists, change
the tag 'verification
This bug is awaiting verification that the 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-
bionic' to 'verification-done-bionic'. If the problem still exists,
change the tag 'verifica
This bug is awaiting verification that the 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-
xenial' to 'verification-done-xenial'. If the problem still exists,
change the tag 'verifica
Upstream fixed this in device-mapper with:
Author: Mike Snitzer
dm: fix potential for q->make_request_fn NULL pointer
This is to be included in:
Xenial: Ubuntu-4.4.0-177.207 (committed)
Bionic: Ubuntu-4.15.0-92.93 (committed, not prepared yet)
Eoan: Ubuntu-5.3.0-43.35 (committed)
Focal:
** Tags added: verification-needed-focal
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Title:
5.4.0-11 crash on cryptsetup open
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Upstream submission:
https://lore.kernel.org/lkml/20200123091713.12623-1-stefan.ba...@canonical.com/T/#t
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Title:
5.4.0-11 crash on cryptsetup op
Fix submitted by smb:
https://lists.ubuntu.com/archives/kernel-team/2020-January/107055.html
** Changed in: linux (Ubuntu)
Assignee: Andrea Righi (arighi) => Stéphane Graber (stgraber)
** Changed in: linux (Ubuntu)
Assignee: Stéphane Graber (stgraber) => Stefan Bader (smb)
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** Changed in: linux (Ubuntu)
Status: Incomplete => Triaged
** Changed in: linux (Ubuntu)
Importance: Undecided => High
** Also affects: linux (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Eoan)
Importance: Undecided
Status: New
*
** Description changed:
- An attempt to run cryptsetup open on a newly created LUKS partition on
- Ubuntu Core 20 causes a kernel crash. This happens in 100% of the
- attempts on the snapd Core 20 installation test, but on an image created
- to reproduce this bug it happens only when certain param
With additional data it is basically a bug in either the mount syscall,
the generic_make_request_checks, or dm.c. Basically device-mapper is set
up in two stages, the initial device creation and the table load.
Somehwere around v4.1 things were changed to defer setting the make-
request function of
I was able to reproduce this with the attached snapd which is essentialls
PR#7999 plus the following patch:
"""
diff --git a/cmd/snap/cmd_auto_import.go b/cmd/snap/cmd_auto_import.go
index 7408371e11..f6b8f1d0d0 100644
--- a/cmd/snap/cmd_auto_import.go
+++ b/cmd/snap/cmd_auto_import.go
@@ -38,7 +3
I reproduced it successfully with the following spread commandline using
PR#7999 plus the patch in the previous comment:
$ spread -debug qemu:ubuntu-20.04-64:tests/main/uc20-snap-recovery-
encrypt
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After a first look at the kernel bug trace, it seems that
q->make_request_fn(q, bio) (block/blk-core.c:1064) became NULL.
The reason might be a race with a block device not yet properly
initialized when some I/O requests were submitted (or a block device de-
registered too early while some I/O was
** Description changed:
An attempt to run cryptsetup open on a newly created LUKS partition on
Ubuntu Core 20 causes a kernel crash. This happens in 100% of the
attempts on the snapd Core 20 installation test, but on an image created
to reproduce this bug it happens only when certain param
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Andrea Righi (arighi)
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Title:
5.4.0-11 crash on cryptsetup open
To manage notificat
This model file is used to build both the spread test image and the
manually built image. The two generated images, however, seem to behave
differently regarding the conditions leading to the crash: while it
always happen in the spread test, higher KDF iteration times values
allow the encrypted dev
Snap versions used to build the image:
pc-kernel_374.snap
pc_83.snap
snapd_6113.snap
core20_322.snap
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Title:
5.4.0-11 crash on cryptsetup open
** Attachment added: "Screenshot of the procedure to trigger the crash"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1860231/+attachment/5321426/+files/Screenshot%20from%202020-01-18%2016-16-19.png
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