This bug was fixed in the package linux - 4.15.0-51.55
---------------
linux (4.15.0-51.55) bionic; urgency=medium
* linux: 4.15.0-51.55 -proposed tracker (LP: #1829219)
* disable a.out support (LP: #1818552)
- [Config] Disable a.out support
* [UBUNTU] qdio: clear intparm during shutdown (LP: #1828394)
- s390/qdio: clear intparm during shutdown
* ftrace in ubuntu_kernel_selftests hang with Cosmic kernel (LP: #1826385)
- kprobes/x86: Fix instruction patching corruption when copying more than
one
RIP-relative instruction
* touchpad not working on lenovo yoga 530 (LP: #1787775)
- Revert "UBUNTU: SAUCE: i2c:amd Depends on ACPI"
- Revert "UBUNTU: SAUCE: i2c:amd move out pointer in union i2c_event_base"
- Revert "UBUNTU: SAUCE: i2c:amd I2C Driver based on PCI Interface for
upcoming platform"
- i2c: add helpers to ease DMA handling
- i2c: add a message flag for DMA safe buffers
- i2c: add extra check to safe DMA buffer helper
- i2c: Add drivers for the AMD PCIe MP2 I2C controller
- [Config] Update config for AMD MP2 I2C driver
- [Config] Update I2C_AMD_MP2 annotations
* tm-unavailable in powerpc/tm failed on Bionic Power9 (LP: #1813129)
- selftests/powerpc: Check for pthread errors in tm-unavailable
- selftests/powerpc: Skip tm-unavailable if TM is not enabled
* cp_abort in powerpc/context_switch from ubunut_kernel_selftests failed on
Bionic P9 (LP: #1813134)
- selftests/powerpc: Remove redundant cp_abort test
* bionic/linux: completely remove snapdragon files from sources (LP: #1827880)
- [Packaging] remove snapdragon dead files
- [Config] update configs after snapdragon removal
* The noise keeps occurring when Headset is plugged in on a Dell machine
(LP: #1827972)
- ALSA: hda/realtek - Fixed Dell AIO speaker noise
* Geneve tunnels don't work when ipv6 is disabled (LP: #1794232)
- geneve: correctly handle ipv6.disable module parameter
* There are 4 HDMI/Displayport audio output listed in sound setting without
attach any HDMI/DP monitor (LP: #1827967)
- ALSA: hda/hdmi - Read the pin sense from register when repolling
- ALSA: hda/hdmi - Consider eld_valid when reporting jack event
* Headphone jack switch sense is inverted: plugging in headphones disables
headphone output (LP: #1824259)
- ASoC: rt5645: Headphone Jack sense inverts on the LattePanda board
* CTAUTO:DevOps:860.50:devops4fp1:Error occurred during LINUX Dmesg error
Checking for all LINUX clients for devops4p10 (LP: #1766201)
- SAUCE: integrity: downgrade error to warning
* Screen freeze after resume from S3 when HDMI monitor plugged on Dell
Precision 7740 (LP: #1825958)
- PCI: Restore resized BAR state on resume
* potential memory corruption on arm64 on dev release (LP: #1827437)
- driver core: Postpone DMA tear-down until after devres release
* powerpc/pmu/ebb test in ubuntu_kernel_selftest failed with "error while
loading shared libraries" on Bionic/Cosmic PowerPC (LP: #1812805)
- selftests/powerpc/pmu: Link ebb tests with -no-pie
* unnecessary request_queue freeze (LP: #1815733)
- block: avoid setting nr_requests to current value
- block: avoid setting none scheduler if it's already none
* Kprobe event string type argument failed in ftrace from
ubuntu_kernel_selftests on B/C i386 (LP: #1825780)
- selftests/ftrace: Fix kprobe string testcase to not probe notrace function
* hns: fix socket accounting (LP: #1826911)
- net: hns: fix skb->truesize underestimation
* False positive test result in run_netsocktests from net in
ubuntu_kernel_selftest (LP: #1825777)
- selftests/net: correct the return value for run_netsocktests
-- Kleber Sacilotto de Souza <[email protected]> Wed, 15 May
2019 14:48:35 +0200
** Changed in: linux (Ubuntu Bionic)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1828394
Title:
[UBUNTU] qdio: clear intparm during shutdown
Status in Ubuntu on IBM z Systems:
Fix Committed
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Bionic:
Fix Released
Bug description:
SRU Justification:
[Impact]
* Crash in qeth_irq() with "Unable to handle kernel pointer
dereference in virtual kernel address space"
[Fix]
* 89286320a236d245834075fa13adb0bdd827ecaa 8928632 "s390/qdio: clear
intparm during shutdown"
[Test Case]
* Offline an OSA CHPID with multiple active qeth interfaces.
[Regression Potential]
* The regression potential can be considered as very low since it only
affects the s390x platform
* and there it only affects the (ccW) qeth (OSA) network devices
* and again this happens if the CHPID is offlined, which usually
doesn't happen during regular operation.
[Other Info]
* The patch was upstream accepted with kernel 4.17, hence it's already
part of cosmic, disco and eoan and proven there to work.
* It needs to be applied to kernel 4.15 to land in 18.04 GA and 16.04.5 HWE.
_________________________
Description: qdio: clear intparm during shutdown
Symptom: Crash in qeth_irq() with "Unable to handle kernel pointer
dereference in virtual kernel address space".
Problem: During shutdown, qdio returns its ccw device back to control
by qeth - but doesn't reset the interrupt parameter on the
device. If qdio_shutdown() failed to terminate its
long-running IO on the ccw_device, qeth will subsequently
do so. In this case the IRQ for the IO completion is
presented to qeth_irq() with the _old_ interrupt parameter,
which gets mis-interpreted as a valid qeth_cmd_buffer
pointer. Dereferencing this bogus pointer in
qeth_release_buffer() triggers the crash.
Solution: When returning the ccw device in qdio_shutdown(), also reset
its interrupt parameter.
Reproduction: Offline an OSA CHPID with multiple active qeth interfaces.
Component: Kernel
Upstream-ID: 89286320a236d245834075fa13adb0bdd827ecaa
Reported: Ubuntu 18.04
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