This bug was fixed in the package linux - 4.15.0-147.151
---------------
linux (4.15.0-147.151) bionic; urgency=medium
* CVE-2021-3444
- bpf: Fix truncation handling for mod32 dst reg wrt zero
* CVE-2021-3600
- SAUCE: bpf: Do not use ax register in interpreter on div/mod
- bpf: fix subprog verifier bypass by div/mod by 0 exception
- SAUCE: bpf: Fix 32-bit register truncation on div/mod instruction
linux (4.15.0-146.150) bionic; urgency=medium
* UAF on CAN BCM bcm_rx_handler (LP: #1931855)
- SAUCE: can: bcm: delay release of struct bcm_op after synchronize_rcu
linux (4.15.0-145.149) bionic; urgency=medium
* bionic/linux: 4.15.0-145.149 -proposed tracker (LP: #1929967)
* Packaging resync (LP: #1786013)
- update dkms package versions
* raid10: Block discard is very slow, causing severe delays for mkfs and
fstrim operations (LP: #1896578)
- md: add md_submit_discard_bio() for submitting discard bio
- md/raid10: extend r10bio devs to raid disks
- md/raid10: pull the code that wait for blocked dev into one function
- md/raid10: improve raid10 discard request
- md/raid10: improve discard request for far layout
* CVE-2021-23133
- sctp: delay auto_asconf init until binding the first addr
* Bionic update: upstream stable patchset 2021-05-25 (LP: #1929603)
- Input: nspire-keypad - enable interrupts only when opened
- dmaengine: dw: Make it dependent to HAS_IOMEM
- ARM: dts: Fix moving mmc devices with aliases for omap4 & 5
- arc: kernel: Return -EFAULT if copy_to_user() fails
- neighbour: Disregard DEAD dst in neigh_update
- ARM: keystone: fix integer overflow warning
- ASoC: fsl_esai: Fix TDM slot setup for I2S mode
- scsi: scsi_transport_srp: Don't block target in SRP_PORT_LOST state
- net: ieee802154: stop dump llsec keys for monitors
- net: ieee802154: stop dump llsec devs for monitors
- net: ieee802154: forbid monitor for add llsec dev
- net: ieee802154: stop dump llsec devkeys for monitors
- net: ieee802154: forbid monitor for add llsec devkey
- net: ieee802154: stop dump llsec seclevels for monitors
- net: ieee802154: forbid monitor for add llsec seclevel
- pcnet32: Use pci_resource_len to validate PCI resource
- mac80211: clear sta->fast_rx when STA removed from 4-addr VLAN
- Input: i8042 - fix Pegatron C15B ID entry
- HID: wacom: set EV_KEY and EV_ABS only for non-HID_GENERIC type of devices
- readdir: make sure to verify directory entry for legacy interfaces too
- arm64: fix inline asm in load_unaligned_zeropad()
- arm64: alternatives: Move length validation in alternative_{insn, endif}
- scsi: libsas: Reset num_scatter if libata marks qc as NODATA
- netfilter: conntrack: do not print icmpv6 as unknown via /proc
- netfilter: nft_limit: avoid possible divide error in nft_limit_init
- net: davicom: Fix regulator not turned off on failed probe
- net: sit: Unregister catch-all devices
- i40e: fix the panic when running bpf in xdpdrv mode
- ibmvnic: avoid calling napi_disable() twice
- ibmvnic: remove duplicate napi_schedule call in do_reset function
- ibmvnic: remove duplicate napi_schedule call in open function
- ARM: footbridge: fix PCI interrupt mapping
- ARM: 9071/1: uprobes: Don't hook on thumb instructions
- pinctrl: lewisburg: Update number of pins in community
- HID: wacom: Assign boolean values to a bool variable
- ARM: dts: Fix swapped mmc order for omap3
- net: geneve: check skb is large enough for IPv4/IPv6 header
- s390/entry: save the caller of psw_idle
- xen-netback: Check for hotplug-status existence before watching
- cavium/liquidio: Fix duplicate argument
- ia64: fix discontig.c section mismatches
- ia64: tools: remove duplicate definition of ia64_mf() on ia64
- x86/crash: Fix crash_setup_memmap_entries() out-of-bounds access
- net: hso: fix NULL-deref on disconnect regression
- USB: CDC-ACM: fix poison/unpoison imbalance
- lockdep: Add a missing initialization hint to the "INFO: Trying to
register
non-static key" message
- drm/msm: Fix a5xx/a6xx timestamps
- Input: s6sy761 - fix coordinate read bit shift
- net: ip6_tunnel: Unregister catch-all devices
- ACPI: tables: x86: Reserve memory occupied by ACPI tables
- ACPI: x86: Call acpi_boot_table_init() after acpi_table_upgrade()
- net: usb: ax88179_178a: initialize local variables before use
- iwlwifi: Fix softirq/hardirq disabling in iwl_pcie_enqueue_hcmd()
- mips: Do not include hi and lo in clobber list for R6
- bpf: Fix masking negation logic upon negative dst register
- iwlwifi: Fix softirq/hardirq disabling in iwl_pcie_gen2_enqueue_hcmd()
- ALSA: usb-audio: Add MIDI quirk for Vox ToneLab EX
- USB: Add reset-resume quirk for WD19's Realtek Hub
- platform/x86: thinkpad_acpi: Correct thermal sensor allocation
* r8152 tx status -71 (LP: #1922651) // Bionic update: upstream stable
patchset 2021-05-25 (LP: #1929603)
- USB: Add LPM quirk for Lenovo ThinkPad USB-C Dock Gen2 Ethernet
* seccomp_bpf:syscall_faked from kselftests fail on s390x (LP: #1928522)
- selftests/seccomp: s390 shares the syscall and return value register
* Fix kdump failures (LP: #1927518)
- video: hyperv_fb: Add ratelimit on error message
- Drivers: hv: vmbus: Increase wait time for VMbus unload
- Drivers: hv: vmbus: Initialize unload_event statically
-- Thadeu Lima de Souza Cascardo <casca...@canonical.com> Fri, 18 Jun
2021 13:49:56 -0300
** Changed in: linux (Ubuntu Bionic)
Status: Fix Committed => Fix Released
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2021-3444
** CVE added: https://cve.mitre.org/cgi-bin/cvename.cgi?name=2021-3600
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https://bugs.launchpad.net/bugs/1927518
Title:
Fix kdump failures
Status in linux package in Ubuntu:
Fix Released
Status in linux-azure package in Ubuntu:
Fix Released
Status in linux-azure-4.15 package in Ubuntu:
New
Status in linux source package in Bionic:
Fix Released
Status in linux-azure source package in Bionic:
Invalid
Status in linux-azure-4.15 source package in Bionic:
Fix Released
Status in linux source package in Focal:
Fix Released
Status in linux-azure source package in Focal:
Fix Released
Status in linux-azure-4.15 source package in Focal:
Invalid
Status in linux source package in Groovy:
Fix Released
Status in linux-azure source package in Groovy:
Fix Released
Status in linux-azure-4.15 source package in Groovy:
Invalid
Status in linux source package in Hirsute:
Fix Released
Status in linux-azure source package in Hirsute:
Fix Released
Status in linux-azure-4.15 source package in Hirsute:
Invalid
Bug description:
SRU Justification
[Impact]
Microsoft relayed a customer report of failures when trying to take a
kdump.
These 3 patches fix the issue:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/video/fbdev/hyperv_fb.c?id=aa5b7d11c7cb87c266d705b237368985e7171958
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/hv/channel_mgmt.c?id=77db0ec8b7764cb9b09b78066ebfd47b2c0c1909
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/hv/channel_mgmt.c?id=8c2d5e0640e53c14b6240e9bf1e32a2226e6e6ca
Patch #1 solves a problem where the “Unable to send packet via vmbus”
message is output continuously. But with that problem fixed, the
second problem can occur where the kdump kernel panics due to
receiving an unexpected VMbus UNLOAD complete message.
Patch #2 prevents the UNLOAD complete message from ever occurring in
the kdump kernel. But if the UNLOAD complete message does occur at
some unexpected time, Patch #3 prevents it from causing a panic.
These patches seem worthy of application to all affected master
kernels.
[Test Plan]
Cause a guest kernel to crash and successfully acquire a kdump.
[Where problems could occur]
The extended Hyper-V wait while flushing could cause side effects.
[Other Info]
SF: #00310145
https://canonical.lightning.force.com/lightning/r/Case/5004K000005pZNNQA2/view
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