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[Launchpad Bug Tracker <1835322@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package linux-azure - 4.18.0-1025.27~18.04.1

---------------
linux-azure (4.18.0-1025.27~18.04.1) bionic; urgency=medium

  * linux-azure: 4.18.0-1025.27~18.04.1 -proposed tracker (LP: #1835436)

  [ Ubuntu: 4.18.0-1025.27 ]

  * linux-azure: 4.18.0-1025.27 -proposed tracker (LP: #1835438)
  * [linux-azure] panic in ext4_resize_fs()  found during storage testing
    (LP: #1835322)
    - ext4: fix crash during online resizing
  * linux: 4.18.0-26.27 -proposed tracker (LP: #1834904)
  * QCA9377 isn't being recognized sometimes (LP: #1757218)
    - SAUCE: USB: Disable USB2 LPM at shutdown
  * hns: fix ICMP6 neighbor solicitation messages discard problem (LP: #1833140)
    - net: hns: fix ICMP6 neighbor solicitation messages discard problem
    - net: hns: fix unsigned comparison to less than zero
  * Fix occasional boot time crash in hns driver (LP: #1833138)
    - net: hns: Fix probabilistic memory overwrite when HNS driver initialized
  *  use-after-free in hns_nic_net_xmit_hw (LP: #1833136)
    - net: hns: fix KASAN: use-after-free in hns_nic_net_xmit_hw()
  * hns: attempt to restart autoneg when disabled should report error
    (LP: #1833147)
    - net: hns: Restart autoneg need return failed when autoneg off
  * [UBUNTU] pkey: Indicate old mkvp only if old and curr. mkvp are different
    (LP: #1832625)
    - pkey: Indicate old mkvp only if old and current mkvp are different
  * [UBUNTU] kernel: Fix gcm-aes-s390 wrong scatter-gather list processing
    (LP: #1832623)
    - s390/crypto: fix gcm-aes-s390 selftest failures
  * rtlwifi: aggressive memory leak (LP: #1831751)
    - rtlwifi: Fix leak of skb when processing C2H_BT_INFO
  * Kernel modules generated incorrectly when system is localized to a non-
    English language (LP: #1828084)
    - scripts: override locale from environment when running recordmcount.pl
  * CVE-2019-11815
    - net: rds: force to destroy connection if t_sock is NULL in
      rds_tcp_kill_sock().
  * Sound device not detected after resume from hibernate (LP: #1826868)
    - drm/i915: Force 2*96 MHz cdclk on glk/cnl when audio power is enabled
    - drm/i915: Save the old CDCLK atomic state
    - drm/i915: Remove redundant store of logical CDCLK state
    - drm/i915: Skip modeset for cdclk changes if possible
  * Handle overflow in proc_get_long of sysctl (LP: #1833935)
    - sysctl: handle overflow in proc_get_long
  * Dell XPS 13 (9370) defaults to s2idle sleep/suspend instead of deep, NVMe
    drains lots of power under s2idle (LP: #1808957)
    - Revert "UBUNTU: SAUCE: pci/nvme: prevent WDC PC SN720 NVMe from entering D3
      and being disabled"
    - Revert "UBUNTU: SAUCE: nvme: add quirk to not call disable function when
      suspending"
    - Revert "UBUNTU: SAUCE: pci: prevent Intel NVMe SSDPEKKF from entering D3"
    - Revert "SAUCE: nvme: add quirk to not call disable function when suspending"
    - Revert "SAUCE: pci: prevent sk hynix nvme from entering D3"
    - PCI: PM: Avoid possible suspend-to-idle issue
    - PCI: PM: Skip devices in D0 for suspend-to-idle
    - nvme-pci: Sync queues on reset
    - nvme: Export get and set features
    - nvme-pci: Use host managed power state for suspend
  * hinic: fix oops due to race in set_rx_mode (LP: #1832048)
    - hinic: fix a bug in set rx mode
  * ubuntu 18.04 flickering screen with Radeon X1600 (LP: #1791312)
    - drm/radeon: prefer lower reference dividers
  * [linux-azure] Block Layer Commits Requested in Azure Kernels (LP: #1834499)
    - block: Clear kernel memory before copying to user
    - block/bio: Do not zero user pages
  * CONFIG_LOG_BUF_SHIFT set to 14 is too low on arm64 (LP: #1824864)
    - [Config] CONFIG_LOG_BUF_SHIFT=18 on all 64bit arches
  * Handle overflow for file-max (LP: #1834310)
    - sysctl: handle overflow for file-max
    - kernel/sysctl.c: fix out-of-bounds access when setting file-max
  * [ALSA] [PATCH] Headset fixup for System76 Gazelle (gaze14) (LP: #1827555)
    - ALSA: hda/realtek - Headset fixup for System76 Gazelle (gaze14)
    - ALSA: hda/realtek - Corrected fixup for System76 Gazelle (gaze14)
  * crashdump fails on HiSilicon D06 (LP: #1828868)
    - iommu/arm-smmu-v3: Don't disable SMMU in kdump kernel
  * CVE-2019-11833
    - ext4: zero out the unused memory region in the extent tree block
  * does not detect headphone when there is no other output devices
    (LP: #1831065)
    - ALSA: hda/realtek - Fixed hp_pin no value
    - ALSA: hda/realtek - Use a common helper for hp pin reference
  * Support new ums-realtek device (LP: #1831840)
    - USB: usb-storage: Add new ID to ums-realtek
  * amd_iommu possible data corruption (LP: #1823037)
    - iommu/amd: Reserve exclusion range in iova-domain
    - iommu/amd: Set exclusion range correctly
  * Add new sound card PCIID into the alsa driver (LP: #1832299)
    - ALSA: hda/intel: add CometLake PCI IDs
  * sky2 ethernet card doesn't work after returning from suspend
    (LP: #1807259) // sky2 ethernet card link not up after suspend
    (LP: #1809843)
    - sky2: Disable MSI on Dell Inspiron 1545 and Gateway P-79
  * idle-page oopses when accessing page frames that are out of range
    (LP: #1833410)
    - mm/page_idle.c: fix oops because end_pfn is larger than max_pfn
  * Add pointstick support on HP ZBook 17 G5 (LP: #1833387)
    - Revert "HID: multitouch: Support ALPS PTP stick with pid 0x120A"
    - SAUCE: HID: multitouch: Add pointstick support for ALPS Touchpad
  * [SRU][B/B-OEM/B-OEM-OSP-1/C/D/E] Add trackpoint middle button support of 2
    new thinpads (LP: #1833637)
    - Input: elantech - enable middle button support on 2 ThinkPads
  * CVE-2019-11884
    - Bluetooth: hidp: fix buffer overflow
  * af_alg06 test from crypto test suite in LTP failed with kernel oops on B/C
    (LP: #1829725)
    - crypto: authenc - fix parsing key with misaligned rta_len
  * Address performance issue w/ GICv4-based guests (LP: #1829942)
    - arm64: KVM: Always set ICH_HCR_EL2.EN if GICv4 is enabled
  * CVE-2018-12126 // CVE-2018-12127 // CVE-2018-12130 // CVE-2019-11091
    - SAUCE: Synchronize MDS mitigations with upstream
    - Documentation: Correct the possible MDS sysfs values
    - x86/speculation/mds: Fix documentation typo
  * CVE-2019-11091
    - x86/mds: Add MDSUM variant to the MDS documentation
  * CVE-2019-11085
    - drm/i915/gvt: Fix mmap range check
  * alignment test in powerpc from ubuntu_kernel_selftests failed on B/C Power9
    (LP: #1813118)
    - selftests/powerpc: Remove Power9 copy_unaligned test
  * TRACE_syscall.ptrace_syscall_dropped in seccomp from ubuntu_kernel_selftests
    failed on B/C PowerPC (LP: #1812796)
    - selftests/seccomp: Enhance per-arch ptrace syscall skip tests
  * Eletrical noise occurred when external headset enter powersaving mode on a
    DEll machine (LP: #1828798)
    - ALSA: hda/realtek - Reduce click noise on Dell Precision 5820 headphone
    - ALSA: hda/realtek - Fixup headphone noise via runtime suspend
  * [18.04/18.10] File libperf-jvmti.so is missing in linux-tools-common deb on
    Ubuntu (LP: #1761379)
    - [Packaging] Support building libperf-jvmti.so
  * TCP : race condition on socket ownership in tcp_close() (LP: #1830813)
    - tcp: do not release socket ownership in tcp_close()
  * ethtool identify command doesn't blink LED on Hi1620 NICs (LP: #1829306)
    - net: phy: marvell: add new default led configure for m88e151x
  * Add support to Comet Lake LPSS (LP: #1830175)
    - mfd: intel-lpss: Add Intel Comet Lake PCI IDs
  * Reduce NAPI weight in hns driver from 256 to 64 (LP: #1830587)
    - net: hns: Use NAPI_POLL_WEIGHT for hns driver

 -- Marcelo Henrique Cerri <marcelo.cerri@xxxxxxxxxxxxx>  Thu, 04 Jul
2019 17:12:00 -0300

** Changed in: linux-azure (Ubuntu)
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/1835322

Title:
  [linux-azure] panic in ext4_resize_fs()  found during storage testing

Status in linux-azure package in Ubuntu:
  Fix Released
Status in linux-azure source package in Xenial:
  Fix Released
Status in linux-azure source package in Cosmic:
  Fix Committed

Bug description:
  A panic was observed during file system testing.  The trace is the
  following:

  [ 8783.243586] kernel BUG at /build/linux-azure-3iFJ9j/linux-azure-4.18.0/fs/ext4/resize.c:266!
  [ 8783.252751] invalid opcode: 0000 [#1] SMP PTI
  [ 8783.256735] CPU: 7 PID: 39476 Comm: resize2fs Not tainted 4.18.0-1023-azure #24~18.04.1-Ubuntu
  [ 8783.256735] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS 090007  06/02/2017
  [ 8783.256735] RIP: 0010:ext4_resize_fs+0x73b/0xf10
  [ 8783.256735] Code: 50 ff ff ff 41 8b 75 10 4d 8b 65 00 85 f6 0f 94 c0 4d 85 e4 0f 94 c1 09 c8 83 bd 5c ff ff ff 01 7e 48 84 c0 0f 84 43 06 00 00 <0f> 0b 48 c7 c2 68 a7 8d 8f 48 c7 c6 00 fb 88 8f 4c 89 f7 e8 0d f8
  [ 8783.256735] RSP: 0018:ffff984e8dce7cb0 EFLAGS: 00010202
  [ 8783.256735] RAX: 0000000000205c01 RBX: 000000000000001f RCX: 0000000000000000
  [ 8783.256735] RDX: ffff8b1dbe1367d0 RSI: 0000000000000000 RDI: 0000000000000000
  [ 8783.256735] RBP: ffff984e8dce7d88 R08: ffff984e8dce7d4c R09: ffff984e8dce7d54
  [ 8783.256735] R10: 0000000000000120 R11: 0000000000000001 R12: ffff8b1dbe136800
  [ 8783.256735] R13: ffff8b1d74aefe80 R14: ffff8b1dbdeb9000 R15: 0000000000000000
  [ 8783.256735] FS:  00007f213fed30c0(0000) GS:ffff8b1ded7c0000(0000) knlGS:0000000000000000
  [ 8783.256735] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [ 8783.256735] CR2: 0000556aa08ae9b8 CR3: 0000001b8e324005 CR4: 00000000003606e0
  [ 8783.256735] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  [ 8783.256735] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
  [ 8783.256735] Call Trace:
  [ 8783.256735]  ? security_capable+0x3c/0x60
  [ 8783.256735]  ext4_ioctl+0xf91/0x14d0
  [ 8783.256735]  ? audit_filter_rules.constprop.14+0x325/0xf90
  [ 8783.256735]  ? audit_filter_rules.constprop.14+0x24b/0xf90
  [ 8783.256735]  do_vfs_ioctl+0xa8/0x630
  [ 8783.256735]  ksys_ioctl+0x75/0x80
  [ 8783.256735]  __x64_sys_ioctl+0x1a/0x20
  [ 8783.256735]  do_syscall_64+0x6a/0x1a0
  [ 8783.256735]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
  [ 8783.256735] RIP: 0033:0x7f213f3825d7
  [ 8783.256735] Code: b3 66 90 48 8b 05 b1 48 2d 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 81 48 2d 00 f7 d8 64 89 01 48
  [ 8783.256735] RSP: 002b:00007ffe8effd688 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
  [ 8783.256735] RAX: ffffffffffffffda RBX: 0000556aa08aa980 RCX: 00007f213f3825d7
  [ 8783.256735] RDX: 00007ffe8effd7d0 RSI: 0000000040086610 RDI: 0000000000000004
  [ 8783.256735] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
  [ 8783.256735] R10: 0000000000000000 R11: 0000000000000246 R12: 0000556aa08ac980
  [ 8783.256735] R13: 00007ffe8effd7d0 R14: 0000556aa08a92d0 R15: 0000000000000000

  
  This issue is resolved by the following upstream commit:
  f96c3ac8dfc2 ("ext4: fix crash during online resizing")

  
  Commit f96c3ac8dfc2 is in mainline as of v5.1-rc1.  This commit was requested in the upstream stable kernels.  However, the Ubuntu kernels are EOL upstream.  Please include this commit in the 16.04 and 18.04 linux-azure kernels.

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