ext2 build failure on 4.4.0-180.210

[Ian May]

[Impact]
Build failure when building ext2

fs/ext2/xattr.c:828:18: error: 'ext2_xattr_cache' undeclared (first use in this function)
     atomic_read(&ext2_xattr_cache->c_entry_count));

[Fix]
The fix is upstream commit 32302085a8d90859c40cf1a5e8313f575d06ec75 "ext2: fix debug reference to ext2_xattr_cache"

[Test case]
Enable CONFIG_EXT2_FS and build kernel

[Regression potential]
Low, fix is changing the contents of a print to a string literal.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1880213

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-snapdragon - 4.4.0-1138.146

---------------
linux-snapdragon (4.4.0-1138.146) xenial; urgency=medium

  * xenial/linux-snapdragon: 4.4.0-1138.146 -proposed tracker (LP: #1878869)

  * ext2 build failure on 4.4.0-180.210 (LP: #1880213)
    - ext2: fix debug reference to ext2_xattr_cache

  [ Ubuntu: 4.4.0-180.210 ]

  * xenial/linux: 4.4.0-180.210 -proposed tracker (LP: #1878873)
  * Xenial update: 4.4.223 upstream stable release (LP: #1878232)
    - mwifiex: fix PCIe register information for 8997 chipset
    - drm/qxl: qxl_release use after free
    - drm/qxl: qxl_release leak in qxl_draw_dirty_fb()
    - staging: rtl8192u: Fix crash due to pointers being "confusing"
    - usb: gadget: f_acm: Fix configfs attr name
    - usb: gadged: pch_udc: get rid of redundant assignments
    - usb: gadget: pch_udc: reorder spin_[un]lock to avoid deadlock
    - usb: gadget: udc: core: don't starve DMA resources
    - MIPS: Fix macro typo
    - MIPS: ptrace: Drop cp0_tcstatus from regoffset_table[]
    - MIPS: BMIPS: Fix PRID_IMP_BMIPS5000 masking for BMIPS5200
    - MIPS: smp-cps: Stop printing EJTAG exceptions to UART
    - MIPS: scall: Handle seccomp filters which redirect syscalls
    - MIPS: BMIPS: BMIPS5000 has I cache filing from D cache
    - MIPS: BMIPS: Clear MIPS_CACHE_ALIASES earlier
    - MIPS: BMIPS: local_r4k___flush_cache_all needs to blast S-cache
    - MIPS: BMIPS: Pretty print BMIPS5200 processor name
    - MIPS: Fix HTW config on XPA kernel without LPA enabled
    - MIPS: BMIPS: Adjust mips-hpt-frequency for BCM7435
    - MIPS: math-emu: Fix BC1{EQ,NE}Z emulation
    - MIPS: Fix BC1{EQ,NE}Z return offset calculation
    - MIPS: perf: Fix I6400 event numbers
    - MIPS: KVM: Fix translation of MFC0 ErrCtl
    - MIPS: SMP: Update cpu_foreign_map on CPU disable
    - MIPS: c-r4k: Fix protected_writeback_scache_line for EVA
    - MIPS: Octeon: Off by one in octeon_irq_gpio_map()
    - bpf, mips: fix off-by-one in ctx offset allocation
    - MIPS: RM7000: Double locking bug in rm7k_tc_disable()
    - MIPS: Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO
    - mips/panic: replace smp_send_stop() with kdump friendly version in panic
      path
    - ARM: dts: armadillo800eva Correct extal1 frequency to 24 MHz
    - ARM: imx: select SRC for i.MX7
    - ARM: dts: kirkwood: gpio pin fixes for linkstation ls-wxl/wsxl
    - ARM: dts: kirkwood: gpio pin fixes for linkstation ls-wvl/vl
    - ARM: dts: kirkwood: gpio-leds fixes for linkstation ls-wxl/wsxl
    - ARM: dts: kirkwood: gpio-leds fixes for linkstation ls-wvl/vl
    - ARM: dts: orion5x: gpio pin fixes for linkstation lswtgl
    - ARM: dts: orion5x: fix the missing mtd flash on linkstation lswtgl
    - ARM: dts: kirkwood: use unique machine name for ds112
    - ARM: dts: kirkwood: add kirkwood-ds112.dtb to Makefile
    - ARM: OMAP2+: hwmod: fix _idle() hwmod state sanity check sequence
    - perf/x86: Fix filter_events() bug with event mappings
    - x86/LDT: Print the real LDT base address
    - x86/apic/uv: Silence a shift wrapping warning
    - ALSA: fm801: explicitly free IRQ line
    - ALSA: fm801: propagate TUNER_ONLY bit when autodetected
    - ALSA: ...

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

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 'verification-needed-xenial' to 'verification-failed-xenial'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.4.0-185.215

---------------
linux (4.4.0-185.215) xenial; urgency=medium

  * Packaging resync (LP: #1786013)
    - [Packaging] update helper scripts

  * CVE-2020-0543
    - UBUNTU/SAUCE: x86/speculation/srbds: do not try to turn mitigation off when
      not supported

  * Xenial update: 4.4.224 upstream stable release (LP: #1881356)
    - USB: serial: qcserial: Add DW5816e support
    - Revert "net: phy: Avoid polling PHY with PHY_IGNORE_INTERRUPTS"
    - dp83640: reverse arguments to list_add_tail
    - net/mlx4_core: Fix use of ENOSPC around mlx4_counter_alloc()
    - sch_sfq: validate silly quantum values
    - sch_choke: avoid potential panic in choke_reset()
    - enic: do not overwrite error code
    - ipv6: fix cleanup ordering for ip6_mr failure
    - binfmt_elf: move brk out of mmap when doing direct loader exec
    - x86/apm: Don't access __preempt_count with zeroed fs
    - Revert "IB/ipoib: Update broadcast object if PKey value was changed in index
      0"
    - USB: uas: add quirk for LaCie 2Big Quadra
    - USB: serial: garmin_gps: add sanity checking for data length
    - batman-adv: fix batadv_nc_random_weight_tq
    - scripts/decodecode: fix trapping instruction formatting
    - phy: micrel: Ensure interrupts are reenabled on resume
    - binfmt_elf: Do not move brk for INTERP-less ET_EXEC
    - ext4: add cond_resched() to ext4_protect_reserved_inode
    - blktrace: Fix potential deadlock between delete & sysfs ops
    - blktrace: fix unlocked access to init/start-stop/teardown
    - blktrace: fix trace mutex deadlock
    - ptp: do not explicitly set drvdata in ptp_clock_register()
    - ptp: use is_visible method to hide unused attributes
    - ptp: create "pins" together with the rest of attributes
    - chardev: add helper function to register char devs with a struct device
    - ptp: Fix pass zero to ERR_PTR() in ptp_clock_register
    - ptp: fix the race between the release of ptp_clock and cdev
    - ptp: free ptp device pin descriptors properly
    - net: handle no dst on skb in icmp6_send
    - net/sonic: Fix a resource leak in an error handling path in
      'jazz_sonic_probe()'
    - net: moxa: Fix a potential double 'free_irq()'
    - drop_monitor: work around gcc-10 stringop-overflow warning
    - scsi: sg: add sg_remove_request in sg_write
    - cifs: Check for timeout on Negotiate stage
    - cifs: Fix a race condition with cifs_echo_request
    - dmaengine: pch_dma.c: Avoid data race between probe and irq handler
    - dmaengine: mmp_tdma: Reset channel error on release
    - drm/qxl: lost qxl_bo_kunmap_atomic_page in qxl_image_init_helper()
    - ipc/util.c: sysvipc_find_ipc() incorrectly updates position index
    - net: openvswitch: fix csum updates for MPLS actions
    - gre: do not keep the GRE header around in collect medata mode
    - mm/memory_hotplug.c: fix overflow in test_pages_in_a_zone()
    - scsi: qla2xxx: Avoid double completion of abort command
    - i40e: avoid NVM acquire deadlock during NVM update
    - net/mlx5: Fix driver load error flow when firmware is stuck
    - netfilter: conntrack: avoid gcc-10 zero-length-bounds warning
    - IB/mlx4:...