[Hyper-V] netvsc: add rcu_read locked to netvsc callback

[Joshua R. Poulson]

Please add the following upstream commit (and its prerequisites) for SR-IOV on Azure:

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0719e72ccb801829a3d735d187ca8417f0930459

author
stephen hemminger <email address hidden>
2017-01-11 17:16:32 (GMT)
committer
David S. Miller <email address hidden>
2017-01-11 21:13:53 (GMT)
commit
0719e72ccb801829a3d735d187ca8417f0930459 (patch)
tree
a4f718fefcb15433fa59f6d4add44ae220edb806
parent
4ecb1d83f6abe8d49163427f4d431ebe98f8bd5f (diff)
netvsc: add rcu_read locking to netvsc callback
The receive callback (in tasklet context) is using RCU to get reference
to associated VF network device but this is not safe. RCU read lock
needs to be held. Found by running with full lockdep debugging
enabled.

Fixes: f207c10d9823 ("hv_netvsc: use RCU to protect vf_netdev")
Signed-off-by: Stephen Hemminger <email address hidden>
Signed-off-by: David S. Miller <email address hidden>

[Brad Figg (brad-figg)]

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1657540

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.

[Joshua R. Poulson (jrp)]

No log files, request to include upstream commit.

[Tim Gardner (timg-tpi)]

https://lists.ubuntu.com/archives/kernel-team/2017-January/081901.html

[Tim Gardner (timg-tpi)]

https://lists.ubuntu.com/archives/kernel-team/2017-January/081900.html

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.9.0-15.16

---------------
linux (4.9.0-15.16) zesty; urgency=low

  [ Tim Gardner ]

  * Release Tracking Bug
    - LP: #1658101

  * Zesty update to v4.9.5 stable release (LP: #1658099)
    - Input: xpad - use correct product id for x360w controllers
    - Input: i8042 - add Pegatron touchpad to noloop table
    - pinctrl: imx: fix imx_pinctrl_desc initialization
    - pinctrl: sh-pfc: r8a7795: Use lookup function for bias data
    - pinctrl: sh-pfc: Add helper to handle bias lookup table
    - regulator: tps65086: Fix 25mV ranges for BUCK regulators
    - regulator: axp20x: Fix axp809 ldo_io registration error on cold boot
    - drm/tegra: dpaux: Fix error handling
    - drm/vc4: Fix a couple error codes in vc4_cl_lookup_bos()
    - drm/savage: dereferencing an error pointer
    - selftests: do not require bash to run netsocktests testcase
    - selftests: do not require bash for the generated test
    - zram: revalidate disk under init_lock
    - zram: support BDI_CAP_STABLE_WRITES
    - dax: fix deadlock with DAX 4k holes
    - mm: pmd dirty emulation in page fault handler
    - mm: fix devm_memremap_pages crash, use mem_hotplug_{begin, done}
    - ocfs2: fix crash caused by stale lvb with fsdlm plugin
    - mm, memcg: fix the active list aging for lowmem requests when memcg is enabled
    - mm: support anonymous stable page
    - mm/slab.c: fix SLAB freelist randomization duplicate entries
    - mm/hugetlb.c: fix reservation race when freeing surplus pages
    - KVM: x86: fix emulation of "MOV SS, null selector"
    - KVM: eventfd: fix NULL deref irqbypass consumer
    - jump_labels: API for flushing deferred jump label updates
    - KVM: x86: flush pending lapic jump label updates on module unload
    - KVM: x86: fix NULL deref in vcpu_scan_ioapic
    - KVM: x86: add Align16 instruction flag
    - KVM: x86: add asm_safe wrapper
    - KVM: x86: emulate FXSAVE and FXRSTOR
    - KVM: x86: Introduce segmented_write_std
    - efi/libstub/arm*: Pass latest memory map to the kernel
    - efi/x86: Prune invalid memory map entries and fix boot regression
    - x86/efi: Don't allocate memmap through memblock after mm_init()
    - nl80211: fix sched scan netlink socket owner destruction
    - gpio: Move freeing of GPIO hogs before numbing of the device
    - xfs: Timely free truncated dirty pages
    - bridge: netfilter: Fix dropping packets that moving through bridge interface
    - x86/cpu/AMD: Clean up cpu_llc_id assignment per topology feature
    - x86/bugs: Separate AMD E400 erratum and C1E bug
    - x86/CPU/AMD: Fix Bulldozer topology
    - wusbcore: Fix one more crypto-on-the-stack bug
    - usb: musb: fix runtime PM in debugfs
    - USB: serial: kl5kusb105: fix line-state error handling
    - USB: serial: ch341: fix initial modem-control state
    - USB: serial: ch341: fix resume after reset
    - USB: serial: ch341: fix open error handling
    - USB: serial: ch341: fix control-message error handling
    - USB: serial: ch341: fix open and resume after B0
    - Input: elants_i2c - avoid divide by 0 errors on bad touchscreen data
    - i2c: print correct device invalid address
    - i2c: fix kern...

[Thadeu Lima de Souza Cascardo (cascardo)]

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!

[Thadeu Lima de Souza Cascardo (cascardo)]

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-yakkety' to 'verification-done-yakkety'. If the problem still exists, change the tag 'verification-needed-yakkety' to 'verification-failed-yakkety'.

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!

[Joshua R. Poulson (jrp)]

We will verify this fix is in.

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.4.0-63.84

---------------
linux (4.4.0-63.84) xenial; urgency=low

  [ Thadeu Lima de Souza Cascardo ]

  * Release Tracking Bug
    - LP: #1660704

  * Backport Dirty COW patch to prevent wineserver freeze (LP: #1658270)
    - SAUCE: mm: Respect FOLL_FORCE/FOLL_COW for thp

  * Kdump through NMI SMP and single core not working on Ubuntu16.10
    (LP: #1630924)
    - x86/hyperv: Handle unknown NMIs on one CPU when unknown_nmi_panic
    - SAUCE: hv: don't reset hv_context.tsc_page on crash

  * [regression 4.8.0-14 -> 4.8.0-17] keyboard and touchscreen lost on Acer
    Chromebook R11 (LP: #1630238)
    - [Config] CONFIG_PINCTRL_CHERRYVIEW=y

  * Call trace when testing fstat stressor on ppc64el with virtual keyboard and
    mouse present (LP: #1652132)
    - SAUCE: HID: usbhid: Quirk a AMI virtual mouse and keyboard with ALWAYS_POLL

  * VLAN SR-IOV regression for IXGBE driver (LP: #1658491)
    - ixgbe: Force VLNCTRL.VFE to be set in all VMDq paths

  * "Out of memory" errors after upgrade to 4.4.0-59 (LP: #1655842)
    - mm, page_alloc: convert alloc_flags to unsigned
    - mm, compaction: change COMPACT_ constants into enum
    - mm, compaction: distinguish COMPACT_DEFERRED from COMPACT_SKIPPED
    - mm, compaction: simplify __alloc_pages_direct_compact feedback interface
    - mm, compaction: distinguish between full and partial COMPACT_COMPLETE
    - mm, compaction: abstract compaction feedback to helpers
    - mm, oom: protect !costly allocations some more
    - mm: consider compaction feedback also for costly allocation
    - mm, oom, compaction: prevent from should_compact_retry looping for ever for
      costly orders
    - mm, oom: protect !costly allocations some more for !CONFIG_COMPACTION
    - mm, oom: prevent premature OOM killer invocation for high order request

  * Backport 3 patches to fix bugs with AIX clients using IBMVSCSI Target Driver
    (LP: #1657194)
    - SAUCE: ibmvscsis: Fix max transfer length
    - SAUCE: ibmvscsis: fix sleeping in interrupt context
    - SAUCE: ibmvscsis: Fix srp_transfer_data fail return code

  * NVMe: adapter is missing after abnormal shutdown followed by quick reboot,
    quirk needed (LP: #1656913)
    - nvme: apply DELAY_BEFORE_CHK_RDY quirk at probe time too

  * Ubuntu 16.10 KVM SRIOV: if enable sriov while ping flood is running ping
    will stop working (LP: #1625318)
    - PCI: Do any VF BAR updates before enabling the BARs
    - PCI: Ignore BAR updates on virtual functions
    - PCI: Update BARs using property bits appropriate for type
    - PCI: Separate VF BAR updates from standard BAR updates
    - PCI: Don't update VF BARs while VF memory space is enabled
    - PCI: Remove pci_resource_bar() and pci_iov_resource_bar()
    - PCI: Decouple IORESOURCE_ROM_ENABLE and PCI_ROM_ADDRESS_ENABLE
    - PCI: Add comments about ROM BAR updating

  * Linux rtc self test fails in a VM under xenial (LP: #1649718)
    - kvm: x86: Convert ioapic->rtc_status.dest_map to a struct
    - kvm: x86: Track irq vectors in ioapic->rtc_status.dest_map
    - kvm: x86: Check dest_map->vector to match eoi signals for rtc

  * Xenial update to v4.4.44 stable releas...

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux - 4.8.0-38.41

---------------
linux (4.8.0-38.41) yakkety; urgency=low

  [ Thadeu Lima de Souza Cascardo ]

  * Release Tracking Bug
    - LP: #1661232

  * Backport Dirty COW patch to prevent wineserver freeze (LP: #1658270)
    - SAUCE: mm: Respect FOLL_FORCE/FOLL_COW for thp

  * Kdump through NMI SMP and single core not working on Ubuntu16.10
    (LP: #1630924)
    - x86/hyperv: Handle unknown NMIs on one CPU when unknown_nmi_panic
    - SAUCE: hv: don't reset hv_context.tsc_page on crash

  * Call trace when testing fstat stressor on ppc64el with virtual keyboard and
    mouse present (LP: #1652132)
    - HID: usbhid: Quirk a AMI virtual mouse and keyboard with ALWAYS_POLL

  * regression in linux-libc-dev in yakkety: C++ style comments are not allowed
    in ISO C90 (LP: #1659654)
    - generic syscalls: kill cruft from removed pkey syscalls

  * [16.04.2] POWER9 patches on top of 4.8 (LP: #1650263)
    - powerpc/book3s: Add a cpu table entry for different POWER9 revs
    - powerpc/mm/radix: Use different RTS encoding for different POWER9 revs
    - powerpc/mm/radix: Use different pte update sequence for different POWER9
      revs
    - powerpc/mm: Update the HID bit when switching from radix to hash
    - powerpc/64/kexec: NULL check "clear_all" in kexec_sequence
    - powerpc/64/kexec: Fix MMU cleanup on radix
    - powerpc/mm: Add radix flush all with IS=3
    - powerpc/64/kexec: Copy image with MMU off when possible
    - powerpc/64: Simplify adaptation to new ISA v3.00 HPTE format
    - powerpc/mm/radix: Invalidate ERAT on tlbiel for POWER9 DD1
    - powerpc/mm: Fix missing update of HID register on secondary CPUs
    - powerpc/64: Add some more SPRs and SPR bits for POWER9
    - powerpc/64: Provide functions for accessing POWER9 partition table
    - powerpc/powernv: Define real-mode versions of OPAL XICS accessors
    - powerpc/64: Define new ISA v3.00 logical PVR value and PCR register value
    - mm: update mmu_gather range correctly
    - mm/hugetlb: add tlb_remove_hugetlb_entry for handling hugetlb pages
    - mm: add tlb_remove_check_page_size_change to track page size change
    - powerpc: Revert Load Monitor Register Support
    - powerpc/mm: Correct process and partition table max size
    - powernv: Clear SPRN_PSSCR when a POWER9 CPU comes online
    - powerpc/mm/radix: Setup AMOR in HV mode to allow key 0
    - powerpc/mm: Detect instruction fetch denied and report
    - powerpc/mm/radix: Prevent kernel execution of user space
    - powerpc/mm: Rename hugetlb-radix.h to hugetlb.h
    - powerpc/mm/hugetlb: Handle hugepage size supported by hash config
    - powerpc/mm: Introduce _PAGE_LARGE software pte bits
    - powerpc/mm: Add radix__tlb_flush_pte_p9_dd1()
    - powerpc/mm: update radix__ptep_set_access_flag to not do full mm tlb flush
    - powerpc/mm: update radix__pte_update to not do full mm tlb flush
    - powerpc/mm: Batch tlb flush when invalidating pte entries
    - powerpc/sparse: Make a bunch of things static
    - powerpc/perf: factor out the event format field
    - powerpc/perf: update attribute_group data structure
    - powerpc/perf: power9 raw event format en...