snapd

implement errno action logging in seccomp for strict mode with snaps

Bug #1721676 reported by Tyler Hicks on 2017-10-06

This bug affects 2 people

	Status	Importance	Assigned to
snapd	Fix Released	Medium	Tyler Hicks
linux (Ubuntu)	Fix Released	Undecided	Tyler Hicks
Xenial	Fix Released	Undecided	Tyler Hicks
Zesty	Fix Released	Undecided	Tyler Hicks
Artful	Fix Released	Undecided	Tyler Hicks

Bug Description

A requirement for snappy is that security sandbox violations against policy are logged. In this manner learning tools can be written to parse the logs, etc and make developing on snappy easier.

The current default seccomp action, in strict mode. is to kill the snap's thread that violated the policy but this is unfriendly to the developer and to the user. The desired action is to block the illegal system call and return an error with errno set to EPERM. However, seccomp does not emit log events when it takes that action. Seccomp should be updated to emit log events when taking the SECCOMP_RET_ERRNO action and then snappy can switch to the using that action when blocking illegal system calls.

[Impact]

Snapd needs a way to log SECCOMP_RET_ERRNO seccomp actions in order to have a more friendly strict mode. Such functionality has been merged upstream into 4.14-rc2.

No libseccomp changes are needed at this time since snap-confine loads the BPF filter directly into the kernel without using libseccomp.

[Test Case]

Running the libseccomp "live" tests will exercise the kernel's seccomp enforcement and help to help catch any regressions. Note that on Artful, there's an existing test failure (20-live-basic_die%%002-00001):

$ sudo apt build-dep -y libseccomp
$ sudo apt install -y cython
$ apt source libseccomp
$ cd libseccomp-*
$ autoreconf -ivf && ./configure --enable-python && make check-build
$ (cd tests && ./regression -T live)

All tests should pass on zesty (12 tests) and xenial (10 tests). On artful, you'll see one pre-existing failure:
...
Test 20-live-basic_die%%002-00001 result: FAILURE 20-live-basic_die TRAP rc=159
...
Regression Test Summary
tests run: 12
tests skipped: 0
tests passed: 11
tests failed: 1
tests errored: 0
============================================================

----------------------------

Running the seccomp kernel selftests is also a great to exercise seccomp and the kernel patch set proposed for the SRU includes additional seccomp selftests. To build, enter into the root of the kernel source tree and build the seccomp test binary:

$ make -C tools/testing/selftests TARGETS=seccomp

Now you can execute tools/testing/selftests/seccomp/seccomp_bpf or even copy it to a test machine and run it there. On Xenial, 54/54 tests should pass and 58/58 should pass on Zesty.

----------------------------

Now we can run a single test to verify that SECCOMP_RET_ERRNO is logged when the application opts into it. First, verify that "errno" is listed in the actions_logged sysctl:

$ cat /proc/sys/kernel/seccomp/actions_logged
kill trap errno trace log

Now, build and run the test program:

$ gcc -o lp1721676-kernel-test lp1721676-kernel-test.c
$ ./lp1721676-kernel-test
SUCCESS: getpid() failed as expected: Operation not permitted

It should have generated a message like this in /var/log/syslog:

kernel: [79338.804966] audit: type=1326 audit(1507259221.875:27): auid=1000 uid=1000 gid=1000 ses=5 pid=3091 comm="lp1721676-kerne" exe="/home/tyhicks/lp1721676-kernel-test" sig=0 arch=c000003e syscall=39 compat=0 ip=0x7fb91829c499 code=0x50000

Disable errno logging in the sysctl:

$ echo kill trap trace log | sudo tee /proc/sys/kernel/seccomp/actions_logged
kill trap trace log

Rerun the test program and ensure that nothing was logged this time.

[Regression Potential]

The kernel patches received a lot of review between Kees and some others interested in improved seccomp logging. I authored the patches and feel comfortable/confident with my backported versions. They do not change the behavior of seccomp logging by default but offer ways applications to opt into more logging and, on the flipside, ways for the administrator to quite any additional logging.

See original description

Tags:

CVE References

Tyler Hicks (tyhicks) on 2017-10-06

Changed in linux (Ubuntu Xenial):
status:	New → In Progress
assignee:	nobody → Tyler Hicks (tyhicks)
Changed in linux (Ubuntu Zesty):
status:	New → In Progress
assignee:	nobody → Tyler Hicks (tyhicks)
Changed in linux (Ubuntu Artful):
status:	New → Fix Released
assignee:	nobody → Tyler Hicks (tyhicks)

Revision history for this message

Tyler Hicks (tyhicks) wrote on 2017-10-06:

The kernel patches for this feature have already been released in an Artful kernel (4.12.0-13.14).

description:

updated

Tyler Hicks (tyhicks) on 2017-10-06

description:

updated

Tyler Hicks (tyhicks) on 2017-10-06

description:

updated

Revision history for this message

Tyler Hicks (tyhicks) wrote on 2017-10-06:

The Xenial and Zesty kernel patch sets have been sent to the kernel team:

https://lists.ubuntu.com/archives/kernel-team/2017-October/087448.html
https://lists.ubuntu.com/archives/kernel-team/2017-October/087456.html

Thadeu Lima de Souza Cascardo (cascardo) on 2017-10-06

Changed in linux (Ubuntu Xenial):
status:	In Progress → Fix Committed

Thadeu Lima de Souza Cascardo (cascardo) on 2017-10-06

Changed in linux (Ubuntu Zesty):
status:	In Progress → Fix Committed

Revision history for this message

Tyler Hicks (tyhicks) wrote on 2017-10-11:

lp1721676-kernel-test.c Edit (2.3 KiB, text/x-csrc)

Here's the kernel test case that I mentioned in the bug description.

Revision history for this message

Kleber Sacilotto de Souza (kleber-souza) wrote on 2017-10-18:

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!

tags:	added: verification-needed-xenial
tags:	added: verification-needed-zesty

Revision history for this message

Kleber Sacilotto de Souza (kleber-souza) wrote on 2017-10-18:

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

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!

Revision history for this message

Tyler Hicks (tyhicks) wrote on 2017-10-18:

I tested the linux kernel SRU in Xenial and Zesty using the following linux package versions:

- xenial: linux-image-4.4.0-98-generic 4.4.0-98.121
- zesty: linux-image-4.10.0-38-generic 4.10.0-38.42

The linux kernel SRU testing was successful and followed what's documented in the [Test Case] section of this bug description.

tags:

added: verification-done-xenial verification-done-zesty
removed: verification-needed-xenial verification-needed-zesty

Revision history for this message

Launchpad Janitor (janitor) wrote on 2017-10-30:

Download full text (4.4 KiB)

This bug was fixed in the package linux - 4.10.0-38.42

---------------
linux (4.10.0-38.42) zesty; urgency=low

* linux: 4.10.0-38.42 -proposed tracker (LP: #1722330)

  * Controller lockup detected on ProLiant DL380 Gen9 with P440 Controller
    (LP: #1720359)
    - scsi: hpsa: limit transfer length to 1MB

  * [Dell Docking IE][0bda:8153] Realtek USB Ethernet leads to system hang
    (LP: #1720977)
    - r8152: fix the list rx_done may be used without initialization

* Touchpad not detected in Lenovo X1 Yoga / Yoga 720-15IKB (LP: #1700657)
- mfd: intel-lpss: Add missing PCI ID for Intel Sunrise Point LPSS devices

* Add installer support for Broadcom BCM573xx network drivers. (LP: #1720466)
- d-i: Add bnxt_en to nic-modules.

* CVE-2017-1000252
- KVM: VMX: Do not BUG() on out-of-bounds guest IRQ

* CVE-2017-10663
- f2fs: sanity check checkpoint segno and blkoff

* xfstest sanity checks on seek operations fails (LP: #1696049)
- xfs: fix off-by-one on max nr_pages in xfs_find_get_desired_pgoff()

  * [P9, Power NV][ WSP][Ubuntu 16.04.03] : perf hw breakpoint command results
    in call traces and system goes for reboot. (LP: #1706033)
    - powerpc/64s: Handle data breakpoints in Radix mode

  * 5U84 - ses driver isn't binding right - cannot blink lights on 1 of the 2
    5u84 (LP: #1693369)
    - scsi: ses: do not add a device to an enclosure if enclosure_add_links()
      fails.

* Vlun resize request could fail with cxlflash driver (LP: #1713575)
- scsi: cxlflash: Fix vlun resize failure in the shrink path

* More migrations with constant load (LP: #1713576)
- sched/fair: Prefer sibiling only if local group is under-utilized

* New PMU fixes for marked events. (LP: #1716491)
- powerpc/perf: POWER9 PMU stops after idle workaround

* CVE-2017-14340
- xfs: XFS_IS_REALTIME_INODE() should be false if no rt device present

  * [Zesty][Yakkety] rtl8192e bug fixes (LP: #1698470)
    - staging: rtl8192e: rtl92e_fill_tx_desc fix write to mapped out memory.
    - staging: rtl8192e: fix 2 byte alignment of register BSSIDR.
    - staging: rtl8192e: rtl92e_get_eeprom_size Fix read size of EPROM_CMD.
    - staging: rtl8192e: GetTs Fix invalid TID 7 warning.

  * Stranded with ENODEV after mdadm --readonly (LP: #1706243)
    - md: MD_CLOSING needs to be cleared after called md_set_readonly or
      do_md_stop

  * multipath -ll is not showing the disks which are actually multipath
    (LP: #1718397)
    - fs: aio: fix the increment of aio-nr and counting against aio-max-nr

  * ETPS/2 Elantech Touchpad inconsistently detected (Gigabyte P57W laptop)
    (LP: #1594214)
    - Input: i8042 - add Gigabyte P57 to the keyboard reset table

* CVE-2017-10911
- xen-blkback: don't leak stack data via response ring

* CVE-2017-11176
- mqueue: fix a use-after-free in sys_mq_notify()

This bug was fixed in the package linux - 4.10.0-38.42

---------------
linux (4.10.0-38.42) zesty; urgency=low

* linux: 4.10.0-38.42 -proposed tracker (LP: #1722330)

* Controller lockup detected on ProLiant DL380 Gen9 with P440 Controller
    (LP: #1720359)
    - scsi: hpsa: limit transfer length to 1MB

* [Dell Docking IE][0bda:8153] Realtek USB Ethernet leads to system hang
    (LP: #1720977)
    - r8152: fix the list rx_done may be used without initialization

* Touchpad not detected in Lenovo X1 Yoga / Yoga 720-15IKB (LP: #1700657)
    - mfd: intel-lpss: Add missing PCI ID for Intel Sunrise Point LPSS devices

* Add installer support for Broadcom BCM573xx network drivers. (LP: #1720466)
    - d-i: Add bnxt_en to nic-modules.

* CVE-2017-1000252
    - KVM: VMX: Do not BUG() on out-of-bounds guest IRQ

* CVE-2017-10663
    - f2fs: sanity check checkpoint segno and blkoff

* xfstest sanity checks on seek operations fails (LP: #1696049)
    - xfs: fix off-by-one on max nr_pages in xfs_find_get_desired_pgoff()

* [P9, Power NV][ WSP][Ubuntu 16.04.03] : perf hw breakpoint command results
    in call traces and system goes for reboot. (LP: #1706033)
    - powerpc/64s: Handle data breakpoints in Radix mode

* 5U84 - ses driver isn't binding right - cannot blink lights on 1 of the 2
    5u84 (LP: #1693369)
    - scsi: ses: do not add a device to an enclosure if enclosure_add_links()
      fails.

* Vlun resize request could fail with cxlflash driver (LP: #1713575)
    - scsi: cxlflash: Fix vlun resize failure in the shrink path

* More migrations with constant load (LP: #1713576)
    - sched/fair: Prefer sibiling only if local group is under-utilized

* New PMU fixes for marked events. (LP: #1716491)
    - powerpc/perf: POWER9 PMU stops after idle workaround

* CVE-2017-14340
    - xfs: XFS_IS_REALTIME_INODE() should be false if no rt device present

* Stranded with ENODEV after mdadm --readonly (LP: #1706243)
    - md: MD_CLOSING needs to be cleared after called md_set_readonly or
      do_md_stop

* multipath -ll is not showing the disks which are actually multipath
    (LP: #1718397)
    - fs: aio: fix the increment of aio-nr and counting against aio-max-nr

* ETPS/2 Elantech Touchpad inconsistently detected (Gigabyte P57W laptop)
    (LP: #1594214)
    - Input: i8042 - add Gigabyte P57 to the keyboard reset table

* CVE-2017-10911
    - xen-blkback: don't leak stack data via response ring

* CVE-2017-11176
    - mqueue: fix a use-after-free in sys_mq_notify()

* implement 'complain mode' in seccomp for developer mode with snaps
    (LP: #1567597)
    - Revert "UBUNTU: SAUCE: seccomp: log actions even when audit is disabled"
    - seccomp: Provide matching filter for introspection
    - seccomp: Sysctl to display available actions
    - seccomp: Operation for checking if an action is available
    - seccomp: Sysctl to configure actions that are allowed to be logged
    - seccomp: Selftest for detection of filter flag support
    - seccomp: Action to log before allowing

* implement errno action logging in seccomp for strict mode with snaps
    (LP: #1721676)
    - Revert "UBUNTU: SAUCE: seccomp: log actions even when audit is disabled"
    - seccomp: Provide matching filter for introspection
    - seccomp: Sysctl to display available actions
    - seccomp: Operation for checking if an action is available
    - seccomp: Sysctl to configure actions that are allowed to be logged
    - seccomp: Selftest for detection of filter flag support
    - seccomp: Filter flag to log all actions except SECCOMP_RET_ALLOW

* Backport recent bbr bugfixes to 4.10 kernel (LP: #1708604)
    - tcp_bbr: cut pacing rate only if filled pipe
    - tcp_bbr: introduce bbr_bw_to_pacing_rate() helper
    - tcp_bbr: introduce bbr_init_pacing_rate_from_rtt() helper
    - tcp_bbr: remove sk_pacing_rate=0 transient during init
    - tcp_bbr: init pacing rate on first RTT sample

* [SRU][Zesty] Fix lscpu segfault on ARM64 with SMBIOS v2.0 (LP: #1716483)
    - arm64: kernel: restrict /dev/mem read() calls to linear region

-- Kleber Sacilotto de Souza <kleber.souza@canonical.com>  Tue, 10 Oct 2017 13:49:34 +0200

Changed in linux (Ubuntu Zesty):
status:	Fix Committed → Fix Released

Revision history for this message

Launchpad Janitor (janitor) wrote on 2017-10-30:

Download full text (11.5 KiB)

This bug was fixed in the package linux - 4.4.0-98.121

---------------
linux (4.4.0-98.121) xenial; urgency=low

* linux: 4.4.0-98.121 -proposed tracker (LP: #1722299)

  * Controller lockup detected on ProLiant DL380 Gen9 with P440 Controller
    (LP: #1720359)
    - scsi: hpsa: limit transfer length to 1MB

  * [Dell Docking IE][0bda:8153] Realtek USB Ethernet leads to system hang
    (LP: #1720977)
    - r8152: fix the list rx_done may be used without initialization

* Add installer support for Broadcom BCM573xx network drivers. (LP: #1720466)
- d-i: Add bnxt_en to nic-modules.

* snapcraft.yaml: add dpkg-dev to the build deps (LP: #1718886)
- snapcraft.yaml: add dpkg-dev to the build deps

* Support setting I2C_TIMEOUT via ioctl for i2c-designware (LP: #1718578)
- i2c: designware: Use transfer timeout from ioctl I2C_TIMEOUT

  * 5U84 - ses driver isn't binding right - cannot blink lights on 1 of the 2
    5u84 (LP: #1693369)
    - scsi_transport_sas: add function to get SAS endpoint address
    - ses: fix discovery of SATA devices in SAS enclosures
    - scsi: sas: provide stub implementation for scsi_is_sas_rphy
    - scsi: ses: Fix SAS device detection in enclosure

  * multipath -ll is not showing the disks which are actually multipath
    (LP: #1718397)
    - fs: aio: fix the increment of aio-nr and counting against aio-max-nr

* Support Dell Wireless DW5819/5818 WWAN devices (LP: #1721455)
- SAUCE: USB: serial: qcserial: add Dell DW5818, DW5819

* CVE-2017-10911
- xen-blkback: don't leak stack data via response ring

  * implement 'complain mode' in seccomp for developer mode with snaps
    (LP: #1567597)
    - seccomp: Provide matching filter for introspection
    - seccomp: Sysctl to display available actions
    - seccomp: Operation for checking if an action is available
    - seccomp: Sysctl to configure actions that are allowed to be logged
    - seccomp: Selftest for detection of filter flag support
    - seccomp: Action to log before allowing

  * implement errno action logging in seccomp for strict mode with snaps
    (LP: #1721676)
    - seccomp: Provide matching filter for introspection
    - seccomp: Sysctl to display available actions
    - seccomp: Operation for checking if an action is available
    - seccomp: Sysctl to configure actions that are allowed to be logged
    - seccomp: Selftest for detection of filter flag support
    - seccomp: Filter flag to log all actions except SECCOMP_RET_ALLOW

* [Xenial] update OpenNSL kernel modules to 6.5.10 (LP: #1721511)
- SAUCE: update OpenNSL kernel modules to 6.5.10

This bug was fixed in the package linux - 4.4.0-98.121

---------------
linux (4.4.0-98.121) xenial; urgency=low

* linux: 4.4.0-98.121 -proposed tracker (LP: #1722299)

* Controller lockup detected on ProLiant DL380 Gen9 with P440 Controller
    (LP: #1720359)
    - scsi: hpsa: limit transfer length to 1MB

* [Dell Docking IE][0bda:8153] Realtek USB Ethernet leads to system hang
    (LP: #1720977)
    - r8152: fix the list rx_done may be used without initialization

* Add installer support for Broadcom BCM573xx network drivers. (LP: #1720466)
    - d-i: Add bnxt_en to nic-modules.

* snapcraft.yaml: add dpkg-dev to the build deps (LP: #1718886)
    - snapcraft.yaml: add dpkg-dev to the build deps

* Support setting I2C_TIMEOUT via ioctl for i2c-designware (LP: #1718578)
    - i2c: designware: Use transfer timeout from ioctl I2C_TIMEOUT

* multipath -ll is not showing the disks which are actually multipath
    (LP: #1718397)
    - fs: aio: fix the increment of aio-nr and counting against aio-max-nr

* Support Dell Wireless DW5819/5818 WWAN devices (LP: #1721455)
    - SAUCE: USB: serial: qcserial: add Dell DW5818, DW5819

* CVE-2017-10911
    - xen-blkback: don't leak stack data via response ring

* [Xenial] update OpenNSL kernel modules to 6.5.10 (LP: #1721511)
    - SAUCE: update OpenNSL kernel modules to 6.5.10

* Xenial update to 4.4.90 stable release (LP: #1721550)
    - cifs: release auth_key.response for reconnect.
    - mac80211: flush hw_roc_start work before cancelling the ROC
    - KVM: PPC: Book3S: Fix race and leak in kvm_vm_ioctl_create_spapr_tce()
    - tracing: Fix trace_pipe behavior for instance traces
    - tracing: Erase irqsoff trace with empty write
    - md/raid5: fix a race condition in stripe batch
    - md/raid5: preserve STRIPE_ON_UNPLUG_LIST in break_stripe_batch_list
    - scsi: scsi_transport_iscsi: fix the issue that iscsi_if_rx doesn't parse
      nlmsg properly
    - crypto: talitos - Don't provide setkey for non hmac hashing algs.
    - crypto: talitos - fix sha224
    - KEYS: fix writing past end of user-supplied buffer in keyring_read()
    - KEYS: prevent creating a different user's keyrings
    - KEYS: prevent KEYCTL_READ on negative key
    - powerpc/pseries: Fix parent_dn reference leak in add_dt_node()
    - Fix SMB3.1.1 guest authentication to Samba
    - SMB: Validate negotiate (to protect against downgrade) even if signing off
    - SMB3: Don't ignore O_SYNC/O_DSYNC and O_DIRECT flags
    - vfs: Return -ENXIO for negative SEEK_HOLE / SEEK_DATA offsets
    - nl80211: check for the required netlink attributes presence
    - bsg-lib: don't free job in bsg_prepare_job
    - seccomp: fix the usage of get/put_seccomp_filter() in seccomp_get_filter()
    - arm64: Make sure SPsel is always set
    - arm64: fault: Route pte translation faults via do_translation_fault
    - KVM: VMX: Do not BUG() on out-of-bounds guest IRQ
    - kvm: nVMX: Don't allow L2 to access the hardware CR8
    - PCI: Fix race condition with driver_override
    - btrfs: fix NULL pointer dereference from free_reloc_roots()
    - btrfs: propagate error to btrfs_cmp_data_prepare caller
    - btrfs: prevent to set invalid default subvolid
    - x86/fpu: Don't let userspace set bogus xcomp_bv
    - gfs2: Fix debugfs glocks dump
    - timer/sysclt: Restrict timer migration sysctl values to 0 and 1
    - KVM: VMX: do not change SN bit in vmx_update_pi_irte()
    - KVM: VMX: remove WARN_ON_ONCE in kvm_vcpu_trigger_posted_interrupt
    - cxl: Fix driver use count
    - dmaengine: mmp-pdma: add number of requestors
    - ARM: pxa: add the number of DMA requestor lines
    - ARM: pxa: fix the number of DMA requestor lines
    - KVM: VMX: use cmpxchg64
    - video: fbdev: aty: do not leak uninitialized padding in clk to userspace
    - swiotlb-xen: implement xen_swiotlb_dma_mmap callback
    - fix xen_swiotlb_dma_mmap prototype
    - Linux 4.4.90

* Xenial update to 4.4.89 stable release (LP: #1721477)
    - ipv6: accept 64k - 1 packet length in ip6_find_1stfragopt()
    - ipv6: add rcu grace period before freeing fib6_node
    - ipv6: fix sparse warning on rt6i_node
    - qlge: avoid memcpy buffer overflow
    - Revert "net: phy: Correctly process PHY_HALTED in phy_stop_machine()"
    - Revert "net: use lib/percpu_counter API for fragmentation mem accounting"
    - Revert "net: fix percpu memory leaks"
    - gianfar: Fix Tx flow control deactivation
    - ipv6: fix memory leak with multiple tables during netns destruction
    - ipv6: fix typo in fib6_net_exit()
    - f2fs: check hot_data for roll-forward recovery
    - x86/fsgsbase/64: Report FSBASE and GSBASE correctly in core dumps
    - md/raid5: release/flush io in raid5_do_work()
    - nfsd: Fix general protection fault in release_lock_stateid()
    - mm: prevent double decrease of nr_reserved_highatomic
    - tty: improve tty_insert_flip_char() fast path
    - tty: improve tty_insert_flip_char() slow path
    - tty: fix __tty_insert_flip_char regression
    - Input: i8042 - add Gigabyte P57 to the keyboard reset table
    - MIPS: math-emu: <MAX|MAXA|MIN|MINA>.<D|S>: Fix quiet NaN propagation
    - MIPS: math-emu: <MAX|MAXA|MIN|MINA>.<D|S>: Fix cases of both inputs zero
    - MIPS: math-emu: <MAX|MIN>.<D|S>: Fix cases of both inputs negative
    - MIPS: math-emu: <MAXA|MINA>.<D|S>: Fix cases of input values with opposite
      signs
    - MIPS: math-emu: <MAXA|MINA>.<D|S>: Fix cases of both infinite inputs
    - MIPS: math-emu: MINA.<D|S>: Fix some cases of infinity and zero inputs
    - crypto: AF_ALG - remove SGL terminator indicator when chaining
    - ext4: fix incorrect quotaoff if the quota feature is enabled
    - ext4: fix quota inconsistency during orphan cleanup for read-only mounts
    - powerpc: Fix DAR reporting when alignment handler faults
    - block: Relax a check in blk_start_queue()
    - md/bitmap: disable bitmap_resize for file-backed bitmaps.
    - skd: Avoid that module unloading triggers a use-after-free
    - skd: Submit requests to firmware before triggering the doorbell
    - scsi: zfcp: fix queuecommand for scsi_eh commands when DIX enabled
    - scsi: zfcp: add handling for FCP_RESID_OVER to the fcp ingress path
    - scsi: zfcp: fix capping of unsuccessful GPN_FT SAN response trace records
    - scsi: zfcp: fix passing fsf_req to SCSI trace on TMF to correlate with HBA
    - scsi: zfcp: fix missing trace records for early returns in TMF eh handlers
    - scsi: zfcp: fix payload with full FCP_RSP IU in SCSI trace records
    - scsi: zfcp: trace HBA FSF response by default on dismiss or timedout late
      response
    - scsi: zfcp: trace high part of "new" 64 bit SCSI LUN
    - scsi: megaraid_sas: Check valid aen class range to avoid kernel panic
    - scsi: megaraid_sas: Return pended IOCTLs with cmd_status
      MFI_STAT_WRONG_STATE in case adapter is dead
    - scsi: storvsc: fix memory leak on ring buffer busy
    - scsi: sg: remove 'save_scat_len'
    - scsi: sg: use standard lists for sg_requests
    - scsi: sg: off by one in sg_ioctl()
    - scsi: sg: factor out sg_fill_request_table()
    - scsi: sg: fixup infoleak when using SG_GET_REQUEST_TABLE
    - scsi: qla2xxx: Fix an integer overflow in sysfs code
    - ftrace: Fix selftest goto location on error
    - tracing: Apply trace_clock changes to instance max buffer
    - ARC: Re-enable MMU upon Machine Check exception
    - PCI: shpchp: Enable bridge bus mastering if MSI is enabled
    - media: v4l2-compat-ioctl32: Fix timespec conversion
    - media: uvcvideo: Prevent heap overflow when accessing mapped controls
    - bcache: initialize dirty stripes in flash_dev_run()
    - bcache: Fix leak of bdev reference
    - bcache: do not subtract sectors_to_gc for bypassed IO
    - bcache: correct cache_dirty_target in __update_writeback_rate()
    - bcache: Correct return value for sysfs attach errors
    - bcache: fix for gc and write-back race
    - bcache: fix bch_hprint crash and improve output
    - ftrace: Fix memleak when unregistering dynamic ops when tracing disabled
    - Linux 4.4.89

* ETPS/2 Elantech Touchpad inconsistently detected (Gigabyte P57W laptop)
    (LP: #1594214)
    - Input: i8042 - add Gigabyte P57 to the keyboard reset table

* Xenial update to 4.4.88 stable release (LP: #1718195)
    - usb: quirks: add delay init quirk for Corsair Strafe RGB keyboard
    - USB: serial: option: add support for D-Link DWM-157 C1
    - usb: Add device quirk for Logitech HD Pro Webcam C920-C
    - usb:xhci:Fix regression when ATI chipsets detected
    - USB: core: Avoid race of async_completed() w/ usbdev_release()
    - staging/rts5208: fix incorrect shift to extract upper nybble
    - driver core: bus: Fix a potential double free
    - intel_th: pci: Add Cannon Lake PCH-H support
    - intel_th: pci: Add Cannon Lake PCH-LP support
    - ath10k: fix memory leak in rx ring buffer allocation
    - rtlwifi: rtl_pci_probe: Fix fail path of _rtl_pci_find_adapter
    - Bluetooth: Add support of 13d3:3494 RTL8723BE device
    - dlm: avoid double-free on error path in dlm_device_{register,unregister}
    - mwifiex: correct channel stat buffer overflows
    - drm/nouveau/pci/msi: disable MSI on big-endian platforms by default
    - workqueue: Fix flag collision
    - cs5536: add support for IDE controller variant
    - scsi: sg: protect against races between mmap() and SG_SET_RESERVED_SIZE
    - scsi: sg: recheck MMAP_IO request length with lock held
    - drm: adv7511: really enable interrupts for EDID detection
    - drm/bridge: adv7511: Fix mutex deadlock when interrupts are disabled
    - drm/bridge: adv7511: Use work_struct to defer hotplug handing to out of irq
      context
    - drm/bridge: adv7511: Switch to using drm_kms_helper_hotplug_event()
    - drm/bridge: adv7511: Re-write the i2c address before EDID probing
    - btrfs: resume qgroup rescan on rw remount
    - locktorture: Fix potential memory leak with rw lock test
    - ALSA: msnd: Optimize / harden DSP and MIDI loops
    - ARM: 8692/1: mm: abort uaccess retries upon fatal signal
    - NFS: Fix 2 use after free issues in the I/O code
    - xfs: XFS_IS_REALTIME_INODE() should be false if no rt device present
    - Linux 4.4.88

* Kernel has troule recognizing Corsair Strafe RGB keyboard (LP: #1678477)
    - usb: quirks: add delay init quirk for Corsair Strafe RGB keyboard

-- Thadeu Lima de Souza Cascardo <cascardo@canonical.com>  Tue, 10 Oct 2017 08:52:24 -0300

Changed in linux (Ubuntu Xenial):
status:	Fix Committed → Fix Released

Revision history for this message

Tyler Hicks (tyhicks) wrote on 2017-12-15:

The snapd pull request is located here: https://github.com/snapcore/snapd/pull/3998/

Revision history for this message

Zygmunt Krynicki (zyga) wrote on 2019-10-29:

#10

This has been fixed and is available in snapd for multiple releases now. I'm marking it as fix released.

Changed in snappy:
status:	In Progress → Fix Released
affects:	snappy → snapd

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