The openSUSE Leap 42.2 kernel was updated to 4.4.56 fix various security issues and bugs.

The following security bugs were fixed:

- CVE-2017-7184: The xfrm_replay_verify_len function in net/xfrm/xfrm_user.c in the Linux kernel did not validate certain size data after an XFRM_MSG_NEWAE update, which allowed local users to obtain root privileges or cause a denial of service (heap-based out-of-bounds access) by leveraging the CAP_NET_ADMIN capability, as demonstrated during a Pwn2Own competition at CanSecWest 2017 for the Ubuntu 16.10 linux-image-* package 4.8.0.41.52 (bnc#1030573).
- CVE-2016-10200: Race condition in the L2TPv3 IP Encapsulation feature in the Linux kernel allowed local users to gain privileges or cause a denial of service (use-after-free) by making multiple bind system calls without properly ascertaining whether a socket has the SOCK_ZAPPED status, related to net/l2tp/l2tp_ip.c and net/l2tp/l2tp_ip6.c (bnc#1028415).
- CVE-2017-2636: Race condition in drivers/tty/n_hdlc.c in the Linux kernel allowed local users to gain privileges or cause a denial of service (double free) by setting the HDLC line discipline (bnc#1027565).
- CVE-2017-6345: The LLC subsystem in the Linux kernel did not ensure that a certain destructor exists in required circumstances, which allowed local users to cause a denial of service (BUG_ON) or possibly have unspecified other impact via crafted system calls (bnc#1027190).
- CVE-2017-6346: Race condition in net/packet/af_packet.c in the Linux kernel allowed local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a multithreaded application that made PACKET_FANOUT setsockopt system calls (bnc#1027189).
- CVE-2017-6353: net/sctp/socket.c in the Linux kernel did not properly restrict association peel-off operations during certain wait states, which allowed local users to cause a denial of service (invalid unlock and double free) via a multithreaded application. NOTE: this vulnerability exists because of an incorrect fix for CVE-2017-5986 (bnc#1025235).
- CVE-2017-6214: The tcp_splice_read function in net/ipv4/tcp.c in the Linux kernel allowed remote attackers to cause a denial of service (infinite loop and soft lockup) via vectors involving a TCP packet with the URG flag (bnc#1026722).
- CVE-2016-2117: The atl2_probe function in drivers/net/ethernet/atheros/atlx/atl2.c in the Linux kernel incorrectly enables scatter/gather I/O, which allowed remote attackers to obtain sensitive information from kernel memory by reading packet data (bnc#968697).
- CVE-2017-6347: The ip_cmsg_recv_checksum function in net/ipv4/ip_sockglue.c in the Linux kernel has incorrect expectations about skb data layout, which allowed local users to cause a denial of service (buffer over-read) or possibly have unspecified other impact via crafted system calls, as demonstrated by use of the MSG_MORE flag in conjunction with loopback UDP transmission (bnc#1027179).
- CVE-2016-9191: The cgroup offline implementation in the Linux kernel mishandled certain drain operations, which allowed local users to cause a denial of service (system hang) by leveraging access to a container environment for executing a crafted application, as demonstrated by trinity (bnc#1008842).
- CVE-2017-2596: The nested_vmx_check_vmptr function in arch/x86/kvm/vmx.c in the Linux kernel improperly emulates the VMXON instruction, which allowed KVM L1 guest OS users to cause a denial of service (host OS memory consumption) by leveraging the mishandling of page references (bnc#1022785).

The following non-security bugs were fixed:

- ACPI: Do not create a platform_device for IOAPIC/IOxAPIC (bsc#1028819).
- ACPI, ioapic: Clear on-stack resource before using it (bsc#1028819).
- ACPI: Remove platform devices from a bus on removal (bsc#1028819).
- add mainline tag to one hyperv patch
- bnx2x: allow adding VLANs while interface is down (bsc#1027273).
- btrfs: backref: Fix soft lockup in __merge_refs function (bsc#1017641).
- btrfs: incremental send, do not delay rename when parent inode is new (bsc#1028325).
- btrfs: incremental send, do not issue invalid rmdir operations (bsc#1028325).
- btrfs: qgroup: Move half of the qgroup accounting time out of commit trans (bsc#1017461).
- btrfs: send, fix failure to rename top level inode due to name collision (bsc#1028325).
- btrfs: serialize subvolume mounts with potentially mismatching rw flags (bsc#951844 bsc#1024015)
- crypto: algif_hash - avoid zero-sized array (bnc#1007962).
- cxgb4vf: do not offload Rx checksums for IPv6 fragments (bsc#1026692).
- drivers: hv: vmbus: Prevent sending data on a rescinded channel (fate#320485, bug#1028217).
- drm/i915: Add intel_uncore_suspend / resume functions (bsc#1011913).
- drm/i915: Listen for PMIC bus access notifications (bsc#1011913).
- drm/mgag200: Added support for the new device G200eH3 (bsc#1007959, fate#322780)
- ext4: fix fencepost in s_first_meta_bg validation (bsc#1029986).
- Fix kABI breakage of dccp in 4.4.56 (stable-4.4.56).
- futex: Add missing error handling to FUTEX_REQUEUE_PI (bsc#969755).
- futex: Fix potential use-after-free in FUTEX_REQUEUE_PI (bsc#969755).
- i2c: designware-baytrail: Acquire P-Unit access on bus acquire (bsc#1011913).
- i2c: designware-baytrail: Call pmic_bus_access_notifier_chain (bsc#1011913).
- i2c: designware-baytrail: Fix race when resetting the semaphore (bsc#1011913).
- i2c: designware-baytrail: Only check iosf_mbi_available() for shared hosts (bsc#1011913).
- i2c: designware: Disable pm for PMIC i2c-bus even if there is no _SEM method (bsc#1011913).
- i2c-designware: increase timeout (bsc#1011913).
- i2c: designware: Never suspend i2c-busses used for accessing the system PMIC (bsc#1011913).
- i2c: designware: Rename accessor_flags to flags (bsc#1011913).
- kABI: protect struct iscsi_conn (kabi).
- kABI: protect struct se_node_acl (kabi).
- kABI: restore can_rx_register parameters (kabi).
- kgr/module: make a taint flag module-specific (fate#313296).
- kgr: remove all arch-specific kgraft header files (fate#313296).
- l2tp: fix address test in __l2tp_ip6_bind_lookup() (bsc#1028415).
- l2tp: fix lookup for sockets not bound to a device in l2tp_ip (bsc#1028415).
- l2tp: fix racy socket lookup in l2tp_ip and l2tp_ip6 bind() (bsc#1028415).
- l2tp: hold socket before dropping lock in l2tp_ip{, 6}_recv() (bsc#1028415).
- l2tp: lock socket before checking flags in connect() (bsc#1028415).
- md/raid1: add rcu protection to rdev in fix_read_error (References: bsc#998106,bsc#1020048,bsc#982783).
- md/raid1: fix a use-after-free bug (bsc#998106,bsc#1020048,bsc#982783).
- md/raid1: handle flush request correctly (bsc#998106,bsc#1020048,bsc#982783).
- md/raid1: Refactor raid1_make_request (bsc#998106,bsc#1020048,bsc#982783).
- mm: fix set pageblock migratetype in deferred struct page init (bnc#1027195).
- mm/page_alloc: Remove useless parameter of __free_pages_boot_core (bnc#1027195).
- module: move add_taint_module() to a header file (fate#313296).
- net/ena: change condition for host attribute configuration (bsc#1026509).
- net/ena: change driver's default timeouts (bsc#1026509).
- net: ena: change the return type of ena_set_push_mode() to be void (bsc#1026509).
- net: ena: Fix error return code in ena_device_init() (bsc#1026509).
- net/ena: fix ethtool RSS flow configuration (bsc#1026509).
- net/ena: fix NULL dereference when removing the driver after device reset failed (bsc#1026509).
- net/ena: fix potential access to freed memory during device reset (bsc#1026509).
- net/ena: fix queues number calculation (bsc#1026509).
- net/ena: fix RSS default hash configuration (bsc#1026509).
- net/ena: reduce the severity of ena printouts (bsc#1026509).
- net/ena: refactor ena_get_stats64 to be atomic context safe (bsc#1026509).
- net/ena: remove ntuple filter support from device feature list (bsc#1026509).
- net: ena: remove superfluous check in ena_remove() (bsc#1026509).
- net: ena: Remove unnecessary pci_set_drvdata() (bsc#1026509).
- net/ena: update driver version to 1.1.2 (bsc#1026509).
- net/ena: use READ_ONCE to access completion descriptors (bsc#1026509).
- net: ena: use setup_timer() and mod_timer() (bsc#1026509).
- net/mlx4_core: Avoid command timeouts during VF driver device shutdown (bsc#1028017).
- net/mlx4_core: Avoid delays during VF driver device shutdown (bsc#1028017).
- net/mlx4_core: Fix racy CQ (Completion Queue) free (bsc#1028017).
- net/mlx4_core: Fix when to save some qp context flags for dynamic VST to VGT transitions (bsc#1028017).
- net/mlx4_core: Use cq quota in SRIOV when creating completion EQs (bsc#1028017).
- net/mlx4_en: Fix bad WQE issue (bsc#1028017).
- NFS: do not try to cross a mountpount when there isn't one there (bsc#1028041).
- nvme: Do not suspend admin queue that wasn't created (bsc#1026505).
- nvme: Suspend all queues before deletion (bsc#1026505).
- PCI: hv: Fix wslot_to_devfn() to fix warnings on device removal (fate#320485, bug#1028217).
- PCI: hv: Use device serial number as PCI domain (fate#320485, bug#1028217).
- powerpc: Blacklist GCC 5.4 6.1 and 6.2 (boo#1028895).
- RAID1: a new I/O barrier implementation to remove resync window (bsc#998106,bsc#1020048,bsc#982783).
- RAID1: avoid unnecessary spin locks in I/O barrier code (bsc#998106,bsc#1020048,bsc#982783).
- Revert "give up on gcc ilog2() constant optimizations" (kabi).
- Revert "net: introduce device min_header_len" (kabi).
- Revert "net/mlx4_en: Avoid unregister_netdev at shutdown flow" (bsc#1028017).
- Revert "nfit, libnvdimm: fix interleave set cookie calculation" (kabi).
- Revert "RDMA/core: Fix incorrect structure packing for booleans" (kabi).
- Revert "target: Fix NULL dereference during LUN lookup + active I/O shutdown" (kabi).
- rtlwifi: rtl_usb: Fix missing entry in USB driver's private data (bsc#1026462).
- s390/kmsg: add missing kmsg descriptions (bnc#1025683, LTC#151573).
- s390/mm: fix zone calculation in arch_add_memory() (bnc#1025683, LTC#152318).
- sched/loadavg: Avoid loadavg spikes caused by delayed NO_HZ accounting (bsc#1018419).
- scsi_dh_alua: Do not modify the interval value for retries (bsc#1012910).
- scsi: do not print 'reservation conflict' for TEST UNIT READY (bsc#1027054).
- softirq: Let ksoftirqd do its job (bsc#1019618).
- supported.conf: Add tcp_westwood as supported module (fate#322432)
- taint/module: Clean up global and module taint flags handling (fate#313296).
- Update mainline reference in patches.drivers/drm-ast-Fix-memleaks-in-error-path-in-ast_fb_create.patch See (bsc#1028158) for the context in which this was discovered upstream.
- x86/apic/uv: Silence a shift wrapping warning (bsc#1023866).
- x86/mce: Do not print MCEs when mcelog is active (bsc#1013994).
- x86, mm: fix gup_pte_range() vs DAX mappings (bsc#1026405).
- x86/mm/gup: Simplify get_user_pages() PTE bit handling (bsc#1026405).
- x86/platform/intel/iosf_mbi: Add a mutex for P-Unit access (bsc#1011913).
- x86/platform/intel/iosf_mbi: Add a PMIC bus access notifier (bsc#1011913).
- x86/platform: Remove warning message for duplicate NMI handlers (bsc#1029220).
- x86/platform/UV: Add basic CPU NMI health check (bsc#1023866).
- x86/platform/UV: Add Support for UV4 Hubless NMIs (bsc#1023866).
- x86/platform/UV: Add Support for UV4 Hubless systems (bsc#1023866).
- x86/platform/UV: Clean up the NMI code to match current coding style (bsc#1023866).
- x86/platform/UV: Clean up the UV APIC code (bsc#1023866).
- x86/platform/UV: Ensure uv_system_init is called when necessary (bsc#1023866).
- x86/platform/UV: Fix 2 socket config problem (bsc#1023866).
- x86/platform/UV: Fix panic with missing UVsystab support (bsc#1023866).
- x86/platform/UV: Initialize PCH GPP_D_0 NMI Pin to be NMI source (bsc#1023866).
- x86/platform/UV: Verify NMI action is valid, default is standard (bsc#1023866).
- xen-blkfront: correct maximum segment accounting (bsc#1018263).
- xen-blkfront: do not call talk_to_blkback when already connected to blkback.
- xen/blkfront: Fix crash if backend does not follow the right states.
- xen-blkfront: free resources if xlvbd_alloc_gendisk fails.
- xen/netback: set default upper limit of tx/rx queues to 8 (bnc#1019163).
- xen/netfront: set default upper limit of tx/rx queues to 8 (bnc#1019163).
- xfs: do not take the IOLOCK exclusive for direct I/O page invalidation (bsc#1015609).