The SUSE Linux Enterprise 12 kernel was updated to 3.12.55 to receive various security and bugfixes. Features added: - A improved XEN blkfront module was added, which allows more I/O bandwidth. It is called xen-blkfront in PV, and xen-vbd-upstream in HVM mode. The following security bugs were fixed: - CVE-2013-7446: Use-after-free vulnerability in net/unix/af_unix.c in the Linux kernel allowed local users to bypass intended AF_UNIX socket permissions or cause a denial of service via crafted epoll_ctl calls . - CVE-2015-5707: Integer overflow in the sg_start_req function in drivers/scsi/sg.c in the Linux kernel allowed local users to cause a denial of service or possibly have unspecified other impact via a large iov_count value in a write request . - CVE-2015-8709: kernel/ptrace.c in the Linux kernel mishandled uid and gid mappings, which allowed local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states "there is no kernel bug here" . - CVE-2015-8767: net/sctp/sm_sideeffect.c in the Linux kernel did not properly manage the relationship between a lock and a socket, which allowed local users to cause a denial of service via a crafted sctp_accept call . - CVE-2015-8785: The fuse_fill_write_pages function in fs/fuse/file.c in the Linux kernel allowed local users to cause a denial of service via a writev system call that triggers a zero length for the first segment of an iov . - CVE-2015-8812: A use-after-free flaw was found in the CXGB3 kernel driver when the network was considered to be congested. This could be used by local attackers to cause machine crashes or potentially code executuon . - CVE-2016-0723: Race condition in the tty_ioctl function in drivers/tty/tty_io.c in the Linux kernel allowed local users to obtain sensitive information from kernel memory or cause a denial of service by making a TIOCGETD ioctl call during processing of a TIOCSETD ioctl call . - CVE-2016-0774: A pipe buffer state corruption after unsuccessful atomic read from pipe was fixed . - CVE-2016-2069: Race conditions in TLB syncing was fixed which could leak to information leaks . - CVE-2016-2384: A double-free triggered by invalid USB descriptor in ALSA usb-audio was fixed, which could be exploited by physical local attackers to crash the kernel or gain code execution . The following non-security bugs were fixed: - alsa: rawmidi: Make snd_rawmidi_transmit race-free . - alsa: seq: Fix leak of pool buffer at concurrent writes . - be2net: fix some log messages . - block: xen-blkfront: Fix possible NULL ptr dereference . - btrfs: Add handler for invalidate page . - btrfs: check prepare_uptodate_page error code earlier . - btrfs: delayed_ref: Add new function to record reserved space into delayed ref . - btrfs: delayed_ref: release and free qgroup reserved at proper timing . - btrfs: extent_io: Introduce needed structure for recoding set/clear bits . - btrfs: extent_io: Introduce new function clear_record_extent_bits . - btrfs: extent_io: Introduce new function set_record_extent_bits . - btrfs: extent-tree: Add new version of btrfs_check_data_free_space and btrfs_free_reserved_data_space . - btrfs: extent-tree: Add new version of btrfs_delalloc_reserve/release_space . - btrfs: extent-tree: Switch to new check_data_free_space and free_reserved_data_space . - btrfs: extent-tree: Switch to new delalloc space reserve and release . - btrfs: fallocate: Add support to accurate qgroup reserve . - btrfs: fix deadlock between direct IO write and defrag/readpages . - btrfs: fix invalid page accesses in extent_same ioctl . - btrfs: fix page reading in extent_same ioctl leading to csum errors . - btrfs: fix warning in backref walking . - btrfs: qgroup: Add handler for NOCOW and inline . - btrfs: qgroup: Add new trace point for qgroup data reserve . - btrfs: qgroup: Avoid calling btrfs_free_reserved_data_space in clear_bit_hook . - btrfs: qgroup: Check if qgroup reserved space leaked . - btrfs: qgroup: Cleanup old inaccurate facilities . - btrfs: qgroup: Fix a race in delayed_ref which leads to abort trans . - btrfs: qgroup: Fix a rebase bug which will cause qgroup double free . - btrfs: qgroup: Introduce btrfs_qgroup_reserve_data function . - btrfs: qgroup: Introduce functions to release/free qgroup reserve data space . - btrfs: qgroup: Introduce new functions to reserve/free metadata . - btrfs: qgroup: Use new metadata reservation . - btrfs: skip locking when searching commit root . - dcache: use IS_ROOT to decide where dentry is hashed . - documentation: Document kernel.panic_on_io_nmi sysctl . - documentation: Fix build of PDF files in kernel-docs package Double the spaces for tex, and fix buildrequires for docbook. - doc: Use fop for creating PDF files in kernel-docs package as some files still cannot be built with the default backend. - driver core: Add BUS_NOTIFY_REMOVED_DEVICE event . - drivers: xen-blkfront: only talk_to_blkback when in XenbusStateInitialising . - driver: xen-blkfront: move talk_to_blkback to a more suitable place . - ec2: updated kabi files and start tracking - fs: Improve fairness when locking the per-superblock s_anon list . - fs/proc_namespace.c: simplify testing nsp and nsp->mnt_ns . - fuse: break infinite loop in fuse_fill_write_pages . - futex: Drop refcount if requeue_pi acquired the rtmutex . - jbd2: Fix unreclaimed pages after truncate in data=journal mode . - kabi: Preserve checksum of kvm_x86_ops . - kABI: protect struct af_alg_type. - kABI: protect struct crypto_ahash. - kABI: reintroduce blk_rq_check_limits. - kabi/severities: Fail on changes in kvm_x86_ops, needed by lttng-modules - kernel: Change ASSIGN_ONCE to WRITE_ONCE . - kernel: Provide READ_ONCE and ASSIGN_ONCE . - kernel/watchdog.c: perform all-CPU backtrace in case of hard lockup . - kexec: Fix race between panic and crash_kexec . - kgr: do not print error for !abort_if_missing symbols . - kgr: do not use WQ_MEM_RECLAIM workqueue . - kgr: log when modifying kernel . - kgr: mark some more missed kthreads . - kgr: usb/storage: do not emit thread awakened . - kvm: x86: Check dest_map->vector to match eoi signals for rtc . - kvm: x86: Convert ioapic->rtc_status.dest_map to a struct . - kvm: x86: store IOAPIC-handled vectors in each VCPU . - kvm: x86: Track irq vectors in ioapic->rtc_status.dest_map . - libceph: fix scatterlist last_piece calculation . - megaraid_sas: Chip reset if driver fails to get IOC ready . Refresh the patch based on the actual upstream commit, and add the commit ID. - mm/memory_hotplug.c: check for missing sections in test_pages_in_a_zone . - module: keep percpu symbols in module"s symtab . - namespaces: Re-introduce task_nsproxy helper . - namespaces: Use task_lock and not rcu to protect nsproxy . - net: core: Correct an over-stringent device loop detection . - nfs: Background flush should not be low priority . - nfsd: Do not start lockd when only NFSv4 is running . - nfs: do not use STABLE writes during writeback . - nfs: Fix handling of re-write-before-commit for mmapped NFS pages . - nfs: Move nfsd patch to the right section - nfsv4: Recovery of recalled read delegations is broken . - nmi: provide the option to issue an NMI back trace to every cpu but current . - nmi: provide the option to issue an NMI back trace to every cpu but current . - panic, x86: Allow CPUs to save registers even if looping in NMI context . - panic, x86: Fix re-entrance problem due to panic on NMI . - pci: allow access to VPD attributes with size 0 . - pciback: Check PF instead of VF for PCI_COMMAND_MEMORY. - pciback: Save the number of MSI-X entries to be copied later. - pci: Blacklist vpd access for buggy devices . - pci: Determine actual VPD size on first access . - pci: Update VPD definitions . - perf: Do not modify perf bias performance setting by default at boot . - proc: Fix ptrace-based permission checks for accessing task maps. - rpm/constraints.in: Bump disk space requirements up a bit Require 10GB on s390x, 20GB elsewhere. - rpm/kernel-binary.spec.in: Fix build if no UEFI certs are installed - rpm/kernel-binary.spec.in: Fix kernel-vanilla-devel dependency - rpm/kernel-binary.spec.in: Fix paths in kernel-vanilla-devel . - rpm/kernel-binary.spec.in: Install libopenssl-devel for newer sign-file - rpm/kernel-binary.spec.in: Sync the main and -base package dependencies . - rpm/kernel-binary.spec.in: Use bzip compression to speed up build - rpm/kernel-module-subpackage: Fix obsoleting dropped flavors - rpm/kernel-source.spec.in: Install kernel-macros for kernel-source-vanilla - rpm/kernel-spec-macros: Do not modify the release string in PTFs - rpm/package-descriptions: Add kernel-zfcpdump and drop -desktop - sched/fair: Disable tg load_avg/runnable_avg update for root_task_group . - sched/fair: Move cache hot load_avg/runnable_avg into separate cacheline . - sched: Fix race between task_group and sched_task_group - scsi: Add sd_mod to initrd modules For some reason PowerVM backend can"t work without sd_mod - scsi_dh_alua: Do not block request queue if workqueue is active . - scsi: fix soft lockup in scsi_remove_target on module removal . - scsi: restart list search after unlock in scsi_remove_target . - series.conf: add section comments - supported.conf: Add e1000e to -base - supported.conf: Add Hyper-V modules to -base - supported.conf: Add more QEMU and VMware drivers to -base . - supported.conf: Add more qemu device driver - supported.conf: Add mptspi and mptsas to -base - supported.conf: Add netfilter modules to base - supported.conf: Add nls_iso8859-1 and nls_cp437 to -base - supported.conf: Add the qemu scsi driver to -base - supported.conf: Add tulip to -base for Hyper-V - supported.conf: Add vfat to -base to be able to mount the ESP . - supported.conf: Add virtio_{blk,net,scsi} to kernel-default-base - supported.conf: Add virtio-rng - supported.conf: Add xen-blkfront. - supported.conf: Add xfs to -base - supported.conf: Also add virtio_pci to kernel-default-base . - supported.conf: drop +external from ghash-clmulni-intel It was agreed that it does not make sense to maintain "external" for this specific module. Furthermore it causes problems in rather ordinary VMware environments. - supported.conf: Fix usb-common path usb-common moved to its own subdirectory in kernel v3.16, and we backported that change to SLE12. - tcp: Restore RFC5961-compliant behavior for SYN packets . - usb: Quiet down false peer failure messages . - x86/apic: Introduce apic_extnmi command line parameter . - x86/nmi: Save regs in crash dump on external NMI . - x86/nmi: Save regs in crash dump on external NMI . - xen: Add /etc/modprobe.d/50-xen.conf selecting Xen frontend driver implementation . - xen-blkfront: allow building in our Xen environment . - xen, blkfront: factor out flush-related checks from do_blkif_request . - xen-blkfront: fix accounting of reqs when migrating . - xen/blkfront: Fix crash if backend does not follow the right states . - xen-blkfront: improve aproximation of required grants per request . - xen/blkfront: improve protection against issuing unsupported REQ_FUA . - xen/blkfront: remove redundant flush_op . - xen-blkfront: remove type check from blkfront_setup_discard . - xen-blkfront: Silence pfn maybe-uninitialized warning . - xen: Linux 3.12.52. - xen: Refresh patches.xen/xen3-patch-3.9 . - xen: Refresh patches.xen/xen3-patch-3.9 . - xen-vscsi-large-requests: Fix resource collision for racing request maps and unmaps . - xen: Xen config files updated to enable upstream block frontend. - xfs: add a few more verifier tests . - xfs: fix double free in xlog_recover_commit_trans . - xfs: recovery of XLOG_UNMOUNT_TRANS leaks memory .