Security update for the Linux Kernel

The SUSE Linux Enterprise 11 SP4 kernel was updated to receive various security and bugfixes. The following security bugs were fixed: - CVE-2017-5715: Systems with microprocessors utilizing speculative execution and indirect branch prediction may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis (bnc#1068032). Enhancements and bugfixes over the previous fixes have been added to this kernel. - CVE-2018-10087: The kernel_wait4 function in kernel/exit.c might have allowed local users to cause a denial of service by triggering an attempted use of the -INT_MIN value (bnc#1089608). - CVE-2018-7757: Memory leak in the sas_smp_get_phy_events function in drivers/scsi/libsas/sas_expander.c allowed local users to cause a denial of service (memory consumption) via many read accesses to files in the /sys/class/sas_phy directory, as demonstrated by the /sys/class/sas_phy/phy-1:0:12/invalid_dword_count file (bnc#1084536). - CVE-2018-7566: There was a buffer overflow via an SNDRV_SEQ_IOCTL_SET_CLIENT_POOL ioctl write operation to /dev/snd/seq by a local user (bnc#1083483). - CVE-2017-0861: Use-after-free vulnerability in the snd_pcm_info function in the ALSA subsystem allowed attackers to gain privileges via unspecified vectors (bnc#1088260). - CVE-2018-8822: Incorrect buffer length handling in the ncp_read_kernel function in fs/ncpfs/ncplib_kernel.c could be exploited by malicious NCPFS servers to crash the kernel or execute code (bnc#1086162). - CVE-2017-13166: An elevation of privilege vulnerability in the kernel v4l2 video driver. (bnc#1072865). - CVE-2017-18203: The dm_get_from_kobject function in drivers/md/dm.c allowed local users to cause a denial of service (BUG) by leveraging a race condition with __dm_destroy during creation and removal of DM devices (bnc#1083242). - CVE-2017-16911: The vhci_hcd driver allowed allows local attackers to disclose kernel memory addresses. Successful exploitation requires that a USB device is attached over IP (bnc#1078674). - CVE-2017-18208: The madvise_willneed function in mm/madvise.c local users to cause a denial of service (infinite loop) by triggering use of MADVISE_WILLNEED for a DAX mapping (bnc#1083494). - CVE-2017-16644: The hdpvr_probe function in drivers/media/usb/hdpvr/hdpvr-core.c allowed local users to cause a denial of service (improper error handling and system crash) or possibly have unspecified other impact via a crafted USB device (bnc#1067118). - CVE-2018-6927: The futex_requeue function in kernel/futex.c in the Linux kernel might allow attackers to cause a denial of service (integer overflow) or possibly have unspecified other impact by triggering a negative wake or requeue value (bnc#1080757). - CVE-2017-16914: The 'stub_send_ret_submit()' function (drivers/usb/usbip/stub_tx.c) allowed attackers to cause a denial of service (NULL pointer dereference) via a specially crafted USB over IP packet (bnc#1078669). - CVE-2016-7915: The hid_input_field function in drivers/hid/hid-core.c allowed physically proximate attackers to obtain sensitive information from kernel memory or cause a denial of service (out-of-bounds read) by connecting a device, as demonstrated by a Logitech DJ receiver (bnc#1010470). - CVE-2015-5156: The virtnet_probe function in drivers/net/virtio_net.c attempted to support a FRAGLIST feature without proper memory allocation, which allowed guest OS users to cause a denial of service (buffer overflow and memory corruption) via a crafted sequence of fragmented packets (bnc#940776). - CVE-2017-12190: The bio_map_user_iov and bio_unmap_user functions in block/bio.c did unbalanced refcounting when a SCSI I/O vector has small consecutive buffers belonging to the same page. The bio_add_pc_page function merges them into one, but the page reference is never dropped. This causes a memory leak and possible system lockup (exploitable against the host OS by a guest OS user, if a SCSI disk is passed through to a virtual machine) due to an out-of-memory condition (bnc#1062568). - CVE-2017-16912: The 'get_pipe()' function (drivers/usb/usbip/stub_rx.c) allowed attackers to cause a denial of service (out-of-bounds read) via a specially crafted USB over IP packet (bnc#1078673). - CVE-2017-16913: The 'stub_recv_cmd_submit()' function (drivers/usb/usbip/stub_rx.c) when handling CMD_SUBMIT packets allowed attackers to cause a denial of service (arbitrary memory allocation) via a specially crafted USB over IP packet (bnc#1078672). The following non-security bugs were fixed: - af_iucv: enable control sends in case of SEND_SHUTDOWN (bnc#1085513, LTC#165135). - cifs: fix buffer overflow in cifs_build_path_to_root() (bsc#1085113). - drm/mgag200: fix a test in mga_vga_mode_valid() (bsc#1087092). - hrtimer: Ensure POSIX compliance (relative CLOCK_REALTIME hrtimers) (bnc#1013018). - hrtimer: Reset hrtimer cpu base proper on CPU hotplug (bnc#1013018). - ide-cd: workaround VMware ESXi cdrom emulation bug (bsc#1080813). - ipc/msg: introduce msgctl(MSG_STAT_ANY) (bsc#1072689). - ipc/sem: introduce semctl(SEM_STAT_ANY) (bsc#1072689). - ipc/shm: introduce shmctl(SHM_STAT_ANY) (bsc#1072689). - jffs2: Fix use-after-free bug in jffs2_iget()'s error handling path (git-fixes). - kabi: x86/kaiser: properly align trampoline stack. - keys: do not let add_key() update an uninstantiated key (bnc#1063416). - keys: prevent creating a different user's keyrings (bnc#1065999). - leds: do not overflow sysfs buffer in led_trigger_show (bsc#1080464). - mm/mmap.c: do not blow on PROT_NONE MAP_FIXED holes in the stack (bnc#1039348). - nfsv4: fix getacl head length estimation (git-fixes). - pci: Use function 0 VPD for identical functions, regular VPD for others (bnc#943786 git-fixes). - pipe: actually allow root to exceed the pipe buffer limits (git-fixes). - posix-timers: Protect posix clock array access against speculation (bnc#1081358). - powerpc/pseries: Support firmware disable of RFI flush (bsc#1068032, bsc#1075088). - qeth: repair SBAL elements calculation (bnc#1085513, LTC#165484). - Revert 'USB: cdc-acm: fix broken runtime suspend' (bsc#1067912) - s390/qeth: fix underestimated count of buffer elements (bnc#1082091, LTC#164529). - scsi: sr: workaround VMware ESXi cdrom emulation bug (bsc#1080813). - usbnet: Fix a race between usbnet_stop() and the BH (bsc#1083275). - x86-64: Move the 'user' vsyscall segment out of the data segment (bsc#1082424). - x86/espfix: Fix return stack in do_double_fault() (bsc#1085279). - x86/kaiser: properly align trampoline stack (bsc#1087260). - x86/retpoline: do not perform thunk calls in ring3 vsyscall code (bsc#1085331). - xen/x86/asm/traps: Disable tracing and kprobes in fixup_bad_iret and sync_regs (bsc#909077). - xen/x86/cpu: Check speculation control CPUID bit (bsc#1068032). - xen/x86/cpu: Factor out application of forced CPU caps (bsc#1075994 bsc#1075091). - xen/x86/cpu: Fix bootup crashes by sanitizing the argument of the 'clearcpuid=' command-line option (bsc#1065600). - xen/x86/cpu: Sync CPU feature flags late (bsc#1075994 bsc#1075091). - xen/x86/entry: Use IBRS on entry to kernel space (bsc#1068032). - xen/x86/idle: Toggle IBRS when going idle (bsc#1068032). - xen/x86/kaiser: Move feature detection up (bsc#1068032). - xfs: check for buffer errors before waiting (bsc#1052943). - xfs: fix allocbt cursor leak in xfs_alloc_ag_vextent_near (bsc#1087762). - xfs: really fix the cursor leak in xfs_alloc_ag_vextent_near (bsc#1087762).