Security update for the Linux Kernel (important)

The SUSE Linux Enterprise 11 SP3 kernel was updated to receive various
security and bugfixes.

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 (panic) via crafted epoll_ctl
  calls (bnc#955654).
• CVE-2015-7509: fs/ext4/namei.c in the Linux kernel allowed physically
  proximate attackers to cause a denial of service (system crash) via a
  crafted no-journal filesystem, a related issue to CVE-2013-2015
  (bnc#956707).
• CVE-2015-7515: An out of bounds memory access in the aiptek USB driver
  could be used by physical local attackers to crash the kernel
  (bnc#956708).
• CVE-2015-7550: The keyctl_read_key function in security/keys/keyctl.c in
  the Linux kernel did not properly use a semaphore, which allowed local
  users to cause a denial of service (NULL pointer dereference and system
  crash) or possibly have unspecified other impact via a crafted
  application that leverages a race condition between keyctl_revoke and
  keyctl_read calls (bnc#958951).
• CVE-2015-7566: A malicious USB device could cause kernel crashes in the
  visor device driver (bnc#961512).
• CVE-2015-7799: The slhc_init function in drivers/net/slip/slhc.c in the
  Linux kernel did not ensure that certain slot numbers are valid, which
  allowed local users to cause a denial of service (NULL pointer
  dereference and system crash) via a crafted PPPIOCSMAXCID ioctl call
  (bnc#949936).
• CVE-2015-8215: net/ipv6/addrconf.c in the IPv6 stack in the Linux kernel
  did not validate attempted changes to the MTU value, which allowed
  context-dependent attackers to cause a denial of service (packet loss)
  via a value that is (1) smaller than the minimum compliant value or (2)
  larger than the MTU of an interface, as demonstrated by a Router
  Advertisement (RA) message that is not validated by a daemon, a
  different vulnerability than CVE-2015-0272. NOTE: the scope of
  CVE-2015-0272 is limited to the NetworkManager product (bnc#955354).
• CVE-2015-8539: The KEYS subsystem in the Linux kernel allowed local
  users to gain privileges or cause a denial of service (BUG) via crafted
  keyctl commands that negatively instantiate a key, related to
  security/keys/encrypted-keys/encrypted.c, security/keys/trusted.c, and
  security/keys/user_defined.c (bnc#958463).
• CVE-2015-8543: The networking implementation in the Linux kernel did not
  validate protocol identifiers for certain protocol families, which
  allowed local users to cause a denial of service (NULL function pointer
  dereference and system crash) or possibly gain privileges by leveraging
  CLONE_NEWUSER support to execute a crafted SOCK_RAW application
  (bnc#958886).
• CVE-2015-8550: Optimizations introduced by the compiler could have lead
  to double fetch vulnerabilities, potentially possibly leading to
  arbitrary code execution in backend (bsc#957988). (bsc#957988 XSA-155).
• CVE-2015-8551: The PCI backend driver in Xen, when running on an x86
  system and using Linux as the driver domain, allowed local guest
  administrators to hit BUG conditions and cause a denial of service (NULL
  pointer dereference and host OS crash) by leveraging a system with
  access to a passed-through MSI or MSI-X capable physical PCI device and
  a crafted sequence of XEN_PCI_OP_* operations, aka "Linux pciback
  missing sanity checks (bnc#957990).
• CVE-2015-8552: The PCI backend driver in Xen, when running on an x86
  system and using Linux as the driver domain, allowed local guest
  administrators to generate a continuous stream of WARN messages and
  cause a denial of service (disk consumption) by leveraging a system with
  access to a passed-through MSI or MSI-X capable physical PCI device and
  XEN_PCI_OP_enable_msi operations, aka "Linux pciback missing sanity
  checks (bnc#957990).
• CVE-2015-8569: The (1) pptp_bind and (2) pptp_connect functions in
  drivers/net/ppp/pptp.c in the Linux kernel do not verify an address
  length, which allowed local users to obtain sensitive information from
  kernel memory and bypass the KASLR protection mechanism via a crafted
  application (bnc#959190).
• CVE-2015-8575: The sco_sock_bind function in net/bluetooth/sco.c in the
  Linux kernel did not verify an address length, which allowed local users
  to obtain sensitive information from kernel memory and bypass the KASLR
  protection mechanism via a crafted application (bnc#959399).
• 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 (deadlock) via a
  crafted sctp_accept call (bnc#961509).
• 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
  (infinite loop) via a writev system call that triggers a zero length for
  the first segment of an iov (bnc#963765).
• CVE-2015-8812: A flaw was found in the CXGB3 kernel driver when the
  network was considered congested. The kernel would incorrectly
  misinterpret the congestion as an error condition and incorrectly
  free/clean up the skb. When the device would then send the skb’s queued,
  these structures would be referenced and may panic the system
  or allow an attacker to escalate privileges in a use-after-free
  scenario.(bsc#966437).
• CVE-2015-8816: A malicious USB device could cause kernel crashes in the
  in hub_activate() function (bnc#968010).
• 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
  (use-after-free and system crash) by making a TIOCGETD ioctl call during
  processing of a TIOCSETD ioctl call (bnc#961500).
• CVE-2016-2069: A race in invalidating paging structures that were not in
  use locally could have lead to disclosoure of information or arbitrary
  code exectution (bnc#963767).
• CVE-2016-2143: On zSeries a fork of a large process could have caused
  memory corruption due to incorrect page table handling. (bnc#970504,
  LTC#138810).
• CVE-2016-2184: A malicious USB device could cause kernel crashes in the
  alsa usb-audio device driver (bsc#971125).
• CVE-2016-2185: A malicious USB device could cause kernel crashes in the
  usb_driver_claim_interface function (bnc#971124).
• CVE-2016-2186: A malicious USB device could cause kernel crashes in the
  powermate device driver (bnc#970958).
• CVE-2016-2384: A double free on the ALSA umidi object was fixed.
  (bsc#966693).
• CVE-2016-2543: A missing NULL check at remove_events ioctl in the ALSA
  seq driver was fixed. (bsc#967972).
• CVE-2016-2544: Fix race at timer setup and close in the ALSA seq driver
  was fixed. (bsc#967973).
• CVE-2016-2545: A double unlink of active_list in the ALSA timer driver
  was fixed. (bsc#967974).
• CVE-2016-2546: A race among ALSA timer ioctls was fixed (bsc#967975).
• CVE-2016-2547,CVE-2016-2548: The ALSA slave timer list handling was
  hardened against hangs and races.
  (CVE-2016-2547,CVE-2016-2548,bsc#968011,bsc#968012).
• CVE-2016-2549: A stall in ALSA hrtimer handling was fixed (bsc#968013).
• CVE-2016-2782: A malicious USB device could cause kernel crashes in the
  visor device driver (bnc#968670).
• CVE-2016-3137: A malicious USB device could cause kernel crashes in the
  cypress_m8 device driver (bnc#970970).
• CVE-2016-3139: A malicious USB device could cause kernel crashes in the
  wacom device driver (bnc#970909).
• CVE-2016-3140: A malicious USB device could cause kernel crashes in the
  digi_acceleport device driver (bnc#970892).
• CVE-2016-3156: A quadratic algorithm could lead to long kernel ipv4
  hangs when removing a device with a large number of addresses.
  (bsc#971360).
• CVE-2016-3955: A remote buffer overflow in the usbip driver could be
  used by authenticated attackers to crash the kernel. (bsc#975945)
• CVE-2016-2847: A local user could exhaust kernel memory by pushing lots
  of data into pipes. (bsc#970948).
• CVE-2016-2188: A malicious USB device could cause kernel crashes in the
  iowarrior device driver (bnc#970956).
• CVE-2016-3138: A malicious USB device could cause kernel crashes in the
  cdc-acm device driver (bnc#970911).

The following non-security bugs were fixed:

• af_unix: Guard against other == sk in unix_dgram_sendmsg (bsc#973570).
• blktap: also call blkif_disconnect() when frontend switched to closed
  (bsc#952976).
• blktap: refine mm tracking (bsc#952976).
• cachefiles: Avoid deadlocks with fs freezing (bsc#935123).
• cifs: Schedule on hard mount retry (bsc#941514).
• cpuset: Fix potential deadlock w/ set_mems_allowed (bsc#960857,
  bsc#974646).
• dcache: use IS_ROOT to decide where dentry is hashed (bsc#949752).
• driver: Vmxnet3: Fix ethtool -S to return correct rx queue stats
  (bsc#950750).
• drm/i915: Change semantics of hw_contexts_disabled (bsc#963276).
• drm/i915: Evict CS TLBs between batches (bsc#758040).
• drm/i915: Fix SRC_COPY width on 830/845g (bsc#758040).
• e1000e: Do not read ICR in Other interrupt (bsc#924919).
• e1000e: Do not write lsc to ics in msi-x mode (bsc#924919).
• e1000e: Fix msi-x interrupt automask (bsc#924919).
• e1000e: Remove unreachable code (bsc#924919).
• ext3: fix data=journal fast mount/umount hang (bsc#942082).
• ext3: NULL dereference in ext3_evict_inode() (bsc#942082).
• firmware: Create directories for external firmware (bsc#959312).
• firmware: Simplify directory creation (bsc#959312).
• fs: Avoid deadlocks of fsync_bdev() and fs freezing (bsc#935123).
• fs: Fix deadlocks between sync and fs freezing (bsc#935123).
• ftdi_sio: private backport of TIOCMIWAIT (bnc#956375).
• ipr: Fix incorrect trace indexing (bsc#940913).
• ipr: Fix invalid array indexing for HRRQ (bsc#940913).
• ipv6: make fib6 serial number per namespace (bsc#965319).
• ipv6: mld: fix add_grhead skb_over_panic for devs with large MTUs
  (bsc#956852).
• ipv6: per netns fib6 walkers (bsc#965319).
• ipv6: per netns FIB garbage collection (bsc#965319).
• ipv6: replace global gc_args with local variable (bsc#965319).
• jbd: Fix unreclaimed pages after truncate in data=journal mode
  (bsc#961516).
• kabi: protect struct netns_ipv6 after FIB6 GC series (bsc#965319).
• kbuild: create directory for dir/file.o (bsc#959312).
• kexec: Fix race between panic() and crash_kexec() called directly
  (bnc#937444).
• lpfc: Fix null ndlp dereference in target_reset_handler (bsc#951392).
• mld, igmp: Fix reserved tailroom calculation (bsc#956852).
• mm-memcg-print-statistics-from-live-counters-fix (bnc#969307).
• netfilter: xt_recent: fix namespace destroy path (bsc#879378).
• nfs4: treat lock owners as opaque values (bnc#968141).
• nfs: Fix handling of re-write-before-commit for mmapped NFS pages
  (bsc#964201).
• nfs: use smaller allocations for ‘struct id_map’ (bsc#965923).
• nfsv4: Fix two infinite loops in the mount code (bsc#954628).
• nfsv4: Recovery of recalled read delegations is broken (bsc#956514).
• panic/x86: Allow cpus to save registers even if they (bnc#940946).
• panic/x86: Fix re-entrance problem due to panic on (bnc#937444).
• pciback: do not allow MSI-X ops if PCI_COMMAND_MEMORY is not set.
• pciback: for XEN_PCI_OP_disable_msi[|x] only disable if device has
  MSI(X) enabled.
• pciback: return error on XEN_PCI_OP_enable_msi when device has MSI or
  MSI-X enabled.
• pciback: return error on XEN_PCI_OP_enable_msix when device has MSI or
  MSI-X enabled.
• pci: Update VPD size with correct length (bsc#958906).
• quota: Fix deadlock with suspend and quotas (bsc#935123).
• rdma/ucma: Fix AB-BA deadlock (bsc#963998).
• README.BRANCH: Switch to LTSS mode
• Refresh patches.xen/xen3-08-x86-ldt-make-modify_ldt-synchronous.patch
  (bsc#959705).
• Restore kabi after lock-owner change (bnc#968141).
• s390/pageattr: Do a single TLB flush for change_page_attr (bsc#940413).
• scsi_dh_rdac: always retry MODE SELECT on command lock violation
  (bsc#956949).
• scsi: mpt2sas: Rearrange the the code so that the completion queues are
  initialized prior to sending the request to controller firmware
  (bsc#967863).
• skb: Add inline helper for getting the skb end offset from head
  (bsc#956852).
• sunrcp: restore fair scheduling to priority queues (bsc#955308).
• sunrpc: refactor rpcauth_checkverf error returns (bsc#955673).
• tcp: avoid order-1 allocations on wifi and tx path (bsc#956852).
• tcp: fix skb_availroom() (bsc#956852).
• tg3: 5715 does not link up when autoneg off (bsc#904035).
• Update
  patches.fixes/mm-exclude-reserved-pages-from-dirtyable-memory-fix.patch
  (bnc#940017, bnc#949298, bnc#947128).
• usb: ftdi_sio: fix race condition in TIOCMIWAIT, and abort of TIOCMIWAIT
  when the device is removed (bnc#956375).
• usb: ftdi_sio: fix status line change handling for TIOCMIWAIT and
  TIOCGICOUNT (bnc#956375).
• usb: ftdi_sio: fix tiocmget and tiocmset return values (bnc#956375).
• usb: ftdi_sio: fix tiocmget indentation (bnc#956375).
• usb: ftdi_sio: optimise chars_in_buffer (bnc#956375).
• usb: ftdi_sio: refactor modem-control status retrieval (bnc#956375).
• usb: ftdi_sio: remove unnecessary memset (bnc#956375).
• usb: ftdi_sio: use ftdi_get_modem_status in chars_in_buffer (bnc#956375).
• usb: ftdi_sio: use generic chars_in_buffer (bnc#956375).
• usb: serial: export usb_serial_generic_chars_in_buffer (bnc#956375).
• usb: serial: ftdi_sio: Add missing chars_in_buffer function (bnc#956375).
• usbvision fix overflow of interfaces array (bnc#950998).
• veth: extend device features (bsc#879381).
• vfs: Provide function to get superblock and wait for it to thaw
  (bsc#935123).
• vmxnet3: adjust ring sizes when interface is down (bsc#950750).
• vmxnet3: fix building without CONFIG_PCI_MSI (bsc#958912).
• vmxnet3: fix ethtool ring buffer size setting (bsc#950750).
• vmxnet3: fix netpoll race condition (bsc#958912).
• writeback: Skip writeback for frozen filesystem (bsc#935123).
• x86/evtchn: make use of PHYSDEVOP_map_pirq.
• x86, kvm: fix kvm’s usage of kernel_fpu_begin/end() (bsc#961518).
• x86, kvm: fix maintenance of guest/host xcr0 state (bsc#961518).
• x86, kvm: use kernel_fpu_begin/end() in kvm_load/put_guest_fpu()
  (bsc#961518).
• x86/mce: Fix return value of mce_chrdev_read() when erst is disabled
  (bsc#934787).
• xen/panic/x86: Allow cpus to save registers even if they (bnc#940946).
• xen/panic/x86: Fix re-entrance problem due to panic on (bnc#937444).
• xen: x86: mm: drop TLB flush from ptep_set_access_flags (bsc#948330).
• xen: x86: mm: only do a local tlb flush in ptep_set_access_flags()
  (bsc#948330).
• xfrm: do not segment UFO packets (bsc#946122).
• xhci: silence TD warning (bnc#939955).