Security update for the Linux Kernel

An update that solves 27 vulnerabilities and has 48 security fixes can now be installed.

Description:

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

The following security bugs were fixed:

• CVE-2015-8970: crypto/algif_skcipher.c in the Linux kernel did not verify that a setkey operation has been performed on an AF_ALG socket before an accept system call is processed, which allowed local users to cause a denial of service (NULL pointer dereference and system crash) via a crafted application that did not supply a key, related to the lrw_crypt function in crypto/lrw.c (bnc#1008374).
• CVE-2017-5551: Clear S_ISGID on tmpfs when setting posix ACLs (bsc#1021258).
• CVE-2016-7097: The filesystem implementation in the Linux kernel preserves the setgid bit during a setxattr call, which allowed local users to gain group privileges by leveraging the existence of a setgid program with restrictions on execute permissions (bnc#995968).
• CVE-2016-10088: The sg implementation in the Linux kernel did not properly restrict write operations in situations where the KERNEL_DS option is set, which allowed local users to read or write to arbitrary kernel memory locations or cause a denial of service (use-after-free) by leveraging access to a /dev/sg device, related to block/bsg.c and drivers/scsi/sg.c. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-9576 (bnc#1017710).
• CVE-2004-0230: TCP, when using a large Window Size, made it easier for remote attackers to guess sequence numbers and cause a denial of service (connection loss) to persistent TCP connections by repeatedly injecting a TCP RST packet, especially in protocols that use long-lived connections, such as BGP (bnc#969340).
• CVE-2016-8632: The tipc_msg_build function in net/tipc/msg.c in the Linux kernel did not validate the relationship between the minimum fragment length and the maximum packet size, which allowed local users to gain privileges or cause a denial of service (heap-based buffer overflow) by leveraging the CAP_NET_ADMIN capability (bnc#1008831).
• CVE-2016-8399: An elevation of privilege vulnerability in the kernel networking subsystem could have enabled a local malicious application to execute arbitrary code within the context of the kernel bnc#1014746).
• CVE-2016-9793: The sock_setsockopt function in net/core/sock.c in the Linux kernel mishandled negative values of sk_sndbuf and sk_rcvbuf, which allowed local users to cause a denial of service (memory corruption and system crash) or possibly have unspecified other impact by leveraging the CAP_NET_ADMIN capability for a crafted setsockopt system call with the (1) SO_SNDBUFFORCE or (2) SO_RCVBUFFORCE option (bnc#1013531).
• CVE-2012-6704: The sock_setsockopt function in net/core/sock.c in the Linux kernel mishandled negative values of sk_sndbuf and sk_rcvbuf, which allowed local users to cause a denial of service (memory corruption and system crash) or possibly have unspecified other impact by leveraging the CAP_NET_ADMIN capability for a crafted setsockopt system call with the (1) SO_SNDBUF or (2) SO_RCVBUF option (bnc#1013542).
• CVE-2016-9756: arch/x86/kvm/emulate.c in the Linux kernel did not properly initialize Code Segment (CS) in certain error cases, which allowed local users to obtain sensitive information from kernel stack memory via a crafted application (bnc#1013038).
• CVE-2016-3841: The IPv6 stack in the Linux kernel mishandled options data, which allowed local users to gain privileges or cause a denial of service (use-after-free and system crash) via a crafted sendmsg system call (bnc#992566).
• CVE-2016-9685: Multiple memory leaks in error paths in fs/xfs/xfs_attr_list.c in the Linux kernel allowed local users to cause a denial of service (memory consumption) via crafted XFS filesystem operations (bnc#1012832).
• CVE-2015-1350: The VFS subsystem in the Linux kernel provided an incomplete set of requirements for setattr operations that underspecifies removing extended privilege attributes, which allowed local users to cause a denial of service (capability stripping) via a failed invocation of a system call, as demonstrated by using chown to remove a capability from the ping or Wireshark dumpcap program (bnc#914939).
• CVE-2015-8962: Double free vulnerability in the sg_common_write function in drivers/scsi/sg.c in the Linux kernel allowed local users to gain privileges or cause a denial of service (memory corruption and system crash) by detaching a device during an SG_IO ioctl call (bnc#1010501).
• CVE-2016-9555: The sctp_sf_ootb function in net/sctp/sm_statefuns.c in the Linux kernel lacked chunk-length checking for the first chunk, which allowed remote attackers to cause a denial of service (out-of-bounds slab access) or possibly have unspecified other impact via crafted SCTP data (bnc#1011685).
• CVE-2016-7910: Use-after-free vulnerability in the disk_seqf_stop function in block/genhd.c in the Linux kernel allowed local users to gain privileges by leveraging the execution of a certain stop operation even if the corresponding start operation had failed (bnc#1010716).
• CVE-2016-7911: Race condition in the get_task_ioprio function in block/ioprio.c in the Linux kernel allowed local users to gain privileges or cause a denial of service (use-after-free) via a crafted ioprio_get system call (bnc#1010711).
• CVE-2015-8964: The tty_set_termios_ldisc function in drivers/tty/tty_ldisc.c in the Linux kernel allowed local users to obtain sensitive information from kernel memory by reading a tty data structure (bnc#1010507).
• CVE-2016-7916: Race condition in the environ_read function in fs/proc/base.c in the Linux kernel allowed local users to obtain sensitive information from kernel memory by reading a /proc/*/environ file during a process-setup time interval in which environment-variable copying is incomplete (bnc#1010467).
• CVE-2016-8646: The hash_accept function in crypto/algif_hash.c in the Linux kernel allowed local users to cause a denial of service (OOPS) by attempting to trigger use of in-kernel hash algorithms for a socket that has received zero bytes of data (bnc#1010150).
• CVE-2016-8633: drivers/firewire/net.c in the Linux kernel in certain unusual hardware configurations allowed remote attackers to execute arbitrary code via crafted fragmented packets (bnc#1008833).
• CVE-2016-7042: The proc_keys_show function in security/keys/proc.c in the Linux, when the GNU Compiler Collection (gcc) stack protector is enabled, used an incorrect buffer size for certain timeout data, which allowed local users to cause a denial of service (stack memory corruption and panic) by reading the /proc/keys file (bnc#1004517).
• CVE-2015-8956: The rfcomm_sock_bind function in net/bluetooth/rfcomm/sock.c in the Linux kernel allowed local users to obtain sensitive information or cause a denial of service (NULL pointer dereference) via vectors involving a bind system call on a Bluetooth RFCOMM socket (bnc#1003925).
• CVE-2016-7117: Use-after-free vulnerability in the __sys_recvmmsg function in net/socket.c in the Linux kernel allowed remote attackers to execute arbitrary code via vectors involving a recvmmsg system call that is mishandled during error processing (bnc#1003077).
• CVE-2016-0823: The pagemap_open function in fs/proc/task_mmu.c in the Linux kernel allowed local users to obtain sensitive physical-address information by reading a pagemap file (bnc#994759).
• CVE-2016-7425: The arcmsr_iop_message_xfer function in drivers/scsi/arcmsr/arcmsr_hba.c in the Linux kernel did not restrict a certain length field, which allowed local users to gain privileges or cause a denial of service (heap-based buffer overflow) via an ARCMSR_MESSAGE_WRITE_WQBUFFER control code (bnc#999932).
• CVE-2016-6828: The tcp_check_send_head function in include/net/tcp.h in the Linux kernel did not properly maintain certain SACK state after a failed data copy, which allowed local users to cause a denial of service (tcp_xmit_retransmit_queue use-after-free and system crash) via a crafted SACK option (bnc#994296).

The following non-security bugs were fixed:

• Always include the git commit in KOTD builds. This allows us not to set it explicitly in builds submitted to the official distribution (bnc#821612, bnc#824171).
• KVM: x86: SYSENTER emulation is broken (bsc#994618).
• NFS: Do not disconnect open-owner on NFS4ERR_BAD_SEQID (bsc#989261).
• NFS: Refresh open-owner id when server says SEQID is bad (bsc#989261).
• NFSv4: Ensure that we do not drop a state owner more than once (bsc#979595).
• NFSv4: add flock_owner to open context (bnc#998689).
• NFSv4: change nfs4_do_setattr to take an open_context instead of a nfs4_state (bnc#998689).
• NFSv4: change nfs4_select_rw_stateid to take a lock_context inplace of lock_owner (bnc#998689).
• NFSv4: enhance nfs4_copy_lock_stateid to use a flock stateid if there is one (bnc#998689).
• NFSv4: fix broken patch relating to v4 read delegations (bsc#956514, bsc#989261, bsc#979595).
• SELinux: Fix possible NULL pointer dereference in selinux_inode_permission() (bsc#1012895).
• USB: fix typo in wMaxPacketSize validation (bsc#991665).
• USB: validate wMaxPacketValue entries in endpoint descriptors (bnc#991665).
• Update patches.xen/xen3-auto-arch-x86.diff (bsc#929141, among others).
• __ptrace_may_access() should not deny sub-threads (bsc#1012851).
• apparmor: fix IRQ stack overflow during free_profile (bsc#1009875).
• arch/powerpc: Remove duplicate/redundant Altivec entries (bsc#967716).
• cdc-acm: added sanity checking for probe() (bsc#993891).
• include/linux/math64.h: add div64_ul() (bsc#996329).
• kabi-fix for flock_owner addition (bsc#998689).
• kabi: get back scsi_device.current_cmnd (bsc#935436).
• kaweth: fix firmware download (bsc#993890).
• kaweth: fix oops upon failed memory allocation (bsc#993890).
• kexec: add a kexec_crash_loaded() function (bsc#973691).
• md linear: fix a race between linear_add() and linear_congested() (bsc#1018446).
• mpi: Fix NULL ptr dereference in mpi_powm() [ver #3] (bsc#1011820).
• mpt3sas: Fix panic when aer correct error occurred (bsc#997708, bsc#999943).
• mremap: enforce rmap src/dst vma ordering in case of vma_merge() succeeding in copy_vma() (VM Functionality, bsc#1008645).
• nfs4: reset states to use open_stateid when returning delegation voluntarily (bsc#1007944).
• ocfs2: fix BUG_ON() in ocfs2_ci_checkpointed() (bnc#1019783).
• posix-timers: Remove remaining uses of tasklist_lock (bnc#997401).
• posix-timers: Use sighand lock instead of tasklist_lock for task clock sample (bnc#997401).
• posix-timers: Use sighand lock instead of tasklist_lock on timer deletion (bnc#997401).
• powerpc: Add ability to build little endian kernels (bsc#967716).
• powerpc: Avoid load of static chain register when calling nested functions through a pointer on 64bit (bsc#967716).
• powerpc: Do not build assembly files with ABIv2 (bsc#967716).
• powerpc: Do not use ELFv2 ABI to build the kernel (bsc#967716).
• powerpc: Fix 64 bit builds with binutils 2.24 (bsc#967716).
• powerpc: Fix error when cross building TAGS and cscope (bsc#967716).
• powerpc: Make the vdso32 also build big-endian (bsc#967716).
• powerpc: Remove altivec fix for gcc versions before 4.0 (bsc#967716).
• powerpc: Remove buggy 9-year-old test for binutils lower than 2.12.1 (bsc#967716).
• powerpc: Require gcc 4.0 on 64-bit (bsc#967716).
• powerpc: dtc is required to build dtb files (bsc#967716).
• printk/sched: Introduce special printk_sched() for those awkward (bsc#1013042, bsc#996541, bsc#1015878).
• qlcnic: Schedule napi directly in netpoll (bsc#966826).
• reiserfs: fix race in prealloc discard (bsc#987576).
• rpm/config.sh: Set a fitting release string (bsc#997059)
• rpm/kernel-binary.spec.in: Export a make-stderr.log file (bsc#1012422)
• rpm/mkspec: Read a default release string from rpm/config.sh (bsc997059)
• s390/dasd: fix failfast for disconnected devices (bnc#961923, LTC#135138).
• sched/core: Fix a race between try_to_wake_up() and a woken up task (bnc#1002165).
• sched/core: Fix an SMP ordering race in try_to_wake_up() vs. schedule() (bnc#1001419).
• sched: Fix possible divide by zero in avg_atom() calculation (bsc#996329).
• scsi