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The SUSE Linux Enterprise 12 SP2 LTSS kernel was updated to receive various security and bugfixes.
- CVE-2018-10853: A flaw was found in the way the KVM hypervisor emulated instructions such as sgdt/sidt/fxsave/fxrstor. It did not check current privilege(CPL) level while emulating unprivileged instructions. An unprivileged guest user/process could use this flaw to potentially escalate privileges inside guest (bnc#1097104). - CVE-2018-10876: A flaw was found in Linux kernel in the ext4 filesystem code. A use-after-free is possible in ext4_ext_remove_space() function when mounting and operating a crafted ext4 image. (bnc#1099811) - CVE-2018-10877: Linux kernel ext4 filesystem is vulnerable to an out-of-bound access in the ext4_ext_drop_refs() function when operating on a crafted ext4 filesystem image. (bnc#1099846) - CVE-2018-10878: A flaw was found in the Linux kernel's ext4 filesystem. A local user can cause an out-of-bounds write and a denial of service or unspecified other impact is possible by mounting and operating a crafted ext4 filesystem image. (bnc#1099813) - CVE-2018-10879: A flaw was found in the Linux kernel's ext4 filesystem. A local user can cause a use-after-free in ext4_xattr_set_entry function and a denial of service or unspecified other impact may occur by renaming a file in a crafted ext4 filesystem image. (bnc#1099844) - CVE-2018-10880: Linux kernel is vulnerable to a stack-out-of-bounds write in the ext4 filesystem code when mounting and writing to a crafted ext4 image in ext4_update_inline_data(). An attacker could use this to cause a system crash and a denial of service. (bnc#1099845) - CVE-2018-10881: A flaw was found in the Linux kernel's ext4 filesystem. A local user can cause an out-of-bound access in ext4_get_group_info function, a denial of service, and a system crash by mounting and operating on a crafted ext4 filesystem image. (bnc#1099864) - CVE-2018-10882: A flaw was found in the Linux kernel's ext4 filesystem. A local user can cause an out-of-bound write in in fs/jbd2/transaction.c code, a denial of service, and a system crash by unmounting a crafted ext4 filesystem image. (bnc#1099849) - CVE-2018-10883: A flaw was found in the Linux kernel's ext4 filesystem. A local user can cause an out-of-bounds write in jbd2_journal_dirty_metadata(), a denial of service, and a system crash by mounting and operating on a crafted ext4 filesystem image. (bnc#1099863) - CVE-2018-10902: It was found that the raw midi kernel driver did not protect against concurrent access which leads to a double realloc (double free) in snd_rawmidi_input_params() and snd_rawmidi_output_status() which are part of snd_rawmidi_ioctl() handler in rawmidi.c file. A malicious local attacker could possibly use this for privilege escalation (bnc#1105322). - CVE-2018-10938: A crafted network packet sent remotely by an attacker may force the kernel to enter an infinite loop in the cipso_v4_optptr() function in net/ipv4/cipso_ipv4.c leading to a denial-of-service. A certain non-default configuration of LSM (Linux Security Module) and NetLabel should be set up on a system before an attacker could leverage this flaw (bnc#1106016). - CVE-2018-10940: The cdrom_ioctl_media_changed function in drivers/cdrom/cdrom.c allowed local attackers to use a incorrect bounds check in the CDROM driver CDROM_MEDIA_CHANGED ioctl to read out kernel memory (bnc#1092903). - CVE-2018-12896: An Integer Overflow in kernel/time/posix-timers.c in the POSIX timer code is caused by the way the overrun accounting works. Depending on interval and expiry time values, the overrun can be larger than INT_MAX, but the accounting is int based. This basically made the accounting values, which are visible to user space via timer_getoverrun(2) and siginfo::si_overrun, random. For example, a local user can cause a denial of service (signed integer overflow) via crafted mmap, futex, timer_create, and timer_settime system calls (bnc#1099922). - CVE-2018-13093: There is a NULL pointer dereference and panic in lookup_slow() on a NULL inode->i_ops pointer when doing pathwalks on a corrupted xfs image. This occurs because of a lack of proper validation that cached inodes are free during allocation (bnc#1100001). - CVE-2018-13094: An OOPS may occur for a corrupted xfs image after xfs_da_shrink_inode() is called with a NULL bp (bnc#1100000). - CVE-2018-13095: A denial of service (memory corruption and BUG) can occur for a corrupted xfs image upon encountering an inode that is in extent format, but has more extents than fit in the inode fork (bnc#1099999). - CVE-2018-14617: There is a NULL pointer dereference and panic in hfsplus_lookup() in fs/hfsplus/dir.c when opening a file (that is purportedly a hard link) in an hfs+ filesystem that has malformed catalog data, and is mounted read-only without a metadata directory (bnc#1102870). - CVE-2018-14678: The xen_failsafe_callback entry point in arch/x86/entry/entry_64.S did not properly maintain RBX, which allowed local users to cause a denial of service (uninitialized memory usage and system crash). Within Xen, 64-bit x86 PV Linux guest OS users can trigger a guest OS crash or possibly gain privileges (bnc#1102715). - CVE-2018-15572: The spectre_v2_select_mitigation function in arch/x86/kernel/cpu/bugs.c did not always fill RSB upon a context switch, which made it easier for attackers to conduct userspace-userspace spectreRSB attacks (bnc#1102517 bnc#1105296). - CVE-2018-15594: arch/x86/kernel/paravirt.c mishandled certain indirect calls, which made it easier for attackers to conduct Spectre-v2 attacks against paravirtual guests (bnc#1105348). - CVE-2018-16276: Local attackers could use user access read/writes with incorrect bounds checking in the yurex USB driver to crash the kernel or potentially escalate privileges (bnc#1106095). - CVE-2018-16658: An information leak in cdrom_ioctl_drive_status in drivers/cdrom/cdrom.c could be used by local attackers to read kernel memory because a cast from unsigned long to int interferes with bounds checking. This is similar to CVE-2018-10940 (bnc#1107689). - CVE-2018-17182: The vmacache_flush_all function in mm/vmacache.c mishandled sequence number overflows. An attacker can trigger a use-after-free (and possibly gain privileges) via certain thread creation, map, unmap, invalidation, and dereference operations (bnc#1108399). - CVE-2018-6554: Memory leak in the irda_bind function in net/irda/af_irda.c and later in drivers/staging/irda/net/af_irda.c allowed local users to cause a denial of service (memory consumption) by repeatedly binding an AF_IRDA socket (bnc#1106509). - CVE-2018-6555: The irda_setsockopt function in net/irda/af_irda.c and later in drivers/staging/irda/net/af_irda.c allowed local users to cause a denial of service (ias_object use-after-free and system crash) or possibly have unspecified other impact via an AF_IRDA socket (bnc#1106511). - 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-2018-9363: A buffer overflow in bluetooth HID report processing could be used by malicious bluetooth devices to crash the kernel or potentially execute code (bnc#1105292). The following security bugs were fixed: - CVE-2018-7480: The blkcg_init_queue function in block/blk-cgroup.c allowed local users to cause a denial of service (double free) or possibly have unspecified other impact by triggering a creation failure (bnc#1082863).
The following non-security bugs were fixed:
- atm: Preserve value of skb->truesize when accounting to vcc (bsc#1089066). - bcache: avoid unncessary cache prefetch bch_btree_node_get() (bsc#1064232). - bcache: calculate the number of incremental GC nodes according to the total of btree nodes (bsc#1064232). - bcache: display rate debug parameters to 0 when writeback is not running (bsc#1064232). - bcache: do not check return value of debugfs_create_dir() (bsc#1064232). - bcache: finish incremental GC (bsc#1064232). - bcache: fix error setting writeback_rate through sysfs interface (bsc#1064232). - bcache: fix I/O significant decline while backend devices registering (bsc#1064232). - bcache: free heap cache_set->flush_btree in bch_journal_free (bsc#1064232). - bcache: make the pr_err statement used for ENOENT only in sysfs_attatch section (bsc#1064232). - bcache: release dc->writeback_lock properly in bch_writeback_thread() (bsc#1064232). - bcache: set max writeback rate when I/O request is idle (bsc#1064232). - bcache: simplify the calculation of the total amount of flash dirty data (bsc#1064232). - ext4: check for allocation block validity with block group locked (bsc#1104495). - ext4: do not update checksum of new initialized bitmaps (bnc#1012382). - ext4: fix check to prevent initializing reserved inodes (bsc#1104319). - ext4: fix false negatives *and* false positives in ext4_check_descriptors() (bsc#1103445). - ibmvnic: Include missing return code checks in reset function (bnc#1107966). - kABI: protect struct x86_emulate_ops (kabi). - kabi/severities: Ignore missing cpu_tss_tramp (bsc#1099597) - kabi: x86/speculation/l1tf: Increase l1tf memory limit for Nehalem+ (bnc#1105536). - kvm: MMU: always terminate page walks at level 1 (bsc#1062604). - kvm: MMU: simplify last_pte_bitmap (bsc#1062604). - kvm: nVMX: update last_nonleaf_level when initializing nested EPT (bsc#1062604). - kvm: VMX: fixes for vmentry_l1d_flush module parameter (bsc#1106369). - kvm: VMX: Work around kABI breakage in 'enum vmx_l1d_flush_state' (bsc#1106369). - net: add skb_condense() helper (bsc#1089066). - net: adjust skb->truesize in pskb_expand_head() (bsc#1089066). - net: adjust skb->truesize in ___pskb_trim() (bsc#1089066). - net: ena: Eliminate duplicate barriers on weakly-ordered archs (bsc#1108239). - net: ena: fix device destruction to gracefully free resources (bsc#1108239). - net: ena: fix driver when PAGE_SIZE == 64kB (bsc#1108239). - net: ena: fix incorrect usage of memory barriers (bsc#1108239). - net: ena: fix missing calls to READ_ONCE (bsc#1108239). - net: ena: fix missing lock during device destruction (bsc#1108239). - net: ena: fix potential double ena_destroy_device() (bsc#1108239). - net: ena: fix surprise unplug NULL dereference kernel crash (bsc#1108239). - net: ena: Fix use of uninitialized DMA address bits field (bsc#1108239). - netfilter: xt_CT: fix refcnt leak on error path (bnc#1012382 bsc#1100152). - netlink: do not enter direct reclaim from netlink_trim() (bsc#1042286). - nfs: Use an appropriate work queue for direct-write completion (bsc#1082519). - ovl: fix random return value on mount (bsc#1099993). - ovl: fix uid/gid when creating over whiteout (bsc#1099993). - ovl: modify ovl_permission() to do checks on two inodes (bsc#1106512). - ovl: override creds with the ones from the superblock mounter (bsc#1099993). - powerpc: Avoid code patching freed init sections (bnc#1107735). - powerpc/livepatch: Fix livepatch stack access (bsc#1094466). - powerpc/modules: Do not try to restore r2 after a sibling call (bsc#1094466). - powerpc/tm: Avoid possible userspace r1 corruption on reclaim (bsc#1109333). - powerpc/tm: Fix userspace r13 corruption (bsc#1109333). - provide special timeout module parameters for EC2 (bsc#1065364). - stop_machine: Atomically queue and wake stopper threads (git-fixes). - stop_machine, sched: Fix migrate_swap() vs. active_balance() deadlock (bsc#1088810). - usbip: vhci_sysfs: fix potential Spectre v1 (bsc#1096547). - x86/entry/64: Remove %ebx handling from error_entry/exit (bnc#1102715). - x86/speculation/l1tf: Fix off-by-one error when warning that system has too much RAM (bnc#1105536). - x86/speculation/l1tf: Increase l1tf memory limit for Nehalem+ (bnc#1105536). - x86/speculation/l1tf: Suggest what to do on systems with too much RAM (bnc#1105536). - x86/speculation: Use ARCH_CAPABILITIES to skip L1D flush on vmentry (bsc#1106369). - x86: Drop kernel trampoline stack. It is involved in breaking kdump/kexec infrastucture. (bsc#1099597) - xen: avoid crash in disable_hotplug_cpu (bsc#1106594). - xen/blkback: do not keep persistent grants too long (bsc#1085042). - xen/blkback: move persistent grants flags to bool (bsc#1085042). - xen/blkfront: cleanup stale persistent grants (bsc#1085042). - xen/blkfront: reorder tests in xlblk_init() (bsc#1085042). - xfs: add a new xfs_iext_lookup_extent_before helper (bsc#1095344). - xfs: add asserts for the mmap lock in xfs_{insert,collapse}_file_space (bsc#1095344). - xfs: add a xfs_bmap_fork_to_state helper (bsc#1095344). - xfs: add a xfs_iext_update_extent helper (bsc#1095344). - xfs: add comments documenting the rebalance algorithm (bsc#1095344). - xfs: add some comments to xfs_iext_insert/xfs_iext_insert_node (bsc#1095344). - xfs: add xfs_trim_extent (bsc#1095344). - xfs: allow unaligned extent records in xfs_bmbt_disk_set_all (bsc#1095344). - xfs: borrow indirect blocks from freed extent when available (bsc#1095344). - xfs: cleanup xfs_bmap_last_before (bsc#1095344). - xfs: do not create overlapping extents in xfs_bmap_add_extent_delay_real (bsc#1095344). - xfs: do not rely on extent indices in xfs_bmap_collapse_extents (bsc#1095344). - xfs: do not rely on extent indices in xfs_bmap_insert_extents (bsc#1095344). - xfs: do not set XFS_BTCUR_BPRV_WASDEL in xfs_bunmapi (bsc#1095344). - xfs: during btree split, save new block key & ptr for future insertion (bsc#1095344). - xfs: factor out a helper to initialize a local format inode fork (bsc#1095344). - xfs: fix memory leak in xfs_iext_free_last_leaf (bsc#1095344). - xfs: fix number of records handling in xfs_iext_split_leaf (bsc#1095344). - xfs: handle indlen shortage on delalloc extent merge (bsc#1095344). - xfs: handle zero entries case in xfs_iext_rebalance_leaf (bsc#1095344). - xfs: improve kmem_realloc (bsc#1095344). - xfs: inline xfs_shift_file_space into callers (bsc#1095344). - xfs: introduce the xfs_iext_cursor abstraction (bsc#1095344). - xfs: iterate over extents in xfs_bmap_extents_to_btree (bsc#1095344). - xfs: iterate over extents in xfs_iextents_copy (bsc#1095344). - xfs: make better use of the 'state' variable in xfs_bmap_del_extent_real (bsc#1095344). - xfs: merge xfs_bmap_read_extents into xfs_iread_extents (bsc#1095344). - xfs: move pre/post-bmap tracing into xfs_iext_update_extent (bsc#1095344). - xfs: move some code around inside xfs_bmap_shift_extents (bsc#1095344). - xfs: move some more code into xfs_bmap_del_extent_real (bsc#1095344). - xfs: move xfs_bmbt_irec and xfs_exntst_t to xfs_types.h (bsc#1095344). - xfs: move xfs_iext_insert tracepoint to report useful information (bsc#1095344). - xfs: new inode extent list lookup helpers (bsc#1095344). - xfs: pass an on-disk extent to xfs_bmbt_validate_extent (bsc#1095344). - xfs: pass a struct xfs_bmbt_irec to xfs_bmbt_lookup_eq (bsc#1095344). - xfs: pass a struct xfs_bmbt_irec to xfs_bmbt_update (bsc#1095344). - xfs: pass struct xfs_bmbt_irec to xfs_bmbt_validate_extent (bsc#1095344). - xfs: provide helper for counting extents from if_bytes (bsc#1095344). - xfs: refactor delalloc accounting in xfs_bmap_add_extent_delay_real (bsc#1095344). - xfs: refactor delalloc indlen reservation split into helper (bsc#1095344). - xfs: refactor dir2 leaf readahead shadow buffer cleverness (bsc#1095344). - xfs: refactor xfs_bmap_add_extent_delay_real (bsc#1095344). - xfs: refactor xfs_bmap_add_extent_hole_delay (bsc#1095344). - xfs: refactor xfs_bmap_add_extent_hole_real (bsc#1095344). - xfs: refactor xfs_bmap_add_extent_unwritten_real (bsc#1095344). - xfs: refactor xfs_bunmapi_cow (bsc#1095344). - xfs: refactor xfs_del_extent_real (bsc#1095344). - xfs: remove a duplicate assignment in xfs_bmap_add_extent_delay_real (bsc#1095344). - xfs: remove all xfs_bmbt_set_* helpers except for xfs_bmbt_set_all (bsc#1095344). - xfs: remove a superflous assignment in xfs_iext_remove_node (bsc#1095344). - xfs: Remove dead code from inode recover function (bsc#1105396). - xfs: remove if_rdev (bsc#1095344). - xfs: remove prev argument to xfs_bmapi_reserve_delalloc (bsc#1095344). - xfs: remove support for inlining data/extents into the inode fork (bsc#1095344). - xfs: remove the never fully implemented UUID fork format (bsc#1095344). - xfs: remove the nr_extents argument to xfs_iext_insert (bsc#1095344). - xfs: remove the nr_extents argument to xfs_iext_remove (bsc#1095344). - xfs: remove XFS_BMAP_MAX_SHIFT_EXTENTS (bsc#1095344). - xfs: remove XFS_BMAP_TRACE_EXLIST (bsc#1095344). - xfs: remove xfs_bmbt_get_state (bsc#1095344). - xfs: remove xfs_bmse_shift_one (bsc#1095344). - xfs: rename bno to end in __xfs_bunmapi (bsc#1095344). - xfs: repair malformed inode items during log recovery (bsc#1105396). - xfs: replace xfs_bmbt_lookup_ge with xfs_bmbt_lookup_first (bsc#1095344). - xfs: replace xfs_qm_get_rtblks with a direct call to xfs_bmap_count_leaves (bsc#1095344). - xfs: rewrite getbmap using the xfs_iext_* helpers (bsc#1095344). - xfs: rewrite xfs_bmap_count_leaves using xfs_iext_get_extent (bsc#1095344). - xfs: rewrite xfs_bmap_first_unused to make better use of xfs_iext_get_extent (bsc#1095344). - xfs: simplify the xfs_getbmap interface (bsc#1095344). - xfs: simplify validation of the unwritten extent bit (bsc#1095344). - xfs: split indlen reservations fairly when under reserved (bsc#1095344). - xfs: split xfs_bmap_shift_extents (bsc#1095344). - xfs: switch xfs_bmap_local_to_extents to use xfs_iext_insert (bsc#1095344). - xfs: treat idx as a cursor in xfs_bmap_add_extent_delay_real (bsc#1095344). - xfs: treat idx as a cursor in xfs_bmap_add_extent_hole_delay (bsc#1095344). - xfs: treat idx as a cursor in xfs_bmap_add_extent_hole_real (bsc#1095344). - xfs: treat idx as a cursor in xfs_bmap_add_extent_unwritten_real (bsc#1095344). - xfs: treat idx as a cursor in xfs_bmap_collapse_extents (bsc#1095344). - xfs: treat idx as a cursor in xfs_bmap_del_extent_* (bsc#1095344). - xfs: update freeblocks counter after extent deletion (bsc#1095344). - xfs: update got in xfs_bmap_shift_update_extent (bsc#1095344). - xfs: use a b+tree for the in-core extent list (bsc#1095344). - xfs: use correct state defines in xfs_bmap_del_extent_{cow,delay} (bsc#1095344). - xfs: use new extent lookup helpers in xfs_bmapi_read (bsc#1095344). - xfs: use new extent lookup helpers in xfs_bmapi_write (bsc#1095344). - xfs: use new extent lookup helpers in __xfs_bunmapi (bsc#1095344). - xfs: use the state defines in xfs_bmap_del_extent_real (bsc#1095344). - xfs: use xfs_bmap_del_extent_delay for the data fork as well (bsc#1095344). - xfs: use xfs_iext_*_extent helpers in xfs_bmap_shift_extents (bsc#1095344). - xfs: use xfs_iext_*_extent helpers in xfs_bmap_split_extent_at (bsc#1095344). - xfs: use xfs_iext_get_extent instead of open coding it (bsc#1095344). - xfs: use xfs_iext_get_extent in xfs_bmap_first_unused (bsc#1095344).
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