Unbreakable Enterprise kernel security update

[4.1.12-124.26.5]

• scsi: scsi_transport_iscsi: modify detected conn err to KERN_ERR (Fred Herard) [Orabug: 29487790]
• xen/blkfront: avoid NULL blkfront_info dereference on device removal (Vasilis Liaskovitis) [Orabug: 29469740]
  [4.1.12-124.26.4U]
• bnxt_en: Fix race conditions in .ndo_get_stats64(). (Michael Chan) [Orabug: 29129625]
• ext4: always verify the magic number in xattr blocks (Theodore Ts’o) [Orabug: 29437127] {CVE-2018-10879} {CVE-2018-10879}
• ext4: add corruption check in ext4_xattr_set_entry() (Theodore Ts’o) [Orabug: 29437127] {CVE-2018-10879} {CVE-2018-10879}
• net: add netif_is_lag_port helper (Jiri Pirko) [Orabug: 29495360]
• net: add netif_is_lag_master helper (Jiri Pirko) [Orabug: 29495360]
• net: add netif_is_team_port helper (Jiri Pirko) [Orabug: 29495360]
• net: add netif_is_team_master helper (Jiri Pirko) [Orabug: 29495360]