Unbreakable Enterprise kernel security update

[4.1.12-124.59.1.2]

• fix regression in ‘epoll: Keep a reference on files added to the check list’ (Al Viro) [Orabug: 33679854] {CVE-2021-1048}
• fget: check that the fd still exists after getting a ref to it (Linus Torvalds) [Orabug: 33679806] {CVE-2021-0920}
• fs: add fget_many() and fput_many() (Jens Axboe) [Orabug: 33679806]
• af_unix: fix garbage collect vs MSG_PEEK (Miklos Szeredi) [Orabug: 33679806] {CVE-2021-0920}
• net: split out functions related to registering inflight socket files (Jens Axboe) [Orabug: 33679806]
  [4.1.12-124.59.1.1]
• xfs: map unwritten blocks in XFS_IOC_{ALLOC,FREE}SP just like fallocate (Darrick J. Wong) [Orabug: 33703630] {CVE-2021-4155}