Pull ext4 bugfixes from Ted Ts'o:
 "Bug fixes for ext4; most of which relate to vulnerabilities where a
  maliciously crafted file system image can result in a kernel OOPS or
  hang.

  At least one fix addresses an inline data bug could be triggered by
  userspace without the need of a crafted file system (although it does
  require that the inline data feature be enabled)"

* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: check superblock mapped prior to committing
  ext4: add more mount time checks of the superblock
  ext4: add more inode number paranoia checks
  ext4: avoid running out of journal credits when appending to an inline file
  jbd2: don't mark block as modified if the handle is out of credits
  ext4: never move the system.data xattr out of the inode body
  ext4: clear i_data in ext4_inode_info when removing inline data
  ext4: include the illegal physical block in the bad map ext4_error msg
  ext4: verify the depth of extent tree in ext4_find_extent()
  ext4: only look at the bg_flags field if it is valid
  ext4: make sure bitmaps and the inode table don't overlap with bg descriptors
  ext4: always check block group bounds in ext4_init_block_bitmap()
  ext4: always verify the magic number in xattr blocks
  ext4: add corruption check in ext4_xattr_set_entry()
  ext4: add warn_on_error mount option