[PATCH] [SRU][Trusty] Fix for CVE-2018-10877

[Paolo Pisati]

CVE-2018-10877

Almost clean cherry pick: i just had to switch the returned error from
EFSCORRUPTED to EIO, since the former is not defined in Trusty.

Theodore Ts'o (1):
  ext4: verify the depth of extent tree in ext4_find_extent()

 fs/ext4/ext4_extents.h | 1 +
 fs/ext4/extents.c      | 6 ++++++
 2 files changed, 7 insertions(+)

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2.7.4