[SRU][PATCH 0/1][X/B/C/D/E] Fix for CVE-2019-11833

[Khalid Elmously]

Information leaks can happen when the unused portion of the extent metablock is not cleared before re-use and then the extent metablock is sync'd to disk.

Clean cherry-pick for all arches. Boot-tested on bionic



Sriram Rajagopalan (1):
  ext4: zero out the unused memory region in the extent tree block

 fs/ext4/extents.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

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2.17.1