tree cb1aeb05ac0a8eb30f12d49c68da6f1a65187bc2
parent 8844618d8aa7a9973e7b527d038a2a589665002c
author Theodore Ts'o <tytso@mit.edu> 1528995310 -0400
committer Theodore Ts'o <tytso@mit.edu> 1528995310 -0400

ext4: verify the depth of extent tree in ext4_find_extent()

If there is a corupted file system where the claimed depth of the
extent tree is -1, this can cause a massive buffer overrun leading to
sadness.

This addresses CVE-2018-10877.

https://bugzilla.kernel.org/show_bug.cgi?id=199417

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org