tag 3c16c94bee6a8ef34ad60565e84aca92b3902fa2
tagger Todd Kjos <tkjos@google.com> Mon Jan 07 10:44:14 2019 -0800
object 36a41d574739d512b745f230fa07c44d92ee2278

https://source.android.com/security/bulletin/2019-01-01
CVE-2018-10876
CVE-2018-10880
CVE-2018-10882
CVE-2018-13405
CVE-2018-18281
CVE-2018-17182
CVE-2018-10877

commit 36a41d574739d512b745f230fa07c44d92ee2278
author Theodore Ts'o <tytso@mit.edu> Thu Jun 14 12:55:10 2018 -0400
committer Todd Kjos <tkjos@google.com> Fri Jan 04 10:01:33 2019 -0800
tree d56987b216e6b75dfcf76dba500b4d6912c44bfc
parent c579b139bea04041286b57f1db9f7185b00ef018

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

commit bc890a60247171294acc0bd67d211fa4b88d40ba upstream.

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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>