tag 54bb9b31a500e5c05751749c95d55297db560484
tagger The Android Open Source Project <initial-contribution@android.com> Mon Jan 13 14:03:20 2020 -0800
object e4e2c32997da16f1892dd6b5dc210f5ce05e9b0a

Android Wear 9.0.0 Release 10 (PWDR.190618.001.B3)

commit e4e2c32997da16f1892dd6b5dc210f5ce05e9b0a
author Sriram Rajagopalan <sriramr@arista.com> Sun Jun 09 18:39:31 2019 +0200
committer abel_fang <Abel_Fang@compal.com> Wed Oct 30 08:41:43 2019 +0800
tree ce011638a830810a7d3facd12cd1544a2927ae91
parent b361c6b2bd6cc0ccec0e172c467beed49eb5966f

ext4: zero out the unused memory region in the extent tree block

commit 592acbf16821288ecdc4192c47e3774a4c48bb64 upstream.

This commit zeroes out the unused memory region in the buffer_head
corresponding to the extent metablock after writing the extent header
and the corresponding extent node entries.

This is done to prevent random uninitialized data from getting into
the filesystem when the extent block is synced.

This fixes CVE-2019-11833.

Change-Id: I766b59759f08b76e2bcf04630947b68d3b2ec0d8
Signed-off-by: Sriram Rajagopalan <sriramr@arista.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>