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| author | Sriram Rajagopalan <sriramr@arista.com> | 2019-06-18 04:48:25 +0200 |
|---|---|---|
| committer | Moyster <oysterized@gmail.com> | 2019-07-18 20:53:52 +0200 |
| commit | 407c65e83249eca541964df9f84f0cd800f91f0e (patch) | |
| tree | 62b647c9a09b7be2da781f1fce2703c57890f7f1 /include/linux/pti.h | |
| parent | da6767e62517b81bd741aff95ed9cae279449e9f (diff) | |
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.
Signed-off-by: Sriram Rajagopalan <sriramr@arista.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Change-Id: I5d74c1731ed4806c8ddc748c08f4d325eedb5317
Diffstat (limited to 'include/linux/pti.h')
0 files changed, 0 insertions, 0 deletions