diff options
| author | Mikulas Patocka <mpatocka@redhat.com> | 2022-04-03 14:38:22 -0400 |
|---|---|---|
| committer | Mike Snitzer <snitzer@kernel.org> | 2022-04-13 12:38:49 -0400 |
| commit | 08c1af8f1c13bbf210f1760132f4df24d0ed46d6 (patch) | |
| tree | 676b1092df0ba94cb4452b1bdd1caafd7d70dcb0 /include | |
| parent | ce522ba9ef7e2d9fb22a39eb3371c0c64e2a433e (diff) | |
dm integrity: fix memory corruption when tag_size is less than digest size
It is possible to set up dm-integrity in such a way that the
"tag_size" parameter is less than the actual digest size. In this
situation, a part of the digest beyond tag_size is ignored.
In this case, dm-integrity would write beyond the end of the
ic->recalc_tags array and corrupt memory. The corruption happened in
integrity_recalc->integrity_sector_checksum->crypto_shash_final.
Fix this corruption by increasing the tags array so that it has enough
padding at the end to accomodate the loop in integrity_recalc() being
able to write a full digest size for the last member of the tags
array.
Cc: stable@vger.kernel.org # v4.19+
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions