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| author | Mikulas Patocka <mpatocka@redhat.com> | 2022-04-03 21:38:22 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-20 10:34:20 +0300 |
| commit | 6b4bf97587ef6c1927a78934b700204920655123 (patch) | |
| tree | 3e090aa04edc4f5d400919a185d3d843b9cbf91f /tools/perf/scripts/python | |
| parent | 0940795c6834fbe7705acc5c3d4b2f7a5f67527a (diff) | |
| download | linux-6b4bf97587ef6c1927a78934b700204920655123.tar.xz | |
dm integrity: fix memory corruption when tag_size is less than digest size
commit 08c1af8f1c13bbf210f1760132f4df24d0ed46d6 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions