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    Subject[PATCH 5.4 14/86] dm integrity: fix a crash if "recalculate" used without "internal_hash"
    Date
    From: Mikulas Patocka <mpatocka@redhat.com>

    commit 2d06dfecb132a1cc2e374a44eae83b5c4356b8b4 upstream.

    Recalculate can only be specified with internal_hash.

    Cc: stable@vger.kernel.org # v4.19+
    Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
    Signed-off-by: Mike Snitzer <snitzer@redhat.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/md/dm-integrity.c | 6 ++++++
    1 file changed, 6 insertions(+)

    --- a/drivers/md/dm-integrity.c
    +++ b/drivers/md/dm-integrity.c
    @@ -4059,6 +4059,12 @@ try_smaller_buffer:
    r = -ENOMEM;
    goto bad;
    }
    + } else {
    + if (ic->sb->flags & cpu_to_le32(SB_FLAG_RECALCULATING)) {
    + ti->error = "Recalculate can only be specified with internal_hash";
    + r = -EINVAL;
    + goto bad;
    + }
    }

    ic->bufio = dm_bufio_client_create(ic->meta_dev ? ic->meta_dev->bdev : ic->dev->bdev,

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