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    Subject[PATCH 5.4 267/389] dm raid: fix address sanitizer warning in raid_resume
    Date
    From: Mikulas Patocka <mpatocka@redhat.com>

    commit 7dad24db59d2d2803576f2e3645728866a056dab upstream.

    There is a KASAN warning in raid_resume when running the lvm test
    lvconvert-raid.sh. The reason for the warning is that mddev->raid_disks
    is greater than rs->raid_disks, so the loop touches one entry beyond
    the allocated length.

    Cc: stable@vger.kernel.org
    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>
    ---
    drivers/md/dm-raid.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/drivers/md/dm-raid.c
    +++ b/drivers/md/dm-raid.c
    @@ -3808,7 +3808,7 @@ static void attempt_restore_of_faulty_de

    memset(cleared_failed_devices, 0, sizeof(cleared_failed_devices));

    - for (i = 0; i < mddev->raid_disks; i++) {
    + for (i = 0; i < rs->raid_disks; i++) {
    r = &rs->dev[i].rdev;
    /* HM FIXME: enhance journal device recovery processing */
    if (test_bit(Journal, &r->flags))

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