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    Subject[PATCH 5.17 770/772] md: fix double free of io_acct_set bioset
    Date
    From: Xiao Ni <xni@redhat.com>

    commit 42b805af102471f53e3c7867b8c2b502ea4eef7e upstream.

    Now io_acct_set is alloc and free in personality. Remove the codes that
    free io_acct_set in md_free and md_stop.

    Fixes: 0c031fd37f69 (md: Move alloc/free acct bioset in to personality)
    Signed-off-by: Xiao Ni <xni@redhat.com>
    Signed-off-by: Song Liu <song@kernel.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/md/md.c | 4 ----
    1 file changed, 4 deletions(-)

    --- a/drivers/md/md.c
    +++ b/drivers/md/md.c
    @@ -5600,8 +5600,6 @@ static void md_free(struct kobject *ko)

    bioset_exit(&mddev->bio_set);
    bioset_exit(&mddev->sync_set);
    - if (mddev->level != 1 && mddev->level != 10)
    - bioset_exit(&mddev->io_acct_set);
    kfree(mddev);
    }

    @@ -6288,8 +6286,6 @@ void md_stop(struct mddev *mddev)
    __md_stop(mddev);
    bioset_exit(&mddev->bio_set);
    bioset_exit(&mddev->sync_set);
    - if (mddev->level != 1 && mddev->level != 10)
    - bioset_exit(&mddev->io_acct_set);
    }

    EXPORT_SYMBOL_GPL(md_stop);

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