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    Subject[PATCH 3/6] mm/kasan, slub: don't disable interrupts when object leaves quarantine
    Date
    SLUB doesn't require disabled interrupts to call ___cache_free().

    Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
    ---
    mm/kasan/quarantine.c | 8 ++++++--
    1 file changed, 6 insertions(+), 2 deletions(-)

    diff --git a/mm/kasan/quarantine.c b/mm/kasan/quarantine.c
    index 65793f1..4852625 100644
    --- a/mm/kasan/quarantine.c
    +++ b/mm/kasan/quarantine.c
    @@ -147,10 +147,14 @@ static void qlink_free(struct qlist_node *qlink, struct kmem_cache *cache)
    struct kasan_alloc_meta *alloc_info = get_alloc_info(cache, object);
    unsigned long flags;

    - local_irq_save(flags);
    + if (IS_ENABLED(CONFIG_SLAB))
    + local_irq_save(flags);
    +
    alloc_info->state = KASAN_STATE_FREE;
    ___cache_free(cache, object, _THIS_IP_);
    - local_irq_restore(flags);
    +
    + if (IS_ENABLED(CONFIG_SLAB))
    + local_irq_restore(flags);
    }

    static void qlist_free_all(struct qlist_head *q, struct kmem_cache *cache)
    --
    2.7.3
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