[PATCH v5 13/17] crash: Assert device_hotplug_lock in crash_get_memory_ranges_nolock()

sashiko-bot at kernel.org sashiko-bot at kernel.org
Fri Sep 18 03:26:43 PDT 2026


> crash_get_memory_ranges_nolock() walks memblock, which memory hotplug
> modifies under device_hotplug_lock.  A caller that does not hold the lock
> can race with memblock_double_array() and iterate a freed regions array.
> 
> Add device_hotplug_lock_assert_held() and call it at the top of the
> function so that such callers are caught by lockdep.
> 
> Signed-off-by: Jinjie Ruan <ruanjinjie at huawei.com>

Sashiko has reviewed this patch and found no issues. It looks great!

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260918100442.3841135-1-ruanjinjie@huawei.com?part=13




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