This is due to a bug in kernel/sys.c in the function
notifier_chain_unregister().
where the 'notifier_lock' can't be acquired while reboot is running.
I suspect any other drivers that call this function on shutdown from
unregister_reboot_notifier() (in the case where the root filesystem is
This is due to a bug in kernel/sys.c in the function
notifier_chain_unregister().
where the 'notifier_lock' can't be acquired while reboot is running.
I suspect any other drivers that call this function on shutdown from
unregister_reboot_notifier() (in the case where the root filesystem is
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