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can: bcm/raw/isotp: use per module netdevice notifier
syzbot is reporting hung task at register_netdevice_notifier() [1] and unregister_netdevice_notifier() [2], for cleanup_net() might perform time consuming operations while CAN driver's raw/bcm/isotp modules are calling {register,unregister}_netdevice_notifier() on each socket. Change raw/bcm/isotp modules to call register_netdevice_notifier() from module's __init function and call unregister_netdevice_notifier() from module's __exit function, as with gw/j1939 modules are doing. Link: https://syzkaller.appspot.com/bug?id=391b9498827788b3cc6830226d4ff5be87107c30 [1] Link: https://syzkaller.appspot.com/bug?id=1724d278c83ca6e6df100a2e320c10d991cf2bce [2] Link: https://lore.kernel.org/r/[email protected] Cc: linux-stable <[email protected]> Reported-by: syzbot <[email protected]> Reported-by: syzbot <[email protected]> Reviewed-by: Kirill Tkhai <[email protected]> Tested-by: syzbot <[email protected]> Tested-by: Oliver Hartkopp <[email protected]> Signed-off-by: Tetsuo Handa <[email protected]> Signed-off-by: Marc Kleine-Budde <[email protected]>
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