Tetsuo Handa ec38df2445 can: bcm/raw/isotp: use per module netdevice notifier ... commit 8d0caedb75 upstream. 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/54a5f451-05ed-f977-8534-79e7aa2bcc8f@i-love.sakura.ne.jp Cc: linux-stable <stable@vger.kernel.org> Reported-by: syzbot <syzbot+355f8edb2ff45d5f95fa@syzkaller.appspotmail.com> Reported-by: syzbot <syzbot+0f1827363a305f74996f@syzkaller.appspotmail.com> Reviewed-by: Kirill Tkhai <ktkhai@virtuozzo.com> Tested-by: syzbot <syzbot+355f8edb2ff45d5f95fa@syzkaller.appspotmail.com> Tested-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2021-06-30 08:48:55 -04:00
..
af_can.c	can: af_can: prevent potential access of uninitialized member in canfd_rcv()	2020-11-24 13:05:47 +01:00
af_can.h
bcm.c	can: bcm/raw/isotp: use per module netdevice notifier	2021-06-30 08:48:55 -04:00
gw.c	can: gw: ensure DLC boundaries after CAN frame modification	2019-01-23 08:09:46 +01:00
Kconfig
Makefile
proc.c	can: proc: can_remove_proc(): silence remove_proc_entry warning	2020-11-22 10:00:25 +01:00
raw.c	can: bcm/raw/isotp: use per module netdevice notifier	2021-06-30 08:48:55 -04:00