can: raw: add missing refcount for memory leak fix

mainline inclusion
from mainline-v6.5
commit c275a176
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7PM10

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c275a176e4b69868576e543409927ae75e3a3288



---------------------------

Commit ee8b94c8 ("can: raw: fix receiver memory leak") introduced
a new reference to the CAN netdevice that has assigned CAN filters.
But this new ro->dev reference did not maintain its own refcount which
lead to another KASAN use-after-free splat found by Eric Dumazet.

This patch ensures a proper refcount for the CAN nedevice.

Fixes: ee8b94c8 ("can: raw: fix receiver memory leak")
Reported-by: Eric Dumazet <edumazet@google.com>
Cc: Ziyang Xuan <william.xuanziyang@huawei.com>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Link: https://lore.kernel.org/r/20230821144547.6658-3-socketcan@hartkopp.net


Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Conflicts:
	net/can/raw.c
Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>