syzbot is reporting locking bug in inet_autobind(), for
commit 37159ef2c1ae1e69 ("l2tp: fix a lockdep splat") started
calling
lockdep_set_class_and_name(&sk->sk_lock.slock, &l2tp_socket_class, "l2tp_sock")
in l2tp_tunnel_create() (which is currently in l2tp_tunnel_register()).
How can we fix this problem?
------------[ cut here ]------------
class->name=slock-AF_INET6 lock->name=l2tp_sock lock->key=l2tp_socket_class
WARNING: CPU: 2 PID: 9237 at kernel/locking/lockdep.c:940 look_up_lock_class+0xcc/0x140
Modules linked in:
CPU: 2 PID: 9237 Comm: a.out Not tainted 6.0.0-rc5-00094-ga335366bad13-dirty #860
Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS VirtualBox 12/01/2006
RIP: 0010:look_up_lock_class+0xcc/0x140
On 2019/05/16 14:46, syzbot wrote:
> HEAD commit: 35c99ffa Merge tag 'for_linus' of git://git.kernel.org/pub..
> git tree: net-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=10e970f4a00000
> kernel config: https://syzkaller.appspot.com/x/.config?x=82f0809e8f0a8c87
> dashboard link: https://syzkaller.appspot.com/bug?extid=94cc2a66fc228b23f360
> compiler: gcc (GCC) 9.0.0 20181231 (experimental)
C reproducer is available at
https://syzkaller.appspot.com/text?tag=ReproC&x=15062310080000 .
