INFO: trying to register non-static key. the code is fine but needs lockdep annotation. turning off the locking correctness validator. CPU: 0 PID: 28095 Comm: syz-executor.0 Not tainted 5.8.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x18f/0x20d lib/dump_stack.c:118 assign_lock_key kernel/locking/lockdep.c:894 [inline] register_lock_class+0x157d/0x1630 kernel/locking/lockdep.c:1206 __lock_acquire+0xfa/0x56e0 kernel/locking/lockdep.c:4259 lock_acquire+0x1f1/0xad0 kernel/locking/lockdep.c:4959 del_timer_sync+0xab/0x270 kernel/time/timer.c:1354 red_destroy+0x33/0x70 net/sched/sch_red.c:219 qdisc_create+0xcd9/0x12e0 net/sched/sch_api.c:1295 tc_modify_qdisc+0x4c8/0x1990 net/sched/sch_api.c:1662 rtnetlink_rcv_msg+0x44e/0xad0 net/core/rtnetlink.c:5460 netlink_rcv_skb+0x15a/0x430 net/netlink/af_netlink.c:2470 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline] netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:671 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2363 ___sys_sendmsg+0xf3/0x170 net/socket.c:2417 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2450 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:384 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45c1f9 Code: Bad RIP value. RSP: 002b:00007fa235cc3c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000002b5c0 RCX: 000000000045c1f9 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000004 RBP: 000000000078bfe0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bfac R13: 00007fffdbb4c73f R14: 00007fa235cc49c0 R15: 000000000078bfac ------------[ cut here ]------------ ODEBUG: assert_init not available (active state 0) object type: timer_list hint: 0x0 WARNING: CPU: 1 PID: 28095 at lib/debugobjects.c:485 debug_print_object+0x160/0x250 lib/debugobjects.c:485