[ 36.736445][ C3] BUG: spinlock bad magic on CPU#3, tc/302 [ 36.736692][ C3] lock: noop_qdisc+0x240/0x300, .magic: 00000000, .owner: tc/302, .owner_cpu: 3 [ 36.736939][ C3] CPU: 3 UID: 0 PID: 302 Comm: tc Not tainted 6.10.0-virtme #1 [ 36.737152][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 36.737453][ C3] Call Trace: [ 36.737574][ C3] [ 36.737645][ C3] dump_stack_lvl+0xb0/0xd0 [ 36.737779][ C3] do_raw_spin_unlock+0x1ac/0x220 [ 36.737919][ C3] _raw_spin_unlock+0x23/0x40 [ 36.738053][ C3] net_tx_action+0x402/0x660 [ 36.738189][ C3] handle_softirqs+0x1f9/0x5c0 [ 36.738328][ C3] ? dev_deactivate_many+0x1e2/0x8d0 [ 36.738475][ C3] do_softirq+0x4d/0xa0 [ 36.738577][ C3] [ 36.738645][ C3] [ 36.738711][ C3] __local_bh_enable_ip+0xf6/0x120 [ 36.738853][ C3] dev_deactivate_many+0x1e7/0x8d0 [ 36.738984][ C3] ? qdisc_create+0xdf/0xc90 [ 36.739117][ C3] ? tc_modify_qdisc+0x398/0x1490 [ 36.739253][ C3] ? netlink_rcv_skb+0x130/0x360 [ 36.739388][ C3] dev_deactivate+0xc1/0x1b0 [ 36.739523][ C3] ? __pfx_dev_deactivate+0x10/0x10 [ 36.739654][ C3] ? lockdep_init_map_type+0x2cb/0x7c0 [ 36.739788][ C3] ? __pfx_fifo_init+0x10/0x10 [ 36.739918][ C3] ? lockdep_init_map_type+0x2cb/0x7c0 [ 36.740050][ C3] qdisc_graft+0xb48/0x1110 [ 36.740183][ C3] ? trace_qdisc_create+0x118/0x190 [ 36.740314][ C3] ? qdisc_create+0x4cc/0xc90 [ 36.740450][ C3] ? __pfx_qdisc_graft+0x10/0x10 [ 36.740582][ C3] ? __pfx_qdisc_create+0x10/0x10 [ 36.740718][ C3] ? __nla_validate_parse+0x1bc/0x3d0 [ 36.740852][ C3] tc_modify_qdisc+0x95a/0x1490 [ 36.740989][ C3] ? trace_contention_end+0xeb/0x150 [ 36.741121][ C3] ? __pfx_tc_modify_qdisc+0x10/0x10 [ 36.741252][ C3] ? __mutex_lock+0x170/0xac0 [ 36.741388][ C3] ? trace_lock_acquire+0x14d/0x1f0 [ 36.741528][ C3] rtnetlink_rcv_msg+0x2fb/0xc10 [ 36.741663][ C3] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 36.741795][ C3] ? hlock_class+0x4e/0x130 [ 36.741927][ C3] ? mark_lock+0x38/0x3e0 [ 36.742028][ C3] ? __lock_acquire+0xb35/0x1560 [ 36.742161][ C3] netlink_rcv_skb+0x130/0x360 [ 36.742292][ C3] ? __pfx_rtnetlink_rcv_msg+0x10/0x10 [ 36.742425][ C3] ? __pfx_netlink_rcv_skb+0x10/0x10 [ 36.742561][ C3] ? netlink_deliver_tap+0x13e/0x340 [ 36.742700][ C3] ? netlink_deliver_tap+0xc3/0x340 [ 36.742839][ C3] netlink_unicast+0x44b/0x710 [ 36.742972][ C3] ? __pfx_netlink_unicast+0x10/0x10 [ 36.743106][ C3] netlink_sendmsg+0x723/0xbe0 [ 36.743242][ C3] ? __pfx_netlink_sendmsg+0x10/0x10 [ 36.743374][ C3] ? __import_iovec+0x35d/0x5d0 [ 36.743507][ C3] ____sys_sendmsg+0x7b2/0xa10 [ 36.743640][ C3] ? __pfx_____sys_sendmsg+0x10/0x10 [ 36.743776][ C3] ? __pfx_copy_msghdr_from_user+0x10/0x10 [ 36.743952][ C3] ___sys_sendmsg+0xee/0x170 [ 36.744084][ C3] ? __pfx____sys_sendmsg+0x10/0x10 [ 36.744216][ C3] ? kfree+0x2d/0x230 [ 36.744318][ C3] ? ___sys_recvmsg+0xe0/0x150 [ 36.744450][ C3] ? __pfx____sys_recvmsg+0x10/0x10 [ 36.744581][ C3] ? reacquire_held_locks+0x22f/0x4f0 [ 36.744714][ C3] ? do_user_addr_fault+0x8fd/0xe30 [ 36.744848][ C3] ? __fget_light+0x53/0x1e0 [ 36.744992][ C3] __sys_sendmsg+0xcd/0x170 [ 36.745122][ C3] ? __pfx___sys_sendmsg+0x10/0x10 [ 36.745254][ C3] ? __pfx___up_read+0x10/0x10 [ 36.745395][ C3] do_syscall_64+0xc1/0x1d0 [ 36.745529][ C3] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 36.745699][ C3] RIP: 0033:0x7f05c63437b7 [ 36.745846][ C3] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 [ 36.746325][ C3] RSP: 002b:00007ffda54d6938 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 36.746534][ C3] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f05c63437b7 [ 36.746734][ C3] RDX: 0000000000000000 RSI: 00007ffda54d69a0 RDI: 0000000000000005 [ 36.746947][ C3] RBP: 000000000047c620 R08: 0000000000000014 R09: 0000000000000000 [ 36.747152][ C3] R10: 00007f05c61fc708 R11: 0000000000000246 R12: 00007ffda54e6c78 [ 36.747353][ C3] R13: 0000000066ab887e R14: 00000000004829c0 R15: 00007f05c65d6000 [ 36.747562][ C3]