================================
WARNING: inconsistent lock state
syzkaller #0 Not tainted
--------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
swapper/0/0 [HC0[0]:SC1[3]:HE1:SE0] takes:
ffff88802ef08ca8 (&p->tcfa_lock){+.?.}-{3:3}, at: tcf_gact_act+0x3bf/0x6c0
{SOFTIRQ-ON-W} state was registered at:
  lock_acquire+0x120/0x360
  _raw_spin_lock+0x2e/0x40
  tcf_ct_init+0x7cc/0x1950
  tcf_action_init_1+0x463/0x6d0
  tcf_action_init+0x2cf/0xab0
  tc_ctl_action+0x430/0xbd0
  rtnetlink_rcv_msg+0x77c/0xb70
  netlink_rcv_skb+0x208/0x470
  netlink_unicast+0x82f/0x9e0
  netlink_sendmsg+0x805/0xb30
  __sock_sendmsg+0x21c/0x270
  ____sys_sendmsg+0x505/0x830
  ___sys_sendmsg+0x21f/0x2a0
  __x64_sys_sendmsg+0x19b/0x260
  do_syscall_64+0xfa/0x3b0
  entry_SYSCALL_64_after_hwframe+0x77/0x7f
irq event stamp: 4823634
hardirqs last  enabled at (4823634): [<ffffffff8967a682>] read_seqbegin+0x122/0x250
hardirqs last disabled at (4823633): [<ffffffff8967a64a>] read_seqbegin+0xea/0x250
softirqs last  enabled at (4823558): [<ffffffff8184f4da>] __irq_exit_rcu+0xca/0x1f0
softirqs last disabled at (4823595): [<ffffffff8184f4da>] __irq_exit_rcu+0xca/0x1f0

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&p->tcfa_lock);
  <Interrupt>
    lock(&p->tcfa_lock);

 *** DEADLOCK ***

5 locks held by swapper/0/0:
 #0: ffffc90000007be0 ((&in_dev->mr_ifc_timer)){+.-.}-{0:0}, at: call_timer_fn+0xbe/0x5f0
 #1: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: ip_output+0x5b/0x450
 #2: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: ip_finish_output2+0x452/0x1160
 #3: ffffffff8e139f40 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit+0x27b/0x3b50
 #4: ffff88802f67e108 (&sch->root_lock_key#652){+.-.}-{3:3}, at: __dev_queue_xmit+0xd70/0x3b50

stack backtrace:
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <IRQ>
 dump_stack_lvl+0x189/0x250
 print_usage_bug+0x297/0x2e0
 valid_state+0xc3/0xf0
 mark_lock_irq+0x36/0x390
 mark_lock+0x11b/0x190
 __lock_acquire+0x680/0xd20
 lock_acquire+0x120/0x360
 _raw_spin_lock+0x2e/0x40
 tcf_gact_act+0x3bf/0x6c0
 tcf_action_exec+0x2f5/0x8e0
 tcf_classify+0x755/0x1140
 hfsc_enqueue+0x323/0xf20
 dev_qdisc_enqueue+0x4e/0x260
 __dev_queue_xmit+0xe83/0x3b50
 ip_finish_output2+0xd40/0x1160
 ip_output+0x29f/0x450
 igmp_ifc_timer_expire+0xbb6/0xde0
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:pv_native_safe_halt+0x13/0x20
Code: 53 e7 02 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d f3 f6 0d 00 f3 0f 1e fa fb f4 <c3> cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffffff8de07d80 EFLAGS: 00000282
RAX: c17dfa6211812800 RBX: ffffffff819683c8 RCX: c17dfa6211812800
RDX: 0000000000000001 RSI: ffffffff8d9b95c1 RDI: ffffffff8be33800
RBP: ffffffff8de07eb8 R08: ffff88804b032f9b R09: 1ffff110096065f3
R10: dffffc0000000000 R11: ffffed10096065f4 R12: ffffffff8fa39330
R13: 0000000000000000 R14: 0000000000000000 R15: 1ffffffff1bd2a20
 default_idle+0x13/0x20
 default_idle_call+0x74/0xb0
 do_idle+0x1e8/0x510
 cpu_startup_entry+0x44/0x60
 rest_init+0x2de/0x300
 start_kernel+0x3a9/0x410
 x86_64_start_reservations+0x24/0x30
 x86_64_start_kernel+0x143/0x1c0
 common_startup_64+0x13e/0x147
 </TASK>
