================================
WARNING: inconsistent lock state
syzkaller #0 Not tainted
--------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
syz.0.775/8642 [HC0[0]:SC1[1]:HE1:SE0] takes:
ffff8881103dfca8 (&p->tcfa_lock){+.?.}-{3:3}, at: est_timer+0xd4/0x9f0
{SOFTIRQ-ON-W} state was registered at:
  lock_acquire+0x120/0x360
  _raw_spin_lock+0x2e/0x40
  tcf_skbedit_init+0xaf4/0xff0
  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: 1168
hardirqs last  enabled at (1168): [<ffffffff8b7cceb3>] _raw_spin_unlock_irq+0x23/0x50
hardirqs last disabled at (1167): [<ffffffff8b7ccc2d>] _raw_spin_lock_irq+0x7d/0xf0
softirqs last  enabled at (718): [<ffffffff81686d4c>] fpu_clone+0x35c/0xbb0
softirqs last disabled at (1139): [<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 ***

7 locks held by syz.0.775/8642:
 #0: ffff8881006f5b88 (vm_lock){++++}-{0:0}, at: lock_vma_under_rcu+0x19f/0x3d0
 #1: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: __handle_mm_fault+0x27b7/0x5440
 #2: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: filemap_map_pages+0x150/0x1740
 #3: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: ___pte_offset_map+0x29/0x250
 #4: ffff88810fea8258 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: __pte_offset_map_lock+0x13e/0x210
 #5: ffffffff8e139fa0 (rcu_read_lock_sched){....}-{1:2}, at: pfn_valid+0xba/0x490
 #6: ffffc900001e0be0 ((&est->timer)){+.-.}-{0:0}, at: call_timer_fn+0xbe/0x5f0

stack backtrace:
CPU: 1 UID: 0 PID: 8642 Comm: syz.0.775 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
 est_timer+0xd4/0x9f0
 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:lock_acquire+0x175/0x360
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 3b 64 03 11 <48> 3b 44 24 58 0f 85 f2 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0000:ffffc90006857880 EFLAGS: 00000206
RAX: 42e453c263595d00 RBX: 0000000000000000 RCX: 42e453c263595d00
RDX: 0000000000000000 RSI: ffffffff8dba8a8b RDI: ffffffff8be33800
RBP: ffffffff822e636a R08: 0000000000000000 R09: ffffffff822e636a
R10: dffffc0000000000 R11: fffff9400088e0f1 R12: 0000000000000002
R13: ffffffff8e139fa0 R14: 0000000000000000 R15: 0000000000000246
 pfn_valid+0xd6/0x490
 page_table_check_set+0x25/0x730
 set_pte_range+0x6a5/0x700
 filemap_map_pages+0xf32/0x1740
 __handle_mm_fault+0x34ac/0x5440
 handle_mm_fault+0x40a/0x8e0
 do_user_addr_fault+0xa81/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7fc62806ef0d
Code: ff 48 83 e8 01 48 89 ee bf 01 00 00 00 48 c1 e0 0e 48 c1 ee 06 48 01 c8 48 89 e9 81 e6 ff 3f 00 00 48 c1 e9 03 83 e1 07 d3 e7 <40> 84 bc 06 20 20 00 00 0f 85 11 fd ff ff e9 c0 fd ff ff e8 4b 2b
RSP: 002b:00007ffce0723820 EFLAGS: 00010202
RAX: 000000110c26c000 RBX: 00007fc628ef5720 RCX: 0000000000000003
RDX: 0000000000001758 RSI: 00000000000000dd RDI: 0000000000000008
RBP: ffffffff82503758 R08: 00007fc6283c6038 R09: 00007fc6283b2000
R10: 00007fc627bff008 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff82503758 R15: 0000000000001560
 </TASK>
