================================
WARNING: inconsistent lock state
syzkaller #0 Not tainted
--------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
syz-executor/6321 [HC0[0]:SC1[1]:HE1:SE0] takes:
ffff888026c83ca8 (&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: 2108360
hardirqs last  enabled at (2108360): [<ffffffff8b7cceb3>] _raw_spin_unlock_irq+0x23/0x50
hardirqs last disabled at (2108359): [<ffffffff8b7ccc2d>] _raw_spin_lock_irq+0x7d/0xf0
softirqs last  enabled at (2108154): [<ffffffff89f18790>] tcp_close+0x30/0x110
softirqs last disabled at (2108357): [<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-executor/6321:
 #0: ffffffff8e1f0fb0 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm+0x131/0x4b0
 #1: ffff8880285f81e0 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x12e/0x1ac0
 #2: ffff888031f281e0 (&mm->mmap_lock/1){+.+.}-{4:4}, at: dup_mmap+0x217/0x1ac0
 #3: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: ___pte_offset_map+0x29/0x250
 #4: ffff88802221a558 (ptlock_ptr(ptdesc)#2){+.+.}-{3:3}, at: __pte_offset_map_lock+0x13e/0x210
 #5: ffffffff8e139ee0 (rcu_read_lock){....}-{1:3}, at: ___pte_offset_map+0x29/0x250
 #6: ffffc90000007be0 ((&est->timer)){+.-.}-{0:0}, at: call_timer_fn+0xbe/0x5f0

stack backtrace:
CPU: 0 UID: 0 PID: 6321 Comm: syz-executor 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:__sanitizer_cov_trace_pc+0x37/0x70
Code: 08 c0 a0 92 65 8b 15 88 14 e1 10 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 3c 16 00 00 00 74 2c 8b 91 18 16 00 00 <83> fa 02 75 21 48 8b 91 20 16 00 00 48 8b 32 48 8d 7e 01 8b 89 1c
RSP: 0018:ffffc90004ea7320 EFLAGS: 00000246
RAX: ffffffff820ff46f RBX: 00007f419f400000 RCX: ffff88810a3f8000
RDX: 0000000000000000 RSI: 0000000000000043 RDI: 0000000000000043
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff820ff2c9
R10: dffffc0000000000 R11: fffff520009d4e54 R12: 00000000125cf067
R13: dffffc0000000000 R14: ffff8880125ca7d0 R15: 0000000000000043
 ___pte_offset_map+0x1cf/0x250
 pte_offset_map_rw_nolock+0x3b/0x160
 copy_pmd_range+0x6ab/0x71d0
 copy_page_range+0xc14/0x1270
 dup_mmap+0xf57/0x1ac0
 copy_mm+0x13c/0x4b0
 copy_process+0x1706/0x3c00
 kernel_clone+0x21e/0x840
 __x64_sys_clone+0x18b/0x1e0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f41a0385453
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007fffd358fe48 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f41a0385453
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 000055558875f7d0 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000000927c0 R14: 000000000002ea2d R15: 00007fffd358ffe0
 </TASK>
