================================
WARNING: inconsistent lock state
syzkaller #0 Not tainted
--------------------------------
inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
dhcpcd-run-hook/7860 [HC0[0]:SC1[1]:HE1:SE0] takes:
ffff88802fc9f0a8 (&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: 290
hardirqs last  enabled at (290): [<ffffffff8b7cceb3>] _raw_spin_unlock_irq+0x23/0x50
hardirqs last disabled at (289): [<ffffffff8b7ccc2d>] _raw_spin_lock_irq+0x7d/0xf0
softirqs last  enabled at (0): [<ffffffff8182a66f>] copy_process+0x97f/0x3c00
softirqs last disabled at (269): [<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 ***

2 locks held by dhcpcd-run-hook/7860:
 #0: ffff88802a99c260 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock_maybe_expand+0xbc/0x3c0
 #1: ffffc90000007be0 ((&est->timer)){+.-.}-{0:0}, at: call_timer_fn+0xbe/0x5f0

stack backtrace:
CPU: 0 UID: 0 PID: 7860 Comm: dhcpcd-run-hook 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_release+0x2b5/0x3e0
Code: 51 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 75 56 f7 c3 00 02 00 00 74 01 fb 65 48 8b 05 cb 51 03 11 <48> 3b 44 24 28 0f 85 8b 00 00 00 48 83 c4 30 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc9000ac17270 EFLAGS: 00000206
RAX: 0beabb43098e8b00 RBX: 0000000000000202 RCX: 0beabb43098e8b00
RDX: 0000000000000001 RSI: ffffffff8dba8a8b RDI: ffffffff8be33800
RBP: ffff888021048b18 R08: ffffc9000ac17407 R09: 0000000000000000
R10: ffffc9000ac173f8 R11: fffff52001582e81 R12: 0000000000000001
R13: 0000000000000001 R14: ffffffff8e139ee0 R15: ffff888021048000
 unwind_next_frame+0x19a9/0x2390
 arch_stack_walk+0x11c/0x150
 stack_trace_save+0x9c/0xe0
 kasan_save_track+0x3e/0x80
 __kasan_slab_alloc+0x6c/0x80
 kmem_cache_alloc_noprof+0x1c1/0x3c0
 ptlock_alloc+0x20/0x70
 pte_alloc_one+0x7d/0x170
 __pte_alloc+0x25/0x1a0
 __handle_mm_fault+0x49b3/0x5440
 handle_mm_fault+0x40a/0x8e0
 __get_user_pages+0x1699/0x2ce0
 get_user_pages_remote+0x2f1/0xad0
 get_arg_page+0x104/0x330
 copy_string_kernel+0x191/0x2a0
 do_execveat_common+0x3c5/0x6a0
 __x64_sys_execve+0x94/0xb0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4cca2fcef7
Code: ba 0f 00 5b 5d 41 5c 41 5d 41 5e 41 5f e9 63 d8 fb ff 48 83 c4 18 5b 5d 41 5c 41 5d 41 5e 41 5f c3 66 90 b8 3b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 01 3f 0f 00 f7 d8 64 89 01 48
RSP: 002b:00007ffd7ba14198 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 0000560a5b773f58 RCX: 00007f4cca2fcef7
RDX: 0000560a5b773f78 RSI: 0000560a5b773f58 RDI: 0000560a5b774000
RBP: 0000560a5b774000 R08: fefefefefefefeff R09: ffffffffff000000
R10: 00000000ca2d7b01 R11: 0000000000000246 R12: 0000560a5b773f78
R13: 00007f4cca4aa904 R14: 0000560a5b773f78 R15: 0000000000000000
 </TASK>
