TITLE: INFO: rcu detected stall in ip_set_ad
ALT: stall in ip_set_ad
TYPE: HANG

[  160.301453] rcu: INFO: rcu_sched self-detected stall on CPU
[  160.304751] rcu: 	3-....: (25999 ticks this GP) idle=316/1/0x4000000000000002 softirq=12584/12584 fqs=6496 
[  160.306069] 	(t=26004 jiffies g=21605 q=494)
[  160.306603] NMI backtrace for cpu 3
[  160.307035] CPU: 3 PID: 11498 Comm: syz-executor.4 Not tainted 5.5.0-rc6-next-20200117+ #9
[  160.308027] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
[  160.309066] Call Trace:
[  160.309432]  <IRQ>
[  160.309754]  dump_stack+0xee/0x16e
[  160.310185]  nmi_cpu_backtrace.cold.7+0x55/0x95
[  160.311247]  nmi_trigger_cpumask_backtrace+0x1bb/0x20b
[  160.311804]  rcu_dump_cpu_stacks+0x1a1/0x1ed
[  160.312319]  rcu_sched_clock_irq.cold.87+0x707/0x917
[  160.313403]  update_process_times+0x24/0x70
[  160.313883]  tick_sched_handle+0x139/0x180
[  160.314436]  tick_sched_timer+0x40/0x120
[  160.314891]  __hrtimer_run_queues+0x33a/0xc90
[  160.317060]  hrtimer_interrupt+0x2e9/0x730
[  160.317548]  smp_apic_timer_interrupt+0x104/0x500
[  160.318114]  apic_timer_interrupt+0xf/0x20
[  160.318605]  </IRQ>
[  160.318881] RIP: 0010:hash_ip4_expire.isra.17+0x1ab/0x8c0
[  160.319521] Code: 48 89 74 24 18 83 e6 07 48 c1 e8 03 42 0f b6 04 28 40 38 f0 7f 08 84 c0 0f 85 53 06 00 00 4c 8b 74 24 08 31 ff 41 0f b6 5e 19 <89> de e8 fe fc c1 fe 84 db 0f 84 d5 04 00 00 e8 21 fc c1 fe 4c 89
[  160.321749] RSP: 0018:ffffc90015416ee0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
[  160.322642] RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffffffae3c9a8a
[  160.323575] RDX: 0000000000040000 RSI: 0000000000000001 RDI: 0000000000000000
[  160.324567] RBP: ffff888038b081d0 R08: ffff888004609740 R09: ffffed1007161033
[  160.325377] R10: ffffed1007161032 R11: ffff888038b08197 R12: ffff888038b08190
[  160.326393] R13: dffffc0000000000 R14: ffff888038b08400 R15: ffff88806e306c00
[  160.328071]  hash_ip4_add+0x176/0x1ba9
[  160.328507]  hash_ip4_uadt+0x51f/0x7f0
[  160.330813]  call_ad+0x17f/0x560
[  160.334121]  ip_set_ad.isra.33+0x57c/0xc50
[  160.336234]  nfnetlink_rcv_msg+0xcb1/0xf80
[  160.339257]  netlink_rcv_skb+0x14f/0x400
[  160.341699]  nfnetlink_rcv+0x1ac/0x420
[  160.343981]  netlink_unicast+0x558/0x750
[  160.347027]  netlink_sendmsg+0x852/0xd90
[  160.350013]  sock_sendmsg+0x147/0x180
[  160.350578]  ____sys_sendmsg+0x6a9/0x820
[  160.351750]  ___sys_sendmsg+0x10a/0x180
[  160.355082]  __sys_sendmsg+0xfb/0x1d0
[  160.357764]  do_syscall_64+0xbc/0x5c0
[  160.358303]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  160.358912] RIP: 0033:0x466879
[  160.359273] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
[  160.361778] RSP: 002b:00007f880fa7fc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[  160.362915] RAX: ffffffffffffffda RBX: 000000000052bf00 RCX: 0000000000466879
[  160.363973] RDX: 0000000000000000 RSI: 0000000020000d00 RDI: 0000000000000003
[  160.365039] RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
[  160.366100] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f880fa806bc
[  160.367142] R13: 00000000000008c7 R14: 00000000004b027b R15: 00000000004e7180
