rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=c7fc/1/0x4000000000000000 softirq=68219/68226 fqs=5249
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     5282          0            0
rcu: 	cputime:      291          0        52207   ==> 52510(ms)
rcu: 	(t=10502 jiffies g=57093 q=1085 ncpus=2)
CPU: 1 UID: 0 PID: 17384 Comm: syz.2.3585 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
RIP: 0010:lock_is_held_type+0x38/0x190
Code: 48 83 ec 10 65 48 8b 05 16 95 2a 07 48 89 44 24 08 bb ff ff ff ff 83 3d 45 5d 2f 04 00 0f 84 fe 00 00 00 65 8b 05 08 d5 2a 07 <85> c0 0f 85 ef 00 00 00 65 4c 8b 2c 25 08 70 9e 92 41 83 bd ec 0a
RSP: 0018:ffffc90002b5f028 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: dfcaa41f87528000
RDX: ffff88801fe45640 RSI: 00000000ffffffff RDI: ffffffff8e13a0e0
RBP: 0000000000000001 R08: ffff88801fe45640 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000002 R12: 00000000fffffff1
R13: dffffc0000000000 R14: ffff8880245bf000 R15: ffff888108f12000
FS:  00007fab858236c0(0000) GS:ffff8881a3c39000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fab84974c80 CR3: 000000012d7fc000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 qdisc_lookup_rcu+0x68/0x6d0
 qdisc_tree_reduce_backlog+0x1b2/0x480
 hhf_change+0x805/0xb40
 hhf_init+0x213/0x950
 qdisc_create+0x7ac/0xea0
 tc_modify_qdisc+0x1538/0x20e0
 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
RIP: 0033:0x7fab8498ec29
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fab85823038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fab84bd5fa0 RCX: 00007fab8498ec29
RDX: 0000000000000000 RSI: 0000200000001200 RDI: 0000000000000003
RBP: 00007fab84a11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fab84bd6038 R14: 00007fab84bd5fa0 R15: 00007fff3f3febd8
 </TASK>
