rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=a574/1/0x4000000000000000 softirq=99221/99227 fqs=5248
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     5813          0            0
rcu: 	cputime:      294          0        52195   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=75889 q=2575 ncpus=2)
CPU: 1 UID: 0 PID: 21493 Comm: syz.2.4696 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+0x137/0x190
Code: 01 75 44 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 75 4c 41 f7 c4 00 02 00 00 74 01 fb 65 48 8b 05 f9 63 26 07 <48> 3b 44 24 08 75 43 89 d8 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffffc9000d77eec8 EFLAGS: 00000206
RAX: 3ffed4aa19991200 RBX: 0000000000000001 RCX: 3ffed4aa19991200
RDX: ffff888105451cc0 RSI: ffffffff8dba9b22 RDI: ffffffff8be33f80
RBP: 00000000ffffffff R08: ffff888105451cc0 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000002 R12: 0000000000000246
R13: ffff888105451cc0 R14: ffffffff8e13a0e0 R15: 0000000000000002
FS:  00007feda31306c0(0000) GS:ffff8881a3c12000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007feda254cf00 CR3: 00000001230de000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 qdisc_lookup_rcu+0x32b/0x6d0
 qdisc_tree_reduce_backlog+0x1b2/0x480
 fq_codel_change+0x9f6/0xda0
 fq_codel_init+0x355/0x960
 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+0x52d/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __sys_sendmmsg+0x227/0x430
 __x64_sys_sendmmsg+0xa0/0xc0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7feda238ec29
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:00007feda3130038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007feda25d5fa0 RCX: 00007feda238ec29
RDX: 040000000000009f RSI: 00002000000002c0 RDI: 0000000000000003
RBP: 00007feda2411e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007feda25d6038 R14: 00007feda25d5fa0 R15: 00007ffc4883f478
 </TASK>
