rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=a324/1/0x4000000000000000 softirq=41308/41346 fqs=5206
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     6026          0            0
rcu: 	cputime:      282          0        52207   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=25097 q=5803 ncpus=2)
CPU: 0 UID: 0 PID: 10162 Comm: syz.1.960 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:__sanitizer_cov_trace_switch+0x37/0x130
Code: c1 f8 48 c1 c1 3d 48 83 f9 02 7f 1e 48 85 c9 74 3c 48 83 f9 01 0f 85 f4 00 00 00 b9 03 00 00 00 48 85 c0 75 36 e9 e5 00 00 00 <48> 83 f9 03 0f 84 cd 00 00 00 48 83 f9 07 0f 85 d1 00 00 00 b9 07
RSP: 0018:ffffc90002bbf060 EFLAGS: 00000202
RAX: 0000000000000002 RBX: ffff88803a42183c RCX: 0000000000000003
RDX: 0000000000000000 RSI: ffffffff8f580d40 RDI: 00000000fffffff1
RBP: dffffc0000000000 R08: ffff88803a52b980 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000000 R12: 00000000fffffff1
R13: ffff88803a421948 R14: dffffc0000000000 R15: ffff88803a421800
FS:  00007fd2f6a066c0(0000) GS:ffff8880b8618000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001200 CR3: 000000004007e000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 qdisc_tree_reduce_backlog+0x10e/0x480
 codel_change+0x811/0xa90
 codel_init+0x1f7/0x3e0
 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: 0033:0x7fd2f5b8ebe9
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:00007fd2f6a06038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fd2f5dc6090 RCX: 00007fd2f5b8ebe9
RDX: 0000000000000000 RSI: 0000200000001200 RDI: 0000000000000036
RBP: 00007fd2f5c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd2f5dc6128 R14: 00007fd2f5dc6090 R15: 00007ffc11e73268
 </TASK>
