rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=4bf4/1/0x4000000000000000 softirq=28984/28988 fqs=5187
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     6025          0            0
rcu: 	cputime:      389          0        52088   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=19597 q=4841 ncpus=2)
CPU: 0 UID: 0 PID: 8839 Comm: syz.0.951 Not tainted 6.16.0-rc3-syzkaller-00159-g223e2288f4b8 #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:rcu_lockdep_current_cpu_online+0xe8/0x120
Code: 00 74 08 48 89 df e8 87 77 7c 00 4c 85 3b 75 1a 48 c7 c7 00 4b 14 8e be 04 00 00 00 e8 e1 79 7c 00 83 3d 3a e0 6c 0c 00 74 16 <b0> 01 65 ff 0d 5f c5 f8 10 74 0f 5b 41 5e 41 5f e9 c3 57 ca 09 cc
RSP: 0018:ffffc90001bcef80 EFLAGS: 00000202
RAX: 1ffffffff1c2884e RBX: ffffffff8e144270 RCX: c577fd6a79f76100
RDX: ffff88811ab7b980 RSI: ffffffff8be28fa0 RDI: ffff88804b03afa8
RBP: 0000000000000001 R08: ffff88811ab7b980 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000000 R12: ffff88811b81c038
R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000001
FS:  00007f979c3e46c0(0000) GS:ffff8880b861d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001480 CR3: 000000003a674000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 rcu_read_lock_held+0x1e/0x50
 qdisc_lookup_rcu+0x381/0x6d0
 qdisc_tree_reduce_backlog+0x1b2/0x480
 codel_change+0x859/0xae0
 codel_init+0x1f7/0x3e0
 qdisc_create+0x7ac/0xea0
 tc_modify_qdisc+0x1426/0x2010
 rtnetlink_rcv_msg+0x77c/0xb70
 netlink_rcv_skb+0x208/0x470
 netlink_unicast+0x75b/0x8d0
 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: 0033:0x7f979b58e929
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:00007f979c3e4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f979b7b5fa0 RCX: 00007f979b58e929
RDX: 040000000000009f RSI: 00002000000002c0 RDI: 0000000000000006
RBP: 00007f979b610b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f979b7b5fa0 R15: 00007ffedec2ebd8
 </TASK>
