rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=cd44/1/0x4000000000000000 softirq=44492/44493 fqs=5189
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     7114          0            0
rcu: 	cputime:      337          0        52140   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=28761 q=3377 ncpus=2)
CPU: 0 UID: 0 PID: 11086 Comm: syz.2.1479 Not tainted 6.16.0-rc5-syzkaller-00159-g47c84997c686 #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:qdisc_lookup_rcu+0xd2/0x6d0
Code: 48 ab f8 4d 8b 24 24 4c 89 e0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 e7 e8 4b 48 ab f8 4d 8b 2c 24 4d 85 ed 0f 84 83 00 00 00 <4d> 8d 66 10 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f
RSP: 0018:ffffc90002adef50 EFLAGS: 00000286
RAX: 1ffff11004f14b80 RBX: 00000000ffff0000 RCX: ffff888030a15640
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffff888030a15640 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000000 R12: ffff8880278a5c00
R13: ffff888105316000 R14: ffff888035a38000 R15: ffff888105316000
FS:  00007f7d527fe6c0(0000) GS:ffff8880b8626000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7d527ddd58 CR3: 0000000127ccc000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 qdisc_tree_reduce_backlog+0x1b2/0x480
 fq_codel_change+0xa96/0xef0
 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+0x75c/0x8e0
 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: 0033:0x7f7d5198e929
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:00007f7d527fe038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f7d51bb6160 RCX: 00007f7d5198e929
RDX: 040000000000009f RSI: 00002000000002c0 RDI: 0000000000000008
RBP: 00007f7d51a10ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7d51bb6160 R15: 00007fff2dea28f8
 </TASK>
