rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10499 ticks this GP) idle=b94c/1/0x4000000000000000 softirq=179857/179857 fqs=5213
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     5287          0            0
rcu: 	cputime:      284          0        52175   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=125117 q=4273 ncpus=2)
CPU: 1 UID: 0 PID: 2002 Comm: syz.0.7963 Not tainted 6.16.0-syzkaller-12063-g37816488247d #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+0x32d/0x6d0
Code: 28 00 74 08 4c 89 ff e8 c1 82 9f f8 4d 8b 37 e8 49 2b f5 01 89 c5 31 ff 89 c6 e8 4e 1c 3c f8 85 ed 74 1b e8 d5 9b 21 f8 89 c5 <31> ff 89 c6 e8 3a 1c 3c f8 85 ed 74 6b e8 f1 17 3c f8 eb 05 e8 ea
RSP: 0018:ffffc9000a836ff0 EFLAGS: 00000286
RAX: 0000000000000001 RBX: 00000000ffff0000 RCX: 4dc4729cc8c12b00
RDX: ffff888118ffd640 RSI: ffffffff8dba3961 RDI: ffffffff8be32680
RBP: 0000000000000001 R08: ffff888118ffd640 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000000 R12: ffff88811fb60838
R13: dffffc0000000000 R14: ffff88803a3a3000 R15: ffff88810b9ca478
FS:  00007f9b5235b6c0(0000) GS:ffff8881a3c21000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000240 CR3: 000000003c31c000 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+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: 0033:0x7f9b5158ebe9
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:00007f9b5235b038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f9b517b5fa0 RCX: 00007f9b5158ebe9
RDX: 0000000000000000 RSI: 0000200000000640 RDI: 0000000000000006
RBP: 00007f9b51611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9b517b6038 R14: 00007f9b517b5fa0 R15: 00007ffd38b718f8
 </TASK>
