rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10499 ticks this GP) idle=5e5c/1/0x4000000000000000 softirq=65227/65227 fqs=5220
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     6684          0            0
rcu: 	cputime:      293          0        52172   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=52457 q=1109 ncpus=2)
CPU: 1 UID: 0 PID: 14395 Comm: syz.2.2189 Not tainted 6.16.0-rc5-syzkaller-00212-g9f735b6f8a77 #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+0x219/0x6d0
Code: 20 05 00 00 4d 01 ee 4c 89 f0 48 c1 e8 03 49 bd 00 00 00 00 00 fc ff df 42 80 3c 28 00 74 08 4c 89 f7 e8 3a 44 ab f8 4d 8b 36 <4d> 85 f6 0f 94 c0 49 83 c6 d8 0f 94 c1 08 c1 74 0a e8 11 30 49 f8
RSP: 0018:ffffc9000306ef90 EFLAGS: 00000246
RAX: 1ffff11020f434ab RBX: 00000000ffff0000 RCX: ffff8881097c3980
RDX: 0000000000000000 RSI: 00000000ffff0000 RDI: 0000000080e10000
RBP: 0000000080e10000 R08: ffff8881097c3980 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000000 R12: ffff888101ef2038
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888107a1a000
FS:  00007f63bb0706c0(0000) GS:ffff8881a3c26000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f63bb06ffc8 CR3: 00000001100d0000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 qdisc_tree_reduce_backlog+0x1b2/0x480
 fq_change+0x1519/0x1f50
 fq_init+0x699/0x960
 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+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f63ba18e9a9
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:00007f63bb070038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f63ba3b5fa0 RCX: 00007f63ba18e9a9
RDX: 0000000000000040 RSI: 0000200000001200 RDI: 0000000000000003
RBP: 00007f63ba210d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f63ba3b5fa0 R15: 00007ffe838187d8
 </TASK>
