rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 GPs behind) idle=d964/1/0x4000000000000000 softirq=256129/256130 fqs=5236
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     7211          0            0
rcu: 	cputime:      452          0        52021   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=142169 q=8158 ncpus=2)
CPU: 0 UID: 0 PID: 27315 Comm: syz.1.5568 Not tainted 6.16.0-rc5-syzkaller-00212-g9f735b6f8a77-dirty #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_const_cmp4+0x37/0x90
Code: 08 a0 9f 92 65 8b 0d 98 6f df 10 81 e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75 5b 83 ba 3c 16 00 00 00 74 52 8b 8a 18 16 00 00 <83> f9 03 75 47 48 8b 8a 20 16 00 00 44 8b 8a 1c 16 00 00 49 c1 e1
RSP: 0018:ffffc90004c56f88 EFLAGS: 00000246
RAX: ffffffff8976fa73 RBX: 00000000ffff0000 RCX: 0000000000000002
RDX: ffff888111441cc0 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffff888111441cc0 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000002 R12: 00000000fffffff1
R13: dffffc0000000000 R14: ffff888123634000 R15: ffff888022c40000
FS:  00007f646248b6c0(0000) GS:ffff8880b8626000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f646248afc8 CR3: 000000011f5d0000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 qdisc_lookup_rcu+0x73/0x6d0
 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: 0033:0x7f646158e9a9
Code: Unable to access opcode bytes at 0x7f646158e97f.
RSP: 002b:00007f646248b038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f64617b5fa0 RCX: 00007f646158e9a9
RDX: 0000000000000000 RSI: 0000200000001200 RDI: 0000000000000003
RBP: 00007f6461610d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f64617b5fa0 R15: 00007fff19ad7c48
 </TASK>
