rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=75b4/1/0x4000000000000000 softirq=16816/16817 fqs=5211
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     5281          0            0
rcu: 	cputime:      229          0        52260   ==> 52490(ms)
rcu: 	(t=10500 jiffies g=7997 q=3806 ncpus=2)
CPU: 1 UID: 0 PID: 6506 Comm: syz.2.126 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:qdisc_lookup_rcu+0x5a/0x6d0
Code: 8d b7 c8 04 00 00 4c 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 04 46 ab f8 4d 8b 36 e8 6c 65 f6 01 89 c5 31 ff 89 c6 <e8> 21 36 49 f8 85 ed 74 29 e8 38 07 2f f8 89 c5 31 ff 89 c6 e8 0d
RSP: 0018:ffffc9000677f070 EFLAGS: 00000246
RAX: 0000000000000001 RBX: 00000000ffff0000 RCX: ffff888109038000
RDX: ffff888109038000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffff888109038000 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000000 R12: 00000000fffffff1
R13: dffffc0000000000 R14: ffff8880374d5800 R15: ffff888106d98000
FS:  00007f15c3d186c0(0000) GS:ffff8881a3c26000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f15c3d17fc8 CR3: 0000000036d00000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 qdisc_tree_reduce_backlog+0x1b2/0x480
 fq_pie_change+0x9f3/0xea0
 fq_pie_init+0x38d/0x840
 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: 0033:0x7f15c2f8e9a9
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:00007f15c3d18038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f15c31b6160 RCX: 00007f15c2f8e9a9
RDX: 0000000000000000 RSI: 00002000000007c0 RDI: 0000000000000003
RBP: 00007f15c3010ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f15c31b6160 R15: 00007fff7bbee3e8
 </TASK>
