rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (10500 ticks this GP) idle=805c/1/0x4000000000000000 softirq=52693/52693 fqs=5249
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     5256          0            0
rcu: 	cputime:      216          0        52273   ==> 52500(ms)
rcu: 	(t=10502 jiffies g=29921 q=2254 ncpus=2)
CPU: 0 UID: 0 PID: 9385 Comm: syz.2.725 Not tainted 6.16.0-rc3-syzkaller-00159-g223e2288f4b8 #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:check_preemption_disabled+0x49/0x120
Code: 8b 0d 3b 2e 36 07 f7 c1 ff ff ff 7f 74 23 65 48 8b 0d 1b 2e 36 07 48 3b 4c 24 08 0f 85 cc 00 00 00 48 83 c4 10 5b 41 5e 41 5f <5d> e9 81 c0 02 00 cc 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24
RSP: 0018:ffffc90001c6ef30 EFLAGS: 00000286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: b6ae35eb3149c000
RDX: ffff88810abe5640 RSI: ffffffff8be28d20 RDI: ffffffff8be28ce0
RBP: 0000000000000001 R08: ffff88810abe5640 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000000 R12: ffff88810b141838
R13: dffffc0000000000 R14: ffff888107e26000 R15: ffff888112ece478
FS:  00007fcbdf80b6c0(0000) GS:ffff8880b8650000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f23269f5440 CR3: 0000000124e26000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 rcu_lockdep_current_cpu_online+0x37/0x120
 rcu_read_lock_held+0x1e/0x50
 qdisc_lookup_rcu+0x32b/0x6d0
 qdisc_tree_reduce_backlog+0x1b2/0x480
 fq_codel_change+0xa96/0xef0
 fq_codel_init+0x355/0x960
 qdisc_create+0x7ac/0xea0
 tc_modify_qdisc+0x1426/0x2010
 rtnetlink_rcv_msg+0x77c/0xb70
 netlink_rcv_skb+0x208/0x470
 netlink_unicast+0x75b/0x8d0
 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: 0033:0x7fcbde98e929
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:00007fcbdf80b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007fcbdebb5fa0 RCX: 00007fcbde98e929
RDX: 040000000000009f RSI: 00002000000002c0 RDI: 0000000000000004
RBP: 00007fcbdea10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fcbdebb5fa0 R15: 00007ffd1c8627e8
 </TASK>
