rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (10499 ticks this GP) idle=a90c/1/0x4000000000000000 softirq=50328/50330 fqs=5198
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     7239          0            0
rcu: 	cputime:      207          0        52272   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=32701 q=2402 ncpus=2)
CPU: 1 UID: 0 PID: 13585 Comm: syz.2.2379 Not tainted 6.16.0-rc6-syzkaller-00135-gcf074eca0065-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:check_preemption_disabled+0x17/0x120
Code: 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 53 48 83 ec 10 65 48 8b 05 ee 2d 32 07 48 89 44 24 08 <65> 8b 05 f6 2d 32 07 65 8b 0d eb 2d 32 07 f7 c1 ff ff ff 7f 74 23
RSP: 0018:ffffc900029cf008 EFLAGS: 00000282
RAX: 178bc4b712930e00 RBX: 0000000000000000 RCX: ffff888114fa5640
RDX: ffff888114fa5640 RSI: ffffffff8be28be0 RDI: ffffffff8be28ba0
RBP: 0000000000000001 R08: ffff888114fa5640 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000002 R12: ffff88810807b838
R13: dffffc0000000000 R14: ffff888023be9400 R15: ffff8881074fc478
FS:  00007f806792a6c0(0000) GS:ffff8881a3c23000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2aca234fc8 CR3: 0000000021e62000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 rcu_is_watching+0x15/0xb0
 rcu_read_lock_held+0x15/0x50
 qdisc_lookup_rcu+0x32b/0x6d0
 qdisc_tree_reduce_backlog+0x1b2/0x480
 pie_change+0x96d/0xca0
 pie_init+0x2a3/0x3f0
 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: 0033:0x7f8066b8e9a9
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:00007f806792a038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f8066db5fa0 RCX: 00007f8066b8e9a9
RDX: 0000000000000000 RSI: 00002000000012c0 RDI: 0000000000000003
RBP: 00007f8066c10d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8066db5fa0 R15: 00007ffe572ece08
 </TASK>
