rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-....: (1 GPs behind) idle=ac84/1/0x4000000000000000 softirq=76570/76571 fqs=5219
rcu: 	         hardirqs   softirqs   csw/system
rcu: 	 number:     6933          0            0
rcu: 	cputime:      312          0        52166   ==> 52480(ms)
rcu: 	(t=10500 jiffies g=51669 q=3786 ncpus=2)
CPU: 1 UID: 0 PID: 14880 Comm: syz.0.2415 Not tainted syzkaller #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:lock_is_held_type+0x65/0x190
Code: 85 ef 00 00 00 65 4c 8b 2c 25 08 80 a0 92 41 83 bd ec 0a 00 00 00 0f 85 d8 00 00 00 89 f5 49 89 fe 48 c7 04 24 00 00 00 00 9c <8f> 04 24 4c 8b 24 24 fa 48 c7 c7 87 c9 9c 8d e8 17 17 00 00 65 ff
RSP: 0018:ffffc90007d3efc0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: 47ed83d22cce7900
RDX: ffff888020918000 RSI: 00000000ffffffff RDI: ffffffff8e139f20
RBP: 00000000ffffffff R08: ffff888020918000 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000002 R12: ffff88811b40e838
R13: ffff888020918000 R14: ffffffff8e139f20 R15: ffff8880200a2478
FS:  00007fc0e7f896c0(0000) GS:ffff8881a3c18000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000008 CR3: 000000003fc08000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 qdisc_lookup_rcu+0x32b/0x6d0
 qdisc_tree_reduce_backlog+0x1b2/0x480
 pie_change+0x913/0xc40
 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+0x82f/0x9e0
 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: 0033:0x7fc0e718eba9
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:00007fc0e7f89038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fc0e73d5fa0 RCX: 00007fc0e718eba9
RDX: 0000000000000000 RSI: 0000200000000280 RDI: 0000000000000003
RBP: 00007fc0e7211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc0e73d6038 R14: 00007fc0e73d5fa0 R15: 00007ffd21822688
 </TASK>
