rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10500 ticks this GP) idle=4474/1/0x4000000000000000 softirq=36775/36775 fqs=0
rcu: 	(t=10500 jiffies g=21317 q=1558 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g21317 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=1 timer-softirq=7759
rcu: rcu_preempt kthread starved for 10500 jiffies! g21317 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:27128 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x16f5/0x4d00
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
CPU: 1 UID: 0 PID: 10193 Comm: syz.1.1242 Not tainted 6.16.0-rc5-syzkaller-00159-g47c84997c686-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_tree_reduce_backlog+0x189/0x480
Code: 04 28 84 c0 0f 85 e9 01 00 00 41 8b 9f e8 00 00 00 49 83 c7 40 4c 89 f8 48 c1 e8 03 80 3c 28 00 74 08 4c 89 ff e8 67 02 ab f8 <4d> 8b 3f 4c 89 f8 48 c1 e8 03 80 3c 28 00 74 08 4c 89 ff e8 4f 02
RSP: 0018:ffffc90002dcf0a8 EFLAGS: 00000246
RAX: 1ffff110073a0808 RBX: 0000000000000000 RCX: 0000000000000002
RDX: ffff88801ffed640 RSI: 0000000000000000 RDI: ffff888039d040e8
RBP: dffffc0000000000 R08: ffff88801ffed640 R09: 0000000000000002
R10: 00000000ffffffff R11: 0000000000000002 R12: 00000000fffffff1
R13: ffff888039d04148 R14: dffffc0000000000 R15: ffff888039d04040
FS:  00007f00eeda56c0(0000) GS:ffff8881a3c1b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f00eeda4fc8 CR3: 0000000106018000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 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: 0033:0x7f00edf8e929
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:00007f00eeda5038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f00ee1b5fa0 RCX: 00007f00edf8e929
RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000004
RBP: 00007f00ee010b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f00ee1b5fa0 R15: 00007ffc17918468
 </TASK>
