rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	0-...!: (0 ticks this GP) idle=d4c4/1/0x4000000000000000 softirq=24678/24678 fqs=1
rcu: 	(detected by 1, t=10506 jiffies, g=15965, q=808 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 7303 Comm: syz.5.336 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:do_raw_spin_lock+0xdd/0x290
Code: 8b 0c 25 08 e0 a0 92 48 89 4c 24 10 48 39 c8 0f 84 07 01 00 00 4c 8d 6b 08 4d 89 ef 49 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <41> 0f b6 04 07 84 c0 0f 85 58 01 00 00 41 8b 45 00 65 8b 0d af cb
RSP: 0018:ffffc900000077c0 EFLAGS: 00000802
RAX: dffffc0000000000 RBX: ffff88804b027a80 RCX: ffff888109138000
RDX: 0000000000000000 RSI: ffffffff8dbaa3f5 RDI: ffff88804b027a80
RBP: ffffc90000007870 R08: 0000000000000000 R09: ffffffff81ada78b
R10: dffffc0000000000 R11: ffffed1009604f51 R12: ffff88804b027a90
R13: ffff88804b027a88 R14: 1ffff11009604f52 R15: 1ffff11009604f51
FS:  00007ff77acd36c0(0000) GS:ffff8880b8612000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562e12b16068 CR3: 000000003c332000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 _raw_spin_lock_irqsave+0xb3/0xf0
 hrtimer_try_to_cancel+0x22b/0x420
 hrtimer_cancel+0x3b/0x50
 cpu_clock_event_stop+0xd9/0x130
 __perf_event_overflow+0x580/0xe40
 perf_swevent_hrtimer+0x3c5/0x550
 __hrtimer_run_queues+0x4e0/0xc60
 hrtimer_interrupt+0x45b/0xaa0
 __sysvec_apic_timer_interrupt+0x10b/0x410
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__mctp_dev_get+0x80/0x2c0
Code: 49 c1 ec 03 48 b8 f1 f1 f1 f1 04 f3 f3 f3 4b 89 04 2c e8 03 77 54 f6 48 81 c3 60 04 00 00 48 89 d8 48 c1 e8 03 42 80 3c 28 00 <74> 08 48 89 df e8 26 91 b8 f6 48 8b 1b e8 5e b4 0f 00 41 89 c6 31
RSP: 0018:ffffc9000338e880 EFLAGS: 00000246
RAX: 1ffff11021f97c8c RBX: ffff88810fcbe460 RCX: 0000000000080000
RDX: ffffc90026bbf000 RSI: 00000000000074d9 RDI: 00000000000074da
RBP: ffffc9000338e938 R08: 0000000000000000 R09: ffffffff896a318a
R10: dffffc0000000000 R11: ffffffff8b6b59e0 R12: 1ffff92000671d14
R13: dffffc0000000000 R14: ffff88810fcbe000 R15: dffffc0000000000
 mctp_get_link_af_size+0x15/0x50
 if_nlmsg_size+0x6cb/0x840
 rtmsg_ifinfo_build_skb+0x70/0x260
 rtmsg_ifinfo+0x8c/0x1a0
 __dev_notify_flags+0xf4/0x2e0
 netif_change_flags+0xe8/0x1a0
 do_setlink+0xc55/0x41c0
 rtnl_newlink+0x160b/0x1c70
 rtnetlink_rcv_msg+0x7cf/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: 0033:0x7ff779d8ec29
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:00007ff77acd3038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007ff779fd5fa0 RCX: 00007ff779d8ec29
RDX: 0000000000000000 RSI: 0000200000000940 RDI: 0000000000000010
RBP: 00007ff779e11e41 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff779fd6038 R14: 00007ff779fd5fa0 R15: 00007ffcca6d4018
 </TASK>
rcu: rcu_preempt kthread starved for 10500 jiffies! g15965 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:27224 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00004000
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x12b/0x270
 rcu_gp_fqs_loop+0x301/0x1540
 rcu_gp_kthread+0x99/0x390
 kthread+0x711/0x8a0
 ret_from_fork+0x439/0x7d0
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 7283 Comm: syz.3.332 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:smp_call_function_many_cond+0xd44/0x12d0
Code: 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 61 5f 0b 00 eb 38 f3 90 42 0f b6 04 2b 84 c0 75 11 41 f7 04 24 01 00 00 00 <74> 1e e8 45 5f 0b 00 eb e4 44 89 e1 80 e1 07 80 c1 03 38 c1 7c e2
RSP: 0018:ffffc9000354f5a0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 1ffff11009608341 RCX: ffff888022143980
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000354f720 R08: ffffffff8fa3b437 R09: 1ffffffff1f47686
R10: dffffc0000000000 R11: fffffbfff1f47687 R12: ffff88804b041a08
R13: dffffc0000000000 R14: ffff88813663b1c0 R15: 0000000000000000
FS:  000055558959e500(0000) GS:ffff8881a3c12000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fce7043afc8 CR3: 0000000022f50000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x3f/0x80
 smp_text_poke_batch_finish+0x5f9/0x1130
 arch_jump_label_transform_apply+0x1c/0x30
 __static_key_slow_dec_cpuslocked+0xbe/0x140
 static_key_slow_dec+0x45/0x90
 __nf_unregister_net_hook+0x4eb/0x700
 __nft_release_hook+0x60/0x350
 nft_rcv_nl_event+0x26f/0x640
 notifier_call_chain+0x1b6/0x3e0
 blocking_notifier_call_chain+0x6a/0x90
 netlink_release+0x1280/0x1b40
 sock_close+0xc3/0x240
 __fput+0x44c/0xa70
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f46d818ec29
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:00007ffd26a1db48 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f46d83d7da0 RCX: 00007f46d818ec29
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f46d83d7da0 R08: 0000000000000224 R09: 0000001e26a1de3f
R10: 00007f46d83d7cb0 R11: 0000000000000246 R12: 000000000001c57e
R13: 00007f46d83d6090 R14: ffffffffffffffff R15: 00007ffd26a1dc60
 </TASK>
