rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	1-...!: (10499 ticks this GP) idle=ac74/1/0x4000000000000000 softirq=226988/226989 fqs=0
rcu: 	(t=10500 jiffies g=238733 q=425 ncpus=2)
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g238733 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=106049
rcu: rcu_preempt kthread starved for 10500 jiffies! g238733 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
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:27480 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_timeout+0x158/0x2c0
 rcu_gp_fqs_loop+0x312/0x11d0
 rcu_gp_kthread+0x9e/0x2b0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5532 Comm: sshd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__lock_acquire+0x84a/0x2cf0
Code: 03 81 e5 00 60 00 00 09 c5 48 89 d8 48 c1 e8 20 29 c5 89 c1 c1 c1 04 31 e9 01 d8 29 cb 89 ca c1 c2 06 31 da 01 c1 29 d0 89 d6 <c1> c6 08 31 c6 01 ca 29 f1 89 f3 c1 c3 10 31 cb 01 d6 29 da 89 dd
RSP: 0018:ffffc90000007248 EFLAGS: 00000897
RAX: 00000000dc6b287b RBX: 00000000d043f7c6 RCX: 00000000aa66ded3
RDX: 0000000088984797 RSI: 0000000088984797 RDI: ffff88811289d880
RBP: 00000000b0a3f675 R08: ffffffff84bcb8e3 R09: ffffffff9a717590
R10: dffffc0000000000 R11: fffff52000000e8c R12: ffff88811289e460
R13: ffff88811289e460 R14: ffff88811289d880 R15: 0000000000000002
FS:  00007fd3a168f800(0000) GS:ffff88818dc91000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007efc4d0a1897 CR3: 000000017160e000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 lock_acquire+0x106/0x350
 _raw_spin_lock_irqsave+0x40/0x60
 debug_object_activate+0x83/0x580
 enqueue_hrtimer+0xa9/0x2c0
 __hrtimer_run_queues+0x4d2/0xa20
 hrtimer_interrupt+0x44b/0x950
 __sysvec_apic_timer_interrupt+0x102/0x430
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:inet_gro_receive+0x712/0xcc0
Code: 05 08 36 f3 05 01 48 c7 c7 40 74 e9 8c be d2 05 00 00 48 c7 c2 60 7a e9 8c e8 8a 80 7a f7 e9 a6 fa ff ff e8 30 3c 9e f7 eb 05 <e8> 29 3c 9e f7 8b 5c 24 14 0b 5c 24 54 49 8d 6d 3c 48 89 e8 48 c1
RSP: 0018:ffffc900000077c0 EFLAGS: 00000246
RAX: 1ffff1102d282a2f RBX: 00000000450005dc RCX: 0000000000000100
RDX: 0000000045000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffff888169415178 R08: ffff88811289d880 R09: 0000000000000002
R10: 0000000000000002 R11: 0000000000000100 R12: dffffc0000000000
R13: ffff888063416600 R14: ffff888109c216d2 R15: ffff888169415178
 dev_gro_receive+0x1e19/0x23c0
 gro_receive_skb+0x430/0xce0
 e1000_clean_rx_irq+0x980/0x11a0
 e1000_clean+0xe8f/0x2a90
 __napi_poll+0xae/0x340
 net_rx_action+0x627/0xf70
 handle_softirqs+0x22a/0x840
 do_softirq+0x76/0xd0
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf8/0x130
 tcp_sendmsg+0x39/0x50
 sock_write_iter+0x406/0x4f0
 vfs_write+0x61d/0xb90
 ksys_write+0x150/0x270
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd3a1316bf2
Code: 89 c7 48 89 44 24 08 e8 7b 34 fa ff 48 8b 44 24 08 48 83 c4 28 c3 c3 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 6f 48 8b 15 07 a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffc29340368 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000000005c RCX: 00007fd3a1316bf2
RDX: 000000000000005c RSI: 000056525c0a9e70 RDI: 0000000000000004
RBP: 000056525c0880e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000565254863aa4
R13: 00000000000005ef R14: 00005652548643e8 R15: 00007ffc293403d8
 </TASK>
CPU: 1 UID: 0 PID: 31985 Comm: syz.1.6719 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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+0xfd4/0x13d0
Code: 89 ee 83 e6 01 31 ff e8 fa fc 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 a5 f8 0b 00 eb 37 f3 90 43 0f b6 04 2c <84> c0 75 10 41 f7 06 01 00 00 00 74 1e e8 8a f8 0b 00 eb e5 44 89
RSP: 0018:ffffc90009d2fae0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff88823c63c2c8 RCX: 0000000000080000
RDX: ffffc90024125000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc90009d2fc10 R08: ffffffff9030b2f7 R09: 1ffffffff206165e
R10: dffffc0000000000 R11: ffffffff81745300 R12: 1ffff110242085b9
R13: dffffc0000000000 R14: ffff888121042dc8 R15: 0000000000000000
FS:  00007fbd1c58d6c0(0000) GS:ffff8882a9291000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e023ffc CR3: 000000019a72c000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 clock_was_set+0x70a/0x7d0
 do_settimeofday64+0x340/0x570
 __x64_sys_clock_settime+0x253/0x2a0
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbd1b79cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbd1c58d028 EFLAGS: 00000246 ORIG_RAX: 00000000000000e3
RAX: ffffffffffffffda RBX: 00007fbd1ba15fa0 RCX: 00007fbd1b79cdd9
RDX: 0000000000000000 RSI: 0000200000000240 RDI: 0000000000000000
RBP: 00007fbd1b832d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbd1ba16038 R14: 00007fbd1ba15fa0 R15: 00007ffe4fa8ec28
 </TASK>
