rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=8324/1/0x4000000000000000 softirq=20874/20875 fqs=0
rcu: 	(detected by 0, t=10506 jiffies, g=14945, q=281 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 7413 Comm: syz.2.479 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:check_preemption_disabled+0x1e/0x120
Code: 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 be 4e 26 07 48 89 44 24 08 65 8b 05 c6 4e 26 07 <65> 8b 0d bb 4e 26 07 f7 c1 ff ff ff 7f 74 23 65 48 8b 0d 9b 4e 26
RSP: 0018:ffffc900001e0000 EFLAGS: 00000086
RAX: 0000000000000001 RBX: 0000000000000806 RCX: ffff888108af5640
RDX: 0000000000010100 RSI: ffffffff8be33de0 RDI: ffffffff8be33da0
RBP: ffffc900001e0158 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff5200003c008 R12: dffffc0000000000
R13: ffffffff81ada91e R14: ffff888136627a98 R15: 1ffff9200003c018
FS:  00007f50c67a46c0(0000) GS:ffff8881a3c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3b62b9 CR3: 0000000115df0000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 rcu_is_watching+0x15/0xb0
 lock_release+0x4b/0x3e0
 _raw_spin_unlock_irqrestore+0x70/0x110
 hrtimer_try_to_cancel+0x3be/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+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x11/0x90
Code: cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 14 25 08 d0 a0 92 <65> 8b 0d d8 0a e1 10 81 e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75
RSP: 0018:ffffc900001e0920 EFLAGS: 00000246
RAX: ffffffff84febb08 RBX: dffffc0000000000 RCX: 0000000000000100
RDX: ffff888108af5640 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff895b8c12
R10: 000000000000000c R11: ffffffff81ac4d00 R12: 0000000001e903ae
R13: 0000000001e90372 R14: 000000000000003c R15: ffff8881093ed001
 dql_completed+0x1a8/0xbf0
 e1000_clean+0x851/0x2b00
 __napi_poll+0xc7/0x360
 net_rx_action+0x707/0xe30
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 common_interrupt+0xbb/0xe0
 </IRQ>
 <TASK>
 asm_common_interrupt+0x26/0x40
RIP: 0010:_raw_spin_unlock_irqrestore+0xa8/0x110
Code: 74 05 e8 cb 6b 4a f6 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4f f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 <e8> e3 10 13 f6 65 8b 05 6c d1 23 07 85 c0 74 40 48 c7 04 24 0e 36
RSP: 0018:ffffc900099576c0 EFLAGS: 00000206
RAX: adb23d71a3773d00 RBX: 0000000000000a06 RCX: adb23d71a3773d00
RDX: 0000000000000006 RSI: ffffffff8d9ba2bf RDI: 0000000000000001
RBP: ffffc90009957758 R08: ffffffff8fa3a937 R09: 1ffffffff1f47526
R10: dffffc0000000000 R11: fffffbfff1f47527 R12: dffffc0000000000
R13: 1ffff110226a202d R14: ffff888113510100 R15: 1ffff9200132aed8
 __skb_try_recv_datagram+0x17c/0x4e0
 __unix_dgram_recvmsg+0x20f/0xd60
 sock_recvmsg+0x22c/0x270
 ____sys_recvmsg+0x1c9/0x460
 ___sys_recvmsg+0x1b5/0x510
 __x64_sys_recvmsg+0x198/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f50c598eba9
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:00007f50c67a4038 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007f50c5bd5fa0 RCX: 00007f50c598eba9
RDX: 0000000000000000 RSI: 0000200000000400 RDI: 0000000000000007
RBP: 00007f50c5a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f50c5bd6038 R14: 00007f50c5bd5fa0 R15: 00007fff88f68888
 </TASK>
rcu: rcu_preempt kthread starved for 10506 jiffies! g14945 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R  running task     stack:27304 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: 0 UID: 0 PID: 7412 Comm: syz.2.479 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_single+0x3a9/0x590
Code: 33 44 89 f6 83 e6 01 31 ff e8 23 7a 0b 00 41 83 e6 01 75 11 e8 d8 75 0b 00 4d 89 fe eb 3f e8 ce 75 0b 00 eb 3c 4d 89 fe f3 90 <43> 0f b6 04 2c 84 c0 75 0f f7 03 01 00 00 00 74 1d e8 b1 75 0b 00
RSP: 0018:ffffc90009a37a40 EFLAGS: 00000293
RAX: ffffffff81b44b4f RBX: ffffc90009a37a88 RCX: ffff88810d013980
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90009a37b30 R08: ffffffff8fa3a937 R09: 1ffffffff1f47526
R10: dffffc0000000000 R11: ffffffff81706100 R12: 1ffff92001346f51
R13: dffffc0000000000 R14: 1ffff92001346f4c R15: 1ffff92001346f4c
FS:  000055558f545500(0000) GS:ffff8880b8613000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000029c0 CR3: 0000000115df0000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 event_function_call+0x326/0x970
 perf_event_release_kernel+0x15d/0x510
 perf_release+0x38/0x50
 __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: 0033:0x7f50c598eba9
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:00007fff88f689e8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f50c5bd7da0 RCX: 00007f50c598eba9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f50c5bd7da0 R08: 000000000000021c R09: 0000001e88f68cdf
R10: 00007f50c5bd7cb0 R11: 0000000000000246 R12: 000000000001aa1e
R13: 00007f50c5bd6090 R14: ffffffffffffffff R15: 00007fff88f68b00
 </TASK>
