I confirm this bug. After updating orange pi zero to 4.14.15-sunxi it hangs occasionally.
Feb 4 06:32:27 localhost kernel: [24810.496488] NMI backtrace for cpu 0
Feb 4 06:32:27 localhost kernel: [24810.496498] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.14.15-sunxi #28
Feb 4 06:32:27 localhost kernel: [24810.496501] Hardware name: Allwinner sun8i Family
Feb 4 06:32:27 localhost kernel: [24810.496506] task: c0d07780 task.stack: c0d00000
Feb 4 06:32:27 localhost kernel: [24810.496523] PC is at arch_cpu_idle+0x28/0x2c
Feb 4 06:32:27 localhost kernel: [24810.496529] LR is at arch_cpu_idle+0x27/0x2c
Feb 4 06:32:27 localhost kernel: [24810.496533] pc : [<c01070e8>] lr : [<c01070e7>] psr: 40070033
Feb 4 06:32:27 localhost kernel: [24810.496536] sp : c0d01f80 ip : 00000018 fp : c0c5ea30
Feb 4 06:32:27 localhost kernel: [24810.496539] r10: 00000000 r9 : 00000000 r8 : c0ddd8eb
Feb 4 06:32:27 localhost kernel: [24810.496544] r7 : c0cb6438 r6 : c0d03f6c r5 : c0d03fcc r4 : ffffe000
Feb 4 06:32:27 localhost kernel: [24810.496547] r3 : c0116561 r2 : 00000000 r1 : 00000000 r0 : 00000001
Feb 4 06:32:27 localhost kernel: [24810.496554] Flags: nZcv IRQs on FIQs on Mode SVC_32 ISA Thumb Segment none
Feb 4 06:32:27 localhost kernel: [24810.496558] Control: 50c5387d Table: 5a21006a DAC: 00000051
Feb 4 06:32:27 localhost kernel: [24810.496564] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.14.15-sunxi #28
Feb 4 06:32:27 localhost kernel: [24810.496566] Hardware name: Allwinner sun8i Family
Feb 4 06:32:27 localhost kernel: [24810.496592] [<c010db15>] (unwind_backtrace) from [<c010a0d9>] (show_stack+0x11/0x1
4)
Feb 4 06:32:27 localhost kernel: [24810.496605] [<c010a0d9>] (show_stack) from [<c0867e49>] (dump_stack+0x69/0x78)
Feb 4 06:32:27 localhost kernel: [24810.496621] [<c0867e49>] (dump_stack) from [<c086bc0f>] (nmi_cpu_backtrace+0x8b/0x
d4)
Feb 4 06:32:27 localhost kernel: [24810.496634] [<c086bc0f>] (nmi_cpu_backtrace) from [<c010ca01>] (handle_IPI+0x75/0x
278)
Feb 4 06:32:27 localhost kernel: [24810.496645] [<c010ca01>] (handle_IPI) from [<c01013e3>] (gic_handle_irq+0x67/0x68)
Feb 4 06:32:27 localhost kernel: [24810.496654] [<c01013e3>] (gic_handle_irq) from [<c010aa25>] (__irq_svc+0x65/0x94)
Feb 4 06:32:27 localhost kernel: [24810.496659] Exception stack(0xc0d01f30 to 0xc0d01f78)
Feb 4 06:32:27 localhost kernel: [24810.496666] 1f20: 00000001 00000000 00000000 c
0116561
Feb 4 06:32:27 localhost kernel: [24810.496675] 1f40: ffffe000 c0d03fcc c0d03f6c c0cb6438 c0ddd8eb 00000000 00000000 c
0c5ea30
Feb 4 06:32:27 localhost kernel: [24810.496682] 1f60: 00000018 c0d01f80 c01070e7 c01070e8 40070033 ffffffff
Feb 4 06:32:27 localhost kernel: [24810.496693] [<c010aa25>] (__irq_svc) from [<c01070e8>] (arch_cpu_idle+0x28/0x2c)
Feb 4 06:32:27 localhost kernel: [24810.496708] [<c01070e8>] (arch_cpu_idle) from [<c014c93d>] (do_idle+0x115/0x16c)
Feb 4 06:32:27 localhost kernel: [24810.496721] [<c014c93d>] (do_idle) from [<c014cb89>] (cpu_startup_entry+0x19/0x1c)
Feb 4 06:32:27 localhost kernel: [24810.496733] [<c014cb89>] (cpu_startup_entry) from [<c0c00ad5>] (start_kernel+0x353
/0x36a)
Feb 4 06:32:27 localhost kernel: [24810.497496] rcu_sched kthread starved for 6304 jiffies! g12210 c12209 f0x0 RCU_GP_
WAIT_FQS(3) ->state=0x402 ->cpu=0
Feb 4 06:32:27 localhost kernel: [24810.497502] rcu_sched I 0 8 2 0x00000000
Feb 4 06:32:27 localhost kernel: [24810.497523] [<c08762d9>] (__schedule) from [<c087684f>] (schedule+0x2f/0x68)
Feb 4 06:32:27 localhost kernel: [24810.497538] [<c087684f>] (schedule) from [<c08790ed>] (schedule_timeout+0x75/0x314
)
Feb 4 06:32:27 localhost kernel: [24810.497555] [<c08790ed>] (schedule_timeout) from [<c0164f95>] (rcu_gp_kthread+0x41
5/0x674)
Feb 4 06:32:27 localhost kernel: [24810.497572] [<c0164f95>] (rcu_gp_kthread) from [<c0131a9d>] (kthread+0xfd/0x104)
Feb 4 06:32:27 localhost kernel: [24810.497587] [<c0131a9d>] (kthread) from [<c0106719>] (ret_from_fork+0x11/0x38)
Feb 4 06:32:50 localhost kernel: [24833.077001] INFO: rcu_sched detected stalls on CPUs/tasks:
Feb 4 06:32:50 localhost kernel: [24833.077650] 0-...: (0 ticks this GP) idle=252/140000000000000/0 softirq=212
452/212452 fqs=0
Feb 4 06:32:50 localhost kernel: [24833.077743] (detected by 3, t=2102 jiffies, g=12216, c=12215, q=2956)
Feb 4 06:32:50 localhost kernel: [24833.077921] Sending NMI from CPU 3 to CPUs 0: