内核由于 copy_from_kernel_nofault（）中的一个捕获的异常触发的一个错误 MCE 而崩溃了，其中 pagefault_disable（）有效

Issue

• 内核由于 copy_from_kernel_nofault（）中的一个捕获的异常触发的一个错误 MCE 而崩溃了。

[4847907.480421] mce: [Hardware Error]: CPU 6: Machine Check Exception: 5 Bank 1: bf80000000200401
[4847907.481951] mce: [Hardware Error]: RIP !INEXACT! 33:<000000000041b44e> 
[4847907.483385] mce: [Hardware Error]: TSC 1122db98c46121c ADDR fee00340 MISC 86 PPIN 87907f512e31b079 
[4847907.484815] mce: [Hardware Error]: PROCESSOR 0:50654 TIME 1739820952 SOCKET 0 APIC 22 microcode 2007006
[4847907.486234] mce: [Hardware Error]: Run the above through 'mcelog --ascii'
[4847907.513347] mce: [Hardware Error]: Machine check: Processor context corrupt
[4847907.514747] Kernel panic - not syncing: Fatal machine check

PID: 903233   TASK: ffff9daad8a6a380  CPU: 6    COMMAND: "kubelet"
 #0 [ffffb27ea5c8bc60] machine_kexec at ffffffff9c86c767
 #1 [ffffb27ea5c8bcb8] __crash_kexec at ffffffff9c9c58ca
 #2 [ffffb27ea5c8bd78] panic at ffffffff9d2dfe3e
 #3 [ffffb27ea5c8bdf8] mce_panic.cold at ffffffff9d2dab6a
 #4 [ffffb27ea5c8be38] do_machine_check at ffffffff9d32f800
 #5 [ffffb27ea5c8bf38] noist_exc_machine_check at ffffffff9d32f97a
 #6 [ffffb27ea5c8bf50] asm_exc_machine_check at ffffffff9d400bff
    RIP: 000000000041b44e  RSP: 00007ff6fb7fdc58  RFLAGS: 00000206
    RAX: 000000c01ea0f5c0  RBX: 000000c01c13c030  RCX: 0000000000000000
    RDX: 00007ff81409f1e8  RSI: 000000c01ea0f501  RDI: 0000000000000006
    RBP: 00007ff6fb7fdc80   R8: 0000000000000000   R9: 00000000028d3590
    R10: 000000c01ea0f5c0  R11: 0000000000000002  R12: 00007ff6fb7fdd10
    R13: 000000000000000f  R14: 000000c0228369c0  R15: 0000000006ca01a0
    ORIG_RAX: ffffffffffffffff  CS: 0033  SS: 002b

PID: 9986     TASK: ffff9daa80350000  CPU: 42   COMMAND: "kubelet"
 #0 [fffffe00008bde58] crash_nmi_callback at ffffffff9c85ea5e
 #1 [fffffe00008bde60] nmi_handle at ffffffff9c8298db
 #2 [fffffe00008bdea8] default_do_nmi at ffffffff9d32ea80
 #3 [fffffe00008bdec8] exc_nmi at ffffffff9d32ec8d
 #4 [fffffe00008bdef0] end_repeat_nmi at ffffffff9d4015eb
    [exception RIP: __const_udelay+13]
    RIP: ffffffff9cdc523d  RSP: fffffe00008c1e08  RFLAGS: 00000202
    RAX: 01122db992a95b82  RBX: 00000000004c26c7  RCX: 000000000000002a
    RDX: 00000000002dc6c0  RSI: 000000000000002a  RDI: 00000000000010c7
    RBP: fffffe00008c1f58   R8: 000000000000002a   R9: 0000000000000bb9
    R10: 000000000000003e  R11: 0000000000000004  R12: 0000000000000001
    R13: 0000000000000002  R14: fffffe00008c1e58  R15: 0000000000000002
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
 #5 [fffffe00008c1e08] __const_udelay at ffffffff9cdc523d
 #6 [fffffe00008c1e08] wait_for_panic at ffffffff9c8432ed
 #7 [fffffe00008c1e18] mce_timed_out at ffffffff9c843cc8
 #8 [fffffe00008c1e30] do_machine_check at ffffffff9d32f3f4
 #9 [fffffe00008c1f30] exc_machine_check at ffffffff9d32f905
#10 [fffffe00008c1f50] asm_exc_machine_check at ffffffff9d400bea
    [exception RIP: copy_from_kernel_nofault+62]
    RIP: ffffffff9cae2c8e  RSP: ffffb27d39d6fd70  RFLAGS: 00000202
    RAX: ffffffffffffffff  RBX: ffffffffff5fc34b  RCX: 0000000000000010
    RDX: 0000000000000008  RSI: 0000000000000008  RDI: ffffffffff5fc34b
    RBP: ffffb27d39d6fdf0   R8: 0000000000000001   R9: 0000000000000000
    R10: 0000000000000001  R11: ffff9daa80350010  R12: 0000000000000008
    R13: 00000000f2c0f300  R14: 0000000000000000  R15: ffffb27d39d6fe78
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
#11 [ffffb27d39d6fd70] copy_from_kernel_nofault at ffffffff9cae2c8e
#12 [ffffb27d39d6fd88] bpf_probe_read_kernel at ffffffff9ca4d258
#13 [ffffb27d39d6fe00] copy_from_kernel_nofault at ffffffff9cae2c6d
#14 [ffffb27d39d6fe20] bpf_probe_read_kernel at ffffffff9ca4d258
#15 [ffffb27d39d6fe88] bpf_trace_run2 at ffffffff9ca4e1d6
#16 [ffffb27d39d6feb8] syscall_exit_work at ffffffff9c999740
#17 [ffffb27d39d6fed0] syscall_exit_to_user_mode at ffffffff9d330d09
#18 [ffffb27d39d6fee0] do_syscall_64 at ffffffff9d32d169
#19 [ffffb27d39d6ff50] entry_SYSCALL_64_after_hwframe at ffffffff9d4000dc
    RIP: 00000000004279ae  RSP: 00007ff8557f9c90  RFLAGS: 00000202
    RAX: 000000c01e581e60  RBX: 0000000000000090  RCX: 0000000000028000
    RDX: 000000c01e581e60  RSI: 0000000000000090  RDI: 0000000000000012
    RBP: 00007ff8557f9d10   R8: 0000000000000068   R9: 0000000000000000
    R10: 0000000000000015  R11: 0000000000000028  R12: 0000000000000020
    R13: 0000000000000009  R14: 000000c0019821a0  R15: 0000000000000001
    ORIG_RAX: ffffffffffffffff  CS: 0033  SS: 002b