5、这里再次bt 命令来看一下堆栈
crash> bt PID: 1362 TASK: ffff90f972365280 CPU: 5 COMMAND: "AliYunDun" #0 [ffff90f9767a77a0] machine_kexec at ffffffff922662c4 #1 [ffff90f9767a7800] __crash_kexec at ffffffff923227a2 #2 [ffff90f9767a78d0] crash_kexec at ffffffff92322890 #3 [ffff90f9767a78e8] oops_end at ffffffff9298c798 #4 [ffff90f9767a7910] no_context at ffffffff92275d14 #5 [ffff90f9767a7960] __bad_area_nosemaphore at ffffffff92275fe2 #6 [ffff90f9767a79b0] bad_area_nosemaphore at ffffffff92276104 #7 [ffff90f9767a79c0] __do_page_fault at ffffffff9298f750 #8 [ffff90f9767a7a30] trace_do_page_fault at ffffffff9298fa26 #9 [ffff90f9767a7a70] do_async_page_fault at ffffffff9298efa2 #10 [ffff90f9767a7a90] async_page_fault at ffffffff9298b7a8 #11 [ffff90f9767a7b98] kmem_cache_alloc_trace at ffffffff92428a0c #12 [ffff90f9767a7c98] mntput at ffffffff92471d94 #13 [ffff90f9767a7d88] kvm_sched_clock_read at ffffffff9226d3be #14 [ffff90f9767a7ec8] putname at ffffffff9245fd3d #15 [ffff90f9767a7f50] system_call_fastpath at ffffffff92994f92 RIP: 00007f84fd928315 RSP: 00007f84fb011af8 RFLAGS: 00000206 RAX: 000000000000004e RBX: 000000000244e010 RCX: ffffffffffffffff RDX: 0000000000008000 RSI: 000000000244e010 RDI: 0000000000000012 RBP: 000000000244e010 R8: 0000000000000020 R9: 0000000000008030 R10: 0000000000000076 R11: 0000000000000246 R12: ffffffffffffff30 R13: 0000000000000000 R14: 000000000244dfe0 R15: 000000000000052a ORIG_RAX: 000000000000004e CS: 0033 SS: 002b我们看到系统崩溃前的最后一个调用是“#15 [ffff90f9767a7f50] system_call_fastpath at ffffffff92994f92”，现在用 dis 命令来看一下该地址的反汇编结果