Issue

• System panic in ps while reading /proc

crash> bt
PID: 19823  TASK: ffff882ff03f3520  CPU: 15  COMMAND: "ps"
 #0 [ffff882a937b1890] machine_kexec at ffffffff8103b60b
 #1 [ffff882a937b18f0] crash_kexec at ffffffff810c99a2
 #2 [ffff882a937b19c0] oops_end at ffffffff8152e8e0
 #3 [ffff882a937b19f0] no_context at ffffffff8104c80b
 #4 [ffff882a937b1a40] __bad_area_nosemaphore at ffffffff8104ca95
 #5 [ffff882a937b1a90] bad_area at ffffffff8104cbbe
 #6 [ffff882a937b1ac0] __do_page_fault at ffffffff8104d3c3
 #7 [ffff882a937b1be0] do_page_fault at ffffffff8153082e
 #8 [ffff882a937b1c10] page_fault at ffffffff8152dbd5
    [exception RIP: task_tgid_nr_ns+9]
    RIP: ffffffff810999f9  RSP: ffff882a937b1cc8  RFLAGS: 00010286
    RAX: 0000000000000000  RBX: ffff882fefc0d9c0  RCX: 0000000000000001
    RDX: 0000000000000000  RSI: ffffffff81aa63e0  RDI: 000000000000000d
    RBP: ffff882a937b1cc8   R8: 0000000000000ff4   R9: 0000000000000000
    R10: 0000000000000001  R11: 0000000000000246  R12: ffff882fe7c0d520
    R13: ffff882a937b1dce  R14: ffffffff81aa63e0  R15: 0000000000000000
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
 #9 [ffff882a937b1cd0] proc_pid_status at ffffffff81201a40
#10 [ffff882a937b1e20] proc_single_show at ffffffff811fd274
#11 [ffff882a937b1e70] seq_read at ffffffff811b4252
#12 [ffff882a937b1ef0] vfs_read at ffffffff8118ecd5
#13 [ffff882a937b1f30] sys_read at ffffffff8118ee11
#14 [ffff882a937b1f80] system_call_fastpath at ffffffff8100b0d2
    RIP: 0000003dd66db4c0  RSP: 00007ffd6a7cfb50  RFLAGS: 00000246
    RAX: 0000000000000000  RBX: ffffffff8100b0d2  RCX: 0000000000000000
    RDX: 00000000000003ff  RSI: 0000003dd6c118c0  RDI: 0000000000000005  <--- file number
    RBP: 0000000000000005   R8: 0000000000000000   R9: 0000003dd6a0be08
    R10: 0000000000000000  R11: 0000000000000246  R12: 0000000000000020
    R13: 0000000000815410  R14: 0000003dd6c118c0  R15: 0000000000815410
    ORIG_RAX: 0000000000000000  CS: 0033  SS: 002b

crash> files
PID: 19823  TASK: ffff882ff03f3520  CPU: 15  COMMAND: "ps"
ROOT: /    CWD: /
 FD       FILE            DENTRY           INODE       TYPE PATH
  0 ffff882a84b35300 ffff882a0b1c16c0 ffff88302bfe5c58 FIFO 
  1 ffff882a56535680 ffff882ff385ee40 ffff882a6dc870c8 FIFO 
  2 ffff882ff13cd8c0 ffff883027498240 ffff883047019048 FIFO 
  3 ffff8830351e2480 ffff882e8d7cfe40 ffff882a0b244598 REG  /proc/meminfo
  4 ffff882a35d7b900 ffff88185b800a40 ffff88305b802078 DIR  /proc/
  5 ffff882a901a09c0 ffff882e86489080 ffff882ce3c62078 REG  /proc/22321/status   <--- file