Issue

• You see messages like
  • BUG: scheduling while atomic
  • BUG: unable to handle kernel paging request
  • BUG: unable to handle kernel NULL pointer dereference
  • and maybe others

crash> bt 95327
PID: 95327  TASK: ffff8804cfb98ae0  CPU: 1   COMMAND: "rsync"
 #0 [ffff88012ae27d40] die at ffffffff81010dde
 #1 [ffff88012ae27d70] do_trap at ffffffff8152bc94
 #2 [ffff88012ae27dd0] do_invalid_op at ffffffff8100cf95
 #3 [ffff88012ae27e70] invalid_op at ffffffff8100bf9b
    [exception RIP: do_nmi+0x305]
    RIP: ffffffff8152c245  RSP: ffff88012ae27f28  RFLAGS: 00010002
    RAX: ffff8804c575bfd8  RBX: ffff88012ae27f58  RCX: 00000000c0000101
    RDX: 00000000ffff8801  RSI: ffffffffffffffff  RDI: ffff88012ae27f58
    RBP: ffff88012ae27f48   R8: 0000000000000000   R9: ffffffff81645da0
    R10: 0000000000000001  R11: 0000000000000000  R12: 0000000000000051
    R13: ffffffff81e64287  R14: 0000000000000030  R15: ffff8800000bc1a0
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
 #4 [ffff88012ae27f50] nmi at ffffffff8152b9c0
    [exception RIP: vt_console_print+0x17e]
    RIP: ffffffff81346d9e  RSP: ffff8804c575a898  RFLAGS: 00000012
    RAX: 000000000000002f  RBX: ffff88303feb9e00  RCX: 000000000000004f
    RDX: 000000000000002f  RSI: 0000000000000000  RDI: ffffffff81fe4a28
    RBP: ffff8804c575a8e8   R8: 0000000000000000   R9: ffffffff81645da0
    R10: 0000000000000001  R11: 0000000000000000  R12: 0000000000000051
    R13: ffffffff81e64287  R14: 0000000000000030  R15: ffff8800000bc1a0
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
--- <NMI exception stack> ---
 #5 [ffff8804c575a898] vt_console_print at ffffffff81346d9e
 #6 [ffff8804c575a8f0] __call_console_drivers at ffffffff81071cd5
 #7 [ffff8804c575a920] _call_console_drivers at ffffffff81071d3a
 #8 [ffff8804c575a940] release_console_sem at ffffffff81072388
 #9 [ffff8804c575a980] vprintk at ffffffff81072a88
#10 [ffff8804c575aa20] printk at ffffffff81528235
#11 [ffff8804c575aa80] print_modules at ffffffff810b7827
#12 [ffff8804c575aab0] __schedule_bug at ffffffff8105da46
#13 [ffff8804c575aad0] thread_return at ffffffff81528e30
#14 [ffff8804c575ab90] schedule_timeout at ffffffff815296d5
#15 [ffff8804c575ac40] wait_for_common at ffffffff81529353
#16 [ffff8804c575acd0] wait_for_completion at ffffffff8152946d
#17 [ffff8804c575ace0] vx_bc_biowait at ffffffffa042821d [vxfs]
#18 [ffff8804c575ad00] vx_bread_bp at ffffffffa02b7812 [vxfs]
#19 [ffff8804c575ad40] vx_getblk_cmn at ffffffffa02b8208 [vxfs]
#20 [ffff8804c575adb0] vx_getblk at ffffffffa02b8288 [vxfs]
#21 [ffff8804c575ade0] vx_getmap at ffffffffa02b92e4 [vxfs]
#22 [ffff8804c575ae30] vx_getemap at ffffffffa02ba8e9 [vxfs]
#23 [ffff8804c575ae80] vx_extfind at ffffffffa02929ff [vxfs]
#24 [ffff8804c575af40] vx_searchau_downlevel at ffffffffa0293ce8 [vxfs]
#25 [ffff8804c575afd0] vx_searchau_downlevel at ffffffffa0293db4 [vxfs]
#26 [ffff8804c575b060] vx_searchau_downlevel at ffffffffa0293db4 [vxfs]
#27 [ffff8804c575b0f0] vx_searchau_uplevel at ffffffffa0293f49 [vxfs]
#28 [ffff8804c575b190] vx_searchau at ffffffffa02946bf [vxfs]
#29 [ffff8804c575b280] vx_extentalloc_device at ffffffffa0294dfb [vxfs]
#30 [ffff8804c575b330] vx_extentalloc at ffffffffa0296074 [vxfs]
#31 [ffff8804c575b430] vx_bmap_ext4 at ffffffffa02bf57f [vxfs]
#32 [ffff8804c575b510] vx_bmap_alloc_ext4 at ffffffffa02bfbd3 [vxfs]
#33 [ffff8804c575b550] vx_bmap_alloc at ffffffffa02bb723 [vxfs]
#34 [ffff8804c575b5b0] vx_write_alloc3 at ffffffffa03281e6 [vxfs]
#35 [ffff8804c575b750] vx_tran_write_alloc at ffffffffa0328a4a [vxfs]
#36 [ffff8804c575b7c0] vx_idalloc_off1 at ffffffffa03d2184 [vxfs]
#37 [ffff8804c575b850] vx_idalloc_off at ffffffffa03da201 [vxfs]
#38 [ffff8804c575b8c0] vx_int_rename at ffffffffa04a486c [vxfs]
#39 [ffff8804c575bab0] vx_do_rename at ffffffffa04a6325 [vxfs]
#40 [ffff8804c575bba0] vx_rename1 at ffffffffa04a67db [vxfs]
#41 [ffff8804c575bc60] vx_rename at ffffffffa03a89ad [vxfs]
#42 [ffff8804c575bd20] vfs_rename at ffffffff81197de9  <------------
#43 [ffff8804c575bda0] sys_renameat at ffffffff8119a739
#44 [ffff8804c575bf70] sys_rename at ffffffff8119a7eb
#45 [ffff8804c575bf80] system_call_fastpath at ffffffff8100b072
    RIP: 0000003cf36644d7  RSP: 00007fff2048d778  RFLAGS: 00000286
    RAX: 0000000000000052  RBX: ffffffff8100b072  RCX: 00000000ee44d8d6
    RDX: 0000000000000000  RSI: 00007fff204909e0  RDI: 00007fff2048e9e0
    RBP: 00007fff2048e9e0   R8: 0000000000000000   R9: 0000000000000000
    R10: 0000000000000000  R11: 0000000000000206  R12: ffffffff8119a7eb
    R13: ffff8804c575bf78  R14: 00007fff2048e9e0  R15: 0000000000000003
    ORIG_RAX: 0000000000000052  CS: 0033  SS: 002b
crash>