PID: 24358  TASK: ffff8801246be660  CPU: 3   COMMAND: "umount"
 #0 [ffff88013225b928] machine_kexec at ffffffff810613ae
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/arch/x86/kernel/machine_kexec_64.c: 343
 #1 [ffff88013225b988] __crash_kexec at ffffffff811160a2
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/kernel/kexec_core.c: 897
 #2 [ffff88013225ba58] crash_kexec at ffffffff81116190
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/./arch/x86/include/asm/atomic.h: 37
 #3 [ffff88013225ba70] oops_end at ffffffff817eb798
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/arch/x86/kernel/dumpstack.c: 201
 #4 [ffff88013225ba98] die at ffffffff81030c0b
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/arch/x86/kernel/dumpstack.c: 280
 #5 [ffff88013225bac8] do_general_protection at ffffffff817eb092
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/arch/x86/kernel/traps.c: 367
 #6 [ffff88013225bb00] general_protection at ffffffff817ea718
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/arch/x86/kernel/entry_64.S: 1429
    [exception RIP: __list_del_entry+41]
    RIP: ffffffff81414549  RSP: ffff88013225bbb0  RFLAGS: 00010007
    RAX: 5a5a5a5a5a5a5a5a  RBX: ffff88012c7f8ff0  RCX: dead000000000200
    RDX: 5a5a5a5a5a5a5a5a  RSI: 0000000000000246  RDI: ffff88012c7f8ff0
    RBP: ffff88013225bbb0   R8: ffe2004b1fe00000   R9: 00000000000005a4
    R10: 0000000000000000  R11: ffff88013225b81e  R12: 0000000000000282
    R13: ffff88013225bc40  R14: ffffffff82378a20  R15: ffffffff81d09de0
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/lib/list_debug.c: 57
 #7 [ffff88013225bbb8] list_del at ffffffff814145fd
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/lib/list_debug.c: 78
 #8 [ffff88013225bbd0] percpu_counter_destroy at ffffffff814211e4
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/include/linux/spinlock.h: 397
 #9 [ffff88013225bbf0] percpu_counter_fixup_free at ffffffff8142122d
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/lib/percpu_counter.c: 29
#10 [ffff88013225bc08] debug_check_no_obj_freed at ffffffff81415af0
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/lib/debugobjects.c: 303
#11 [ffff88013225bc80] free_pages_prepare at ffffffff811bdda6
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/include/linux/mm.h: 2342
#12 [ffff88013225bce0] __free_pages_ok at ffffffff811be279
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/mm/page_alloc.c: 996
#13 [ffff88013225bd08] __free_pages at ffffffff811bec7d
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/mm/page_alloc.c: 3544
#14 [ffff88013225bd18] kfree at ffffffff8121de87
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/mm/slub.c: 3777
#15 [ffff88013225bd48] osd_device_free at ffffffffa0da5daa [osd_ldiskfs]
    /home/green/git/lustre-release/libcfs/include/libcfs/libcfs_debug.h: 126
#16 [ffff88013225bd68] lustre_put_lsi_free at ffffffffa0592f33 [obdclass]
    /home/green/git/lustre-release/lustre/obdclass/obd_mount.c: 749
#17 [ffff88013225bd90] lustre_put_lsi at ffffffffa05933f5 [obdclass]
    /home/green/git/lustre-release/libcfs/include/libcfs/libcfs_debug.h: 126
#18 [ffff88013225bdb0] server_put_super at ffffffffa08e0c49 [ptlrpc]
    /home/green/git/lustre-release/lustre/ptlrpc/../../lustre/target/tgt_mount.c: 1778
#19 [ffff88013225be40] generic_shutdown_super at ffffffff812476ca
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/fs/super.c: 401
#20 [ffff88013225be60] kill_anon_super at ffffffff81247ac2
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/fs/super.c: 961
#21 [ffff88013225be78] lustre_kill_super at ffffffffa11c976b [lustre]
    /home/green/git/lustre-release/lustre/llite/super25.c: 213
#22 [ffff88013225be90] deactivate_locked_super at ffffffff81247ec9
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/fs/super.c: 277
#23 [ffff88013225beb0] deactivate_super at ffffffff81248616
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/fs/super.c: 298
#24 [ffff88013225bec8] cleanup_mnt at ffffffff81268b1f
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/fs/namespace.c: 1172
#25 [ffff88013225bee0] __cleanup_mnt at ffffffff81268bb2
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/fs/namespace.c: 1179
#26 [ffff88013225bef0] task_work_run at ffffffff810b69b5
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/kernel/task_work.c: 89
#27 [ffff88013225bf30] do_notify_resume at ffffffff8102ccb2
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/include/linux/tracehook.h: 196
#28 [ffff88013225bf50] int_signal at ffffffff817f4363
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/arch/x86/kernel/entry_64.S: 701
    RIP: 00007f87e7ecdba7  RSP: 00007ffcc6c80428  RFLAGS: 00000206
    RAX: 0000000000000000  RBX: 00005637b3df4040  RCX: ffffffffffffffff
    RDX: 0000000000000001  RSI: 0000000000000001  RDI: 00005637b3dfd1d0
    RBP: 00005637b3dfd1d0   R8: 003173646d2d6572   R9: 0000000000000011
    R10: 00007ffcc6c7fea0  R11: 0000000000000206  R12: 00007f87e8a4bd78
    R13: 0000000000000001  R14: 00005637b3df4210  R15: 00005637b3df4040
    ORIG_RAX: 00000000000000a6  CS: 0033  SS: 002b