System crash when writing back dirty pages in VxFS

Issue

• Server crashes when writing back an inode and its dirty pages in VxFS (Veritas File System) with the following stack trace:

PID: 48041  TASK: ffff8801a77aaf10  CPU: 8   COMMAND: "kworker/u97:1"
 #0 [ffff88000818f778] machine_kexec at ffffffff8105bb5b
 #1 [ffff88000818f7d8] __crash_kexec at ffffffff8110a7d2
 #2 [ffff88000818f8a8] crash_kexec at ffffffff8110a8c0
 #3 [ffff88000818f8c0] oops_end at ffffffff8169d7c8
 #4 [ffff88000818f8e8] no_context at ffffffff8168ccac
 #5 [ffff88000818f938] __bad_area_nosemaphore at ffffffff8168cd42
 #6 [ffff88000818f980] bad_area_nosemaphore at ffffffff8168ceac
 #7 [ffff88000818f990] __do_page_fault at ffffffff816a064e
 #8 [ffff88000818f9f0] do_page_fault at ffffffff816a07f5
 #9 [ffff88000818fa20] page_fault at ffffffff8169c758
    [exception RIP: vx_putpage1+496]
    RIP: ffffffffa09457a0  RSP: ffff88000818fad0  RFLAGS: 00010046
    RAX: 0000000000000206  RBX: ffff880c6fa0ec00  RCX: 0000000000008c24
    RDX: 0000000000000000  RSI: 0000000000008c24  RDI: ffff880c6fa0ee80
    RBP: ffff88000818fb20   R8: ffff880b8a637b00   R9: ffff88000818fb68
    R10: 0000000000002400  R11: 0000000000000000  R12: 8000000000000000
    R13: ffff88079f238000  R14: 0000000000000000  R15: ffff88079f238558
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
#10 [ffff88000818fb28] vx_writepages at ffffffffa0915811 [vxfs]
#11 [ffff88000818fbb8] do_writepages at ffffffff81192fe1
#12 [ffff88000818fbc8] __writeback_single_inode at ffffffff8122f110
#13 [ffff88000818fc08] writeback_sb_inodes at ffffffff8122fe5e
#14 [ffff88000818fcb0] __writeback_inodes_wb at ffffffff812300cf
#15 [ffff88000818fcf8] wb_writeback at ffffffff81230913
#16 [ffff88000818fd70] bdi_writeback_workfn at ffffffff8123280c
#17 [ffff88000818fe20] process_one_work at ffffffff810acae0
#18 [ffff88000818fe68] worker_thread at ffffffff810ad916
#19 [ffff88000818fec8] kthread at ffffffff810b5191
#20 [ffff88000818ff50] ret_from_fork at ffffffff816a501d