Issue

• サーバーが scsi_softirq_done でクラッシュし、以下のスタックトレースが表示されます。

BUG: unable to handle kernel NULL pointer dereference at 0000000000000044
:
.
 #0 [ffff88002f603a60] machine_kexec at ffffffff8103281b
 #1 [ffff88002f603ac0] crash_kexec at ffffffff810ba662
 #2 [ffff88002f603b90] oops_end at ffffffff81501290
 #3 [ffff88002f603bc0] no_context at ffffffff81043bab
 #4 [ffff88002f603c10] __bad_area_nosemaphore at ffffffff81043e35
 #5 [ffff88002f603c60] bad_area_nosemaphore at ffffffff81043f03
 #6 [ffff88002f603c70] __do_page_fault at ffffffff81044661
 #7 [ffff88002f603d90] do_page_fault at ffffffff8150326e
 #8 [ffff88002f603dc0] page_fault at ffffffff81500625
    [exception RIP: scsi_softirq_done+50]
    RIP: ffffffff8136c672  RSP: ffff88002f603e70  RFLAGS:00010282
    RAX:0000000000000018  RBX:0000000000000000  RCX: ffff88002f603ea0
    RDX: ffff88002f603ea0  RSI: ffff880235a54300  RDI: ffff8802392a38a0
    RBP: ffff88002f603e90   R8: ffff88002f613590   R9:00007fff980907e0
    R10:0000000000000000  R11:00000000096981d0  R12: ffffffff81a830a0
    R13:0000000000000000  R14:0000000000000100  R15:0000000000000004
    ORIG_RAX: ffffffffffffffff  CS:0010  SS:0000
 #9 [ffff88002f603e98] blk_done_softirq at ffffffff8125d605
#10 [ffff88002f603ec8] __do_softirq at ffffffff81073ec1
#11 [ffff88002f603f38] call_softirq at ffffffff8100c24c
#12 [ffff88002f603f50] do_softirq at ffffffff8100de85
#13 [ffff88002f603f70] irq_exit at ffffffff81073ca5
#14 [ffff88002f603f80] do_IRQ at ffffffff81505af5