Issue

• VMware 仮想プラットフォームで実行しているシステムがクラッシュし、以下のトレースが生成されました。

Unable to handle kernel paging request at ffff810a8bf3fff8 RIP: 
 [<ffffffff8844143e>] :vmmemctl:Balloon_QueryAndExecute+0x8ae/0x9cc
PGD 10063 PUD 0 
Oops:0000 [1] SMP 
last sysfs file:/devices/pci0000:00/0000:00:00.0/irq
.....
Call Trace:
 [<ffffffff88440bf7>] :vmmemctl:Balloon_QueryAndExecute+0x67/0x9cc
 [<ffffffff88440716>] :vmmemctl:OS_UnmapPage+0x102/0x2a0
 [<ffffffff800a3f62>] autoremove_wake_function+0x0/0x2e
 [<ffffffff800a3f62>] autoremove_wake_function+0x0/0x2e
 [<ffffffff8844061c>] :vmmemctl:OS_UnmapPage+0x8/0x2a0
 [<ffffffff80032c68>] kthread+0xfe/0x132
 [<ffffffff8005dfc1>] child_rip+0xa/0x11
 [<ffffffff800a3d4a>] keventd_create_kthread+0x0/0xc4
 [<ffffffff80032b6a>] kthread+0x0/0x132
 [<ffffffff8005dfb7>] child_rip+0x0/0x11

Code:49 8b 3c d4 75 37 49 8d 8c 24 48 1f 00 00 49 8b b4 24 48 1f 
RIP  [<ffffffff8844143e>] :vmmemctl:Balloon_QueryAndExecute+0x8ae/0x9cc
 RSP <ffff81043a61fe30>