標題: 「啟動 container 直接 kernel panic 的 bug」
類別: others
連結: https://bugs.launchpad.net/ubuntu/+source/linux-aws-5.13/+bug/1977919
本篇文章探討的是一個關於 Ubuntu kernel(5.13+) bug 產生的各種悲劇，已知受害的雲端業者包含
linux-oracle
linux-azure
linux-gcp
linux-aws
等常見大廠。
簡單來說，預設設定下只要簡單跑一個 container 譬如docker run -it ubuntu bash 就可以直接觸發 kernel panic，直接讓你系統死亡強迫重啟
整個 bug 結論來說就是，一連串的操作最後有機會導致使用到一個 null pointer，然後 kernel 就炸拉…
相關的修復可以參閱這個連結，裡面有大概提到問題發生點以及修復方式。
https://kernel.ubuntu.com/git/ubuntu/ubuntu-impish.git/commit/?id=6a6dd081d512c812a937503d5949e4479340accb
個人資訊
我目前於 Hiskio 平台上面有開設 Kubernetes 相關課程，歡迎有興趣的人參考並分享，裡面有我從底層到實戰中對於 Kubernetes 的各種想法
詳細可以參閱
線上課程詳細資訊: https://course.hwchiu.com/
另外，歡迎按讚加入我個人的粉絲專頁，裡面會定期分享各式各樣的文章，有的是翻譯文章，也有部分是原創文章，主要會聚焦於 CNCF 領域
https://www.facebook.com/technologynoteniu
如果有使用 Telegram 的也可以訂閱下列頻道來，裡面我會定期推播通知各類文章
https://t.me/technologynote
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