Indeed, the commit is in in 4.15.0-1057 and has been released. Marking
this bug as fixed released.
commit b502cfeffec81be8564189e5498fd3f252b27900
Author: Taehee Yoo <ap420...@gmail.com>
Date: Wed Sep 4 14:40:49 2019 -0300
ip: frags: fix crash in ip_do_fragment()
BugLink: https://bugs.launchpad.net/bugs/1842447
commit 5d407b071dc369c26a38398326ee2be53651cfe4 upstream
A kernel crash occurrs when defragmented packet is fragmented
in ip_do_fragment().
In defragment routine, skb_orphan() is called and
skb->ip_defrag_offset is set. but skb->sk and
skb->ip_defrag_offset are same union member. so that
frag->sk is not NULL.
Hence crash occurrs in skb->sk check routine in ip_do_fragment() when
defragmented packet is fragmented.
** Changed in: linux-azure (Ubuntu)
Status: Incomplete => Fix Released
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Azure Instance never recovered during series of instance reboots.
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