Description: net: out-of-bounds due do a signedness issue when defragging ipv6
References:
 https://www.spinics.net/lists/netdev/msg407525.html
 https://groups.google.com/forum/#!topic/syzkaller/GFbGpX7nTEo
Notes:
 Introduced in 4.5-rc1 with 029f7f3b8701cc7aca8bdb31f0c7edd6a479e357
Bugs:
upstream: released (4.9-rc8) [9b57da0630c9fd36ed7a20fc0f98dc82cc0777fa]
3.16-upstream-stable: N/A "Introduced in 4.5-rc1 with 029f7f3b8701cc7aca8bdb31f0c7edd6a479e357"
3.2-upstream-stable: N/A "Introduced in 4.5-rc1 with 029f7f3b8701cc7aca8bdb31f0c7edd6a479e357"
sid: released (4.8.15-1) [bugfix/all/netfilter-ipv6-nf_defrag-drop-mangled-skb-on-ream-er.patch]
3.16-jessie-security: N/A "Vulnerable code not present"
3.2-wheezy-security: N/A "Vulnerable code not present"