Module Name: src
Committed By: maxv
Date: Thu Feb 8 06:50:38 UTC 2018
Modified Files:
src/sys/netinet: udp_usrreq.c
Log Message:
Fix three pretty bad mistakes in NAT-T:
* If we got a keepalive packet, we need to call m_freem, not m_free.
Here the next mbufs in the chain are not freed. Seems easy to remotely
DoS the system by sending fragmented keepalives in a loop.
* If !ipsec_used, free the mbuf.
* In udp_input, we need to update 'uh', because udp4_realinput may have
modified the chain. Perhaps we also need to re-enforce alignment, so
add an XXX.
To generate a diff of this commit:
cvs rdiff -u -r1.236 -r1.237 src/sys/netinet/udp_usrreq.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
