Module Name: src
Committed By: maxv
Date: Tue May 29 08:24:59 UTC 2018
Modified Files:
src/sys/net: if_ethersubr.c
Log Message:
Replace KASSERT by m_pullup. While the ethernet header is always there
when the packet was received on a physical interface, it may not be if
the packet was received over L2TP/EtherIP.
In particular, if the inner ethernet header ends up on two separate IP
fragments. Here the KASSERT is triggered, and on !DIAGNOSTIC we corrupt
memory.
Note that this is a widespread problem: a lot of L2 code was written with
the assumption that "most" headers are present in the first mbuf.
Obviously, that's not true if L2 encapsulation is being used.
To generate a diff of this commit:
cvs rdiff -u -r1.266 -r1.267 src/sys/net/if_ethersubr.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
