CVS commit: src/sys/netipsec

["Maxime Villard" <maxv%netbsd.org@localhost>]

Module Name:    src
Committed By:   maxv
Date:           Tue May  1 05:42:26 UTC 2018

Modified Files:
        src/sys/netipsec: ipsec_output.c

Log Message:
Fix the checks in compute_ipsec_pos, otherwise m_copydata could crash. I
already fixed half of the problem two months ago in rev1.67, back then I
thought it was not triggerable because each packet we emit is guaranteed
to have correctly formed IPv6 options; but it is actually triggerable via
IPv6 forwarding, we emit a packet we just received, and we don't sanitize
its options before invoking IPsec.

Since it would be wrong to just stop the iteration and continue the IPsec
processing, allow compute_ipsec_pos to fail, and when it does, drop the
packet entirely.


To generate a diff of this commit:
cvs rdiff -u -r1.74 -r1.75 src/sys/netipsec/ipsec_output.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.