CVS commit: src/sys/net

["Ryota Ozaki" <ozaki-r%netbsd.org@localhost>]

Module Name:    src
Committed By:   ozaki-r
Date:           Wed Feb 27 04:03:06 UTC 2019

Modified Files:
        src/sys/net: rtsock.c

Log Message:
Protect sysctl_rtable with KERNEL_LOCK and softnet_lock

In the function the routing table could be accessed without any locks, which was
unsafe.  Actually, on netbsd-7, a kernel panic happened(*).  The situation of
locking hasn't changed since netbsd-7 so we still need to hold the big locks on
-current (and netbsd-8) too.

Note that if NET_MPSAFE is enabled, the routing table is protected by its own
lock and we don't need the locks.

Reported and tested on netbsd-7 by sborrill@

(*) http://mail-index.netbsd.org/tech-net/2018/11/08/msg007153.html


To generate a diff of this commit:
cvs rdiff -u -r1.246 -r1.247 src/sys/net/rtsock.c

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