CVS commit: src/sys

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

Module Name:    src
Committed By:   ozaki-r
Date:           Sat Feb 24 07:37:09 UTC 2018

Modified Files:
        src/sys/netinet: in.c ip_input.c wqinput.c
        src/sys/netinet6: in6.c ip6_input.c
        src/sys/rump/net/lib/libnetinet: netinet_component.c

Log Message:
Avoid a deadlock between softnet_lock and IFNET_LOCK

A deadlock occurs because there is a violation of the rule of lock ordering;
softnet_lock is held with hodling IFNET_LOCK, which violates the rule.
To avoid the deadlock, replace softnet_lock in in_control and in6_control
with KERNEL_LOCK.

We also need to add some KERNEL_LOCKs to protect the network stack surely.
This is required, for example, for PR kern/51356.

Fix PR kern/53043


To generate a diff of this commit:
cvs rdiff -u -r1.218 -r1.219 src/sys/netinet/in.c
cvs rdiff -u -r1.375 -r1.376 src/sys/netinet/ip_input.c
cvs rdiff -u -r1.3 -r1.4 src/sys/netinet/wqinput.c
cvs rdiff -u -r1.259 -r1.260 src/sys/netinet6/in6.c
cvs rdiff -u -r1.192 -r1.193 src/sys/netinet6/ip6_input.c
cvs rdiff -u -r1.10 -r1.11 \
    src/sys/rump/net/lib/libnetinet/netinet_component.c

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