PR/53043 CVS commit: src/sys

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

The following reply was made to PR kern/53043; it has been noted by GNATS.

From: "Ryota Ozaki" <ozaki-r%netbsd.org@localhost>
To: gnats-bugs%gnats.NetBSD.org@localhost
Cc: 
Subject: PR/53043 CVS commit: src/sys
Date: Sat, 24 Feb 2018 07:37:09 +0000

 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.