https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=229384
--- Comment #6 from Kajetan Staszkiewicz <veg...@tuxpowered.net> --- I don't use rc system to configure carps at all. They are done dynamically whenever required by new configuraion from some external system. I'm not runnig a clean 11.2-RELEASE. There are some custom patches for pf and backports from HEAD, please check here: https://github.com/innogames/freebsd/commits/iglb/11.2/SomethingCompletelyDifferent I wrote this script in an attempt to provide carp misconfiguration: ---------- 8< ---------- #!/bin/sh IFACE=internal4027 VHID=27 ADDR_BASE='2a00:f00:42:0000' if [ -z "$1" ]; then for SUBNET in $(seq 10); do SUBNET=$(printf '%04x' $SUBNET) sh $(dirname $0)/break_carps.sh $SUBNET & sh $(dirname $0)/break_carps.sh $SUBNET & done else echo "Spawned child for subnet $1" for i in $(seq 10); do ADDR_LAST=$(printf '%04x' $i) ADDR="$ADDR_BASE:$1::$ADDR_LAST" ifconfig $IFACE inet6 $ADDR/128 vhid $VHID alias sleep 0.5 ifconfig $IFACE inet6 $ADDR/128 vhid $VHID -alias done fi wait ---------- >8 ---------- Even better than misconfiguration, I got this nice panic: Fatal trap 12: page fault while in kernel mode #13 0xffffffff8159a8d7 in carp_hmac_prepare (sc=0xfffff80008599000) at /usr/home/kajetan.staszkiewicz/freebsd.git/sys/netinet/ip_carp.c:384 #14 0xffffffff8159a531 in carp_ioctl (ifr=<value optimized out>, cmd=<value optimized out>, td=<value optimized out>) at /usr/home/kajetan.staszkiewicz/freebsd.git/sys/netinet/ip_carp.c:1698 #15 0xffffffff8072732f in ifioctl (so=0xfffff80011f61000, cmd=3223349749, data=0xfffffe0666e5e9d0 "internal4027", td=0xfffff80102a8b620) at /usr/home/kajetan.staszkiewicz/freebsd.git/sys/net/if.c:3041 #16 0xffffffff8069736d in kern_ioctl (td=0xfffff80102a8b620, fd=3, com=3223349749, data=<value optimized out>) at file.h:323 Then I compiled kernel with INVARIANTS and INVARIANT_SUPPORT. I tried something even less ugly than the script above, that is I just added same IPv6 carp address twice (one which is *not* in any network available on iface). This resulted in: panic: carp_attach: ifa 0xfffff80095390000 attached #11 0xffffffff815b3675 in carp_attach (ifa=0xfffff80095390000, vhid=27) at /usr/home/kajetan.staszkiewicz/freebsd.git/sys/netinet/ip_carp.c:1809 #12 0xffffffff807e8ff2 in in6_control (so=<value optimized out>, cmd=<value optimized out>, data=<value optimized out>, ifp=<value optimized out>, td=<value optimized out>) at /usr/home/kajetan.staszkiewicz/freebsd.git/sys/netinet6/in6.c:572 #13 0xffffffff80713b19 in ifioctl (so=0xfffff80011eeb360, cmd=2156423451, data=<value optimized out>, td=0xfffff80095861620) at /usr/home/kajetan.staszkiewicz/freebsd.git/sys/net/if.c:3071 #14 0xffffffff80688729 in kern_ioctl (td=0xfffff80095861620, fd=<value optimized out>, com=<value optimized out>, data=<value optimized out>) at file.h:323 While browsing kernel source on Github I've come accross 5bd3158a3b7184c65d3e1b6d96faf0dd720eb6ac (Which is in master branch but not in 11.2-RELEASE). This indeed solves issues on adding same CARP address twice, but the script above still kills system: panic: Bad link elm 0xfffff800a44c3c00 prev->next != elm #11 0xffffffff807eb33d in in6_unlink_ifa (ia=<value optimized out>, ifp=<value optimized out>) at fnv_hash.h:29 #12 0xffffffff807e8b2d in in6_control (so=<value optimized out>, cmd=2166384921, data=<value optimized out>, ifp=<value optimized out>, td=<value optimized out>) at /usr/home/kajetan.staszkiewicz/freebsd.git/sys/netinet6/in6.c:701 #13 0xffffffff80713b19 in ifioctl (so=0xfffff80011ee6000, cmd=2166384921, data=<value optimized out>, td=0xfffff8002f61b620) at /usr/home/kajetan.staszkiewicz/freebsd.git/sys/net/if.c:3071 #14 0xffffffff80688729 in kern_ioctl (td=0xfffff8002f61b620, fd=<value optimized out>, com=<value optimized out>, data=<value optimized out>) at file.h:323 I'll put kernel with 5bd3158a3b7184c65d3e1b6d96faf0dd720eb6ac on production and see if that solves issue reported in this ticket. But obviously there are more issues deeper. -- You are receiving this mail because: You are the assignee for the bug. _______________________________________________ freebsd-net@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
