Re: ifconfig dumps core and gdb uses an undefined symbol
Date: Wed, 14 Jun 2023 10:35:30 UTC
On Wed, 14 Jun 2023 11:05:31 +0100 Alexander Chernikov <melifaro@FreeBSD.org> wrote: > > On 14 Jun 2023, at 10:53, Gary Jennejohn <garyj@gmx.de> wrote: > > > > On Wed, 14 Jun 2023 09:01:35 +0000 > > Gary Jennejohn <garyj@gmx.de <mailto:garyj@gmx.de>> wrote: > > > >> On Wed, 14 Jun 2023 09:09:04 +0100 > >> Alexander Chernikov <melifaro@FreeBSD.org> wrote: > >> > >>>> On 14 Jun 2023, at 08:59, Gary Jennejohn <garyj@gmx.de> wrote: > >>> Hi Gary, > >>>> > >>>> So, now I have a new problem with current. > >>>> > >>>> I just now updated my current sources and ran buildworld and buildkernel, > >>>> since Gleb fixed the WITHOUT_PF problem. > >>>> > >>>> After installing the new world and kernel I see that ifconfig is dumping > >>>> a core, apparently when it tries to show lo0, since re0 is correctly > >>>> shown: > >>>> > >>>> ifconfig > >>>> re0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 4088 options=82098<VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,WOL_MAGIC,LINKSTATE> > >>>> ether redacted > >>>> inet 192.168.178.XXX netmask 0xffffff00 broadcast 192.168.178.255 > >>>> Segmentation fault (core dumped) > >>> Could you please try to narrow down the crashing command? e.g. > >>> Ifconfig lo0 > >>> Ifconfig lo0 net > >>> Ifconfig lo0 inet6 > >>> Could you try to rebuild ifconfig w/o netlink (e.g. set WITHOUT_NETLINK=yes in the make.conf & make -C sbin/ifconfig clean all install) and see if the new binary works? > >>> > >> > >> I already have WITHOUT_NETLINK=yes in my /etc/src.conf. > >> > >> I didn't install ifconfig. I simply started it from the build directory. > >> > >> ifconfig lo0 shows the settings for lo0 and then dumps core. > >> > > > > After your most recent changes "ifconfig re0" and "ifconfg lo0" don't > > result in any errors. But "ifconfig" alone still results in a core > > dump, which per gdb is happening in the strlcpy() call at in_status_tunnel() > > in af_inet.c. > Indeed. > > diff --git a/sbin/ifconfig/ifconfig.c b/sbin/ifconfig/ifconfig.c > index d30d3e1909ae..6a80ad5763b2 100644 > --- a/sbin/ifconfig/ifconfig.c > +++ b/sbin/ifconfig/ifconfig.c > @@ -822,6 +822,7 @@ list_interfaces_ioctl(if_ctx *ctx) > continue; > if (!group_member(ifa->ifa_name, args->matchgroup, args->nogroup)) > continue; > + ctx->ifname = cp; > /* > * Are we just listing the interfaces? > */ > > Does this one fix the crash? > > YES! -- Gary Jennejohn