#9  0xffffffff80573f3b in panic (fmt=Variable "fmt" is not available.
) at /usr/src/sys/kern/kern_shutdown.c:558
#10 0xffffffff805656d2 in _mtx_lock_sleep (m=Variable "m" is not available.
) at /usr/src/sys/kern/kern_mutex.c:341
#11 0xffffffff805657c1 in _mtx_lock_flags (m=0xffffff0004825c38, opts=0,
    file=0xffffffff80960560 "/usr/src/sys/netinet/ip_input.c", line=639) at /usr/src/sys/kern/kern_mutex.c:203
#12 0xffffffff806754f6 in ip_input (m=0xffffff0004a75900) at /usr/src/sys/netinet/ip_input.c:639
#13 0xffffffff80627bea in netisr_dispatch_src (proto=1, source=Variable "source" is not available.
) at /usr/src/sys/net/netisr.c:902
#14 0xffffffff806203fd in ether_demux (ifp=0xffffff0004825800, m=0xffffff0004a75900)
    at /usr/src/sys/net/if_ethersubr.c:899
#15 0xffffffff80620828 in ether_input (ifp=0xffffff0004825800, m=0xffffff0004a75900)
    at /usr/src/sys/net/if_ethersubr.c:757
#16 0xffffffff8065e9e6 in sta_input (ni=0xffffff80008a5000, m=0xffffff0004a75900, rssi=27, nf=-95)
    at /usr/src/sys/net80211/ieee80211_sta.c:828
#17 0xffffffff804c0cee in rum_bulk_read_callback (xfer=Variable "xfer" is not available.
) at /usr/src/sys/dev/usb/wlan/if_rum.c:938
#18 0xffffffff804b70e4 in usbd_callback_wrapper (pq=Variable "pq" is not available.
) at /usr/src/sys/dev/usb/usb_transfer.c:2074
#19 0xffffffff804b4db6 in usb_command_wrapper (pq=0xffffff80005da060, xfer=Variable "xfer" is not available.
)
    at /usr/src/sys/dev/usb/usb_transfer.c:2654
#20 0xffffffff804b4f16 in usb_callback_proc (_pm=Variable "_pm" is not available.
) at /usr/src/sys/dev/usb/usb_transfer.c:1946
#21 0xffffffff804b27c0 in usb_process (arg=Variable "arg" is not available.
) at /usr/src/sys/dev/usb/usb_process.c:161
#22 0xffffffff8054b98a in fork_exit (callout=0xffffffff804b2700 <usb_process>, arg=0xffffff8000322d10,
    frame=0xffffff8056a89c90) at /usr/src/sys/kern/kern_fork.c:842
#23 0xffffffff8082eaae in fork_trampoline () at /usr/src/sys/amd64/amd64/exception.S:552







(kgdb) frame 12
#12 0xffffffff806754f6 in ip_input (m=0xffffff0004a75900) at /usr/src/sys/netinet/ip_input.c:639
639                     IF_ADDR_LOCK(ifp);
(kgdb) list
634              * interface.  Reception of forwarded directed broadcasts would
635              * be handled via ip_forward() and ether_output() with the loopback
636              * into the stack for SIMPLEX interfaces handled by ether_output().
637              */
638             if (ifp != NULL && ifp->if_flags & IFF_BROADCAST) {
639                     IF_ADDR_LOCK(ifp);
640                     TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
641                             if (ifa->ifa_addr->sa_family != AF_INET)
642                                     continue;
643                             ia = ifatoia(ifa);