Re: -current network buffer exhaustion on RPi2 armv7

From: bob prohaska <fbsd_at_www.zefox.net>
Date: Mon, 30 Mar 2026 18:34:35 UTC 
The Raspberry Pi 2B (armv7) has been updated and it looks like the
messaging, if not the problem, has changed. After boot, wifi works
for a while (hours) after which the connection drops:

Mar 30 07:17:17 generic ntpd[4019]: error resolving pool 2.freebsd.pool.ntp.org: Name could not be resolved at this time (2)
Mar 30 07:18:23 generic syslogd: last message repeated 1 times
Mar 30 07:57:52 generic named[3900]: creating IPv4 interface wlan0 failed; interface ignored
Mar 30 08:57:52 generic syslogd: last message repeated 1 times
Mar 30 09:57:52 generic syslogd: last message repeated 1 times
Mar 30 10:57:52 generic syslogd: last message repeated 1 times

# ifconfig wlan0 down
Mar 30 11:00:11 generic syslogd: last message repeated 1 times
Mar 30 11:00:11 generic dhclient[5255]: My address (192.168.1.12) was deleted, dhclient exiting
# Mar 30 11:00:13 generic dhclient[5255]: connection closed
Mar 30 11:00:13 generic dhclient[5255]: exiting.

# ifconfig wlan0 up
run0: firmware RT3071 ver. 0.33 loaded
# Mar 30 11:00:21 generic named[3900]: creating IPv4 interface wlan0 failed; interface ignored
Mar 30 11:00:24 generic wpa_supplicant[3364]: ioctl[SIOCS80211, op=20, val=0, arg_len=7]: Can't assign requested address
Mar 30 11:00:30 generic named[3900]: creating IPv4 interface wlan0 failed; interface ignored

I think the "...creating IPv4..." message is new.

The subsequent wlan0 down/up cycle restores the connection, despite the
error messages following the ifconfig up, but it quickly fails if unused.
In this case the failure took only a few minutes. The machine is now at

# uname -apKU
FreeBSD generic 16.0-CURRENT FreeBSD 16.0-CURRENT #25 main-n284746-b65e7b4944cc: Sat Mar 28 14:31:28 PDT 2026     bob@generic:/usr/obj/usr/src/arm.armv7/sys/GENERIC arm armv7 1600014 1600014
# 

Thanks for reading, please let me know if there are any useful experiments
to be performed.

bob prohaska