Date: Sun, 25 Aug 2002 19:18:08 +0200 (CEST) From: Aurelien Nephtali <aurelien.nephtali@wanadoo.fr> To: FreeBSD-gnats-submit@FreeBSD.org Subject: bin/42005: dhclient running + non-existent interface = CPU 100% Message-ID: <200208251718.g7PHI8S2003663@nebula.wanadoo.fr>
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>Number: 42005
>Category: bin
>Synopsis: dhclient running + non-existent interface = CPU 100%
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sun Aug 25 10:30:01 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: Aurelien Nephtali <aurelien.nephtali@wanadoo.fr>
>Release: FreeBSD 4.6-STABLE i386
>Organization:
none
>Environment:
System: FreeBSD nebula.wanadoo.fr 4.6-STABLE FreeBSD 4.6-STABLE #144: Sun Aug 25 10:38:56 CEST 2002 dak@nebula.wanadoo.fr:/usr/src/sys/compile/NEBULA i386
>Description:
When a net interface disappears and if a 'dhclient' is attached to this interface,
the CPU rise to 100% and the log message 'receive_packet on X: Device not configured'
goes to /var/log/messages.
This is a know problem (someone already complains on -stable i think) but apparently
it wasn't fixed (yet). This problem is only on laptops with PCMCIA NIC.
>How-To-Repeat:
dhclient <interface> and remove the NIC.
>Fix:
Apply this patch from /usr/src. I choose to exit the soft since
it's not usefull to have it running if no interface is present and
moreover a new dhclient X is needed if the NIC is re-plugged.
--- discover.c.patch begins here ---
--- contrib/isc-dhcp/common/discover.c Thu Apr 11 12:16:46 2002
+++ contrib/isc-dhcp/common/discover.c Sat Aug 24 22:40:13 2002
@@ -756,7 +756,8 @@
if ((result =
receive_packet (ip, u.packbuf, sizeof u, &from, &hfrom)) < 0) {
log_error ("receive_packet failed on %s: %m", ip -> name);
- return ISC_R_UNEXPECTED;
+ exit(ISC_R_UNEXPECTED);
+ /*return ISC_R_UNEXPECTED;*/
}
if (result == 0)
return ISC_R_UNEXPECTED;
--- discover.c.patch ends here ---
>Release-Note:
>Audit-Trail:
>Unformatted:
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