** Description changed:
This bug is present in the latest versions of isc-dhcp-server available
in precise and in natty.
This bugs prevents dhcpd from detecting the presence of an already
running dhcpd, the result is multiple copies of dhcpd running when there
should only ever be one ( or none ).
-
- apparmor="DENIED" operation="open" parent=31445 profile="/usr/sbin/dhcpd"
name="/run/dhcp-server/dhcpd.pid" pid=31446 comm="dhcpd" requested_mask="r"
denied_mask="r" fsuid=121 ouid=121
+ apparmor="DENIED" operation="open" parent=31445
+ profile="/usr/sbin/dhcpd" name="/run/dhcp-server/dhcpd.pid" pid=31446
+ comm="dhcpd" requested_mask="r" denied_mask="r" fsuid=121 ouid=121
Apparmor config for dhcpd
/{,var/}run/{,dhcp-server/}dhcpd{,6}.pid w,
dhcpd needs access to read the pid file in server/dhcpd.c
/*Read previous pid file. */
if ((i = open (path_dhcpd_pid, O_RDONLY)) >= 0) {
status = read(i, pbuf, (sizeof pbuf) - 1);
close (i);
if (status > 0) {
pbuf[status] = 0;
pid = atoi(pbuf);
/*
* If there was a previous server process and
* it is still running, abort
*/
if (!pid ||
(pid != getpid() && kill(pid, 0) == 0))
log_fatal("There's already a "
"DHCP server running.");
}
}
+
+ Testcase:
+ 1) Follow the testcase from bug 985417
+ 2) Once you're done with that testcase, restart isc-dhcp-server and
isc-dhcp-server6 (if doing IPv6 testing)
+ 3) Check "dmesg" for any apparmor error
** Changed in: isc-dhcp (Ubuntu Precise)
Importance: Undecided => Low
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https://bugs.launchpad.net/bugs/1005062
Title:
dhcpd cannot READ /var/run/dhcpd.pid because of bad apparmor config
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