OpenWrt/LEDE Project

  • Status Unconfirmed
  • Percent Complete
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  • Task Type Bug Report
  • Category Base system
  • Assigned To No-one
  • Operating System All
  • Severity Low
  • Priority Very Low
  • Reported Version Trunk
  • Due in Version Undecided
  • Due Date Undecided
  • Private
Attached to Project: OpenWrt/LEDE Project
Opened by Bastian Bittorf - 14.10.2021

FS#4085 - dnsmasq: cannot open or create lease file /tmp/dhcp.leases: Read-only file system

with a selfcompiled r17753 with mipsel ramips/mt7621 on ‘TP-LINK Archer C6U’ It was working without these issues with r17560

Thu Oct 14 18:32:38 2021 user.err : jail: creat(/tmp/ujail-lhNbFK/tmp/dhcp.leases) failed: Read-only file system
Thu Oct 14 18:32:38 2021 daemon.crit dnsmasq[1]: cannot open or create lease file /tmp/dhcp.leases: Read-only file system
Thu Oct 14 18:32:38 2021 daemon.crit dnsmasq[1]: FAILED to start up
Thu Oct 14 18:32:43 2021 user.err : jail: creat(/tmp/ujail-FlhCEP/tmp/dhcp.leases) failed: Read-only file system
Thu Oct 14 18:32:43 2021 daemon.crit dnsmasq[1]: cannot open or create lease file /tmp/dhcp.leases: Read-only file system
Thu Oct 14 18:32:43 2021 daemon.crit dnsmasq[1]: FAILED to start up
Thu Oct 14 18:32:49 2021 user.err : jail: creat(/tmp/ujail-fHEJCC/tmp/dhcp.leases) failed: Read-only file system
Thu Oct 14 18:32:49 2021 daemon.crit dnsmasq[1]: cannot open or create lease file /tmp/dhcp.leases: Read-only file system
Thu Oct 14 18:32:49 2021 daemon.crit dnsmasq[1]: FAILED to start up
Thu Oct 14 18:32:50 2021 daemon.alert kalua: /usr/sbin/cron.monitorin: curl_it() [ERR] returning 4 after fetching 'http://intercity-vpn.de/networ...'
Thu Oct 14 18:32:54 2021 user.err : jail: creat(/tmp/ujail-jGfjpp/tmp/dhcp.leases) failed: Read-only file system
Thu Oct 14 18:32:54 2021 daemon.crit dnsmasq[1]: cannot open or create lease file /tmp/dhcp.leases: Read-only file system
Thu Oct 14 18:32:54 2021 daemon.crit dnsmasq[1]: FAILED to start up
Thu Oct 14 18:32:59 2021 user.err : jail: creat(/tmp/ujail-knefoG/tmp/dhcp.leases) failed: Read-only file system
Thu Oct 14 18:32:59 2021 daemon.crit dnsmasq[1]: cannot open or create lease file /tmp/dhcp.leases: Read-only file system
Thu Oct 14 18:32:59 2021 daemon.crit dnsmasq[1]: FAILED to start up
Thu Oct 14 18:33:02 2021 daemon.alert kalua: /usr/sbin/cron.monitorin: curl_it() [ERR] returning 4 after fetching 'http://intercity-vpn.de/networ...'
Thu Oct 14 18:33:04 2021 user.err : jail: creat(/tmp/ujail-jneGLN/tmp/dhcp.leases) failed: Read-only file system
Thu Oct 14 18:33:04 2021 daemon.crit dnsmasq[1]: cannot open or create lease file /tmp/dhcp.leases: Read-only file system
Thu Oct 14 18:33:04 2021 daemon.crit dnsmasq[1]: FAILED to start up
Thu Oct 14 18:33:04 2021 daemon.info procd: Instance dnsmasq::cfg01411c s in a crash loop 6 crashes, 0 seconds since last crash

The filesystem looks normal:

root@box:~ :) df -h
Filesystem                Size      Used Available Use% Mounted on
/dev/root                 5.5M      5.5M         0 100% /rom
tmpfs                    59.4M      1.3M     58.1M   2% /tmp
/dev/mtdblock4            7.4M    476.0K      7.0M   6% /overlay
overlayfs:/overlay        7.4M    476.0K      7.0M   6% /
tmpfs                   512.0K         0    512.0K   0% /dev

root@liszt28-hybrid--37:~ :) echo foo >/tmp/dhcp.leases.txt 

root@liszt28-hybrid--37:~ :) ls -l /tmp/dhcp.leases.txt
-rw-r--r--    1 root     root             4 Oct 14 18:37 /tmp/dhcp.leases.txt

root@liszt28-hybrid--37:~ :) ps | grep jail
 3898 root      2616 S    {hostapd} /sbin/ujail -n hostapd -U network -G network -C /etc/capabilities/wpad.json -c -- /usr/sbin/hostapd -s -g /var/run/hostapd/global
 3899 root      2616 S    {wpa_supplicant} /sbin/ujail -n wpa_supplicant -U network -G network -C /etc/capabilities/wpad.json -c -- /usr/sbin/wpa_supplicant -n -s -g /var/run/wpa_supplican
 4489 root      1280 S    grep jail

root@liszt28-hybrid--37:~ :) pidof dnsmasq || echo BAD
BAD

root@liszt28-hybrid--37:~ :) uci show dhcp
dhcp.@dnsmasq[0]=dnsmasq
dhcp.@dnsmasq[0].logqueries='0'
dhcp.@dnsmasq[0].domainneeded='0'
dhcp.@dnsmasq[0].boguspriv='1'
dhcp.@dnsmasq[0].filterwin2k='0'
dhcp.@dnsmasq[0].localise_queries='1'
dhcp.@dnsmasq[0].rebind_protection='0'
dhcp.@dnsmasq[0].rebind_localhost='0'
dhcp.@dnsmasq[0].expandhosts='1'
dhcp.@dnsmasq[0].nonegcache='0'
dhcp.@dnsmasq[0].authoritative='1'
dhcp.@dnsmasq[0].readethers='1'
dhcp.@dnsmasq[0].leasefile='/tmp/dhcp.leases'
dhcp.@dnsmasq[0].resolvfile='/tmp/resolv.conf.auto'
dhcp.@dnsmasq[0].addnhosts='/var/run/hosts_olsr' '/etc/local.hosts'
dhcp.@dnsmasq[0].server='8.8.8.8'
dhcp.@dnsmasq[0].notinterface='wan' 'wlan' 'wlanRADIO1'
dhcp.@dnsmasq[0].dhcpscript='/etc/dhcp-script.d/10dhcpscript'
dhcp.@dnsmasq[0].cachesize='1000'
dhcp.@dnsmasq[0].local='/internet/'
dhcp.@dnsmasq[0].domain='internet'
dhcp.lan=dhcp
dhcp.lan.interface='lan'
dhcp.lan.start='34'
dhcp.lan.limit='13'
dhcp.lan.force='1'
dhcp.lan.ignore='0'
dhcp.lan.leasetime='48h'
dhcp.wlan=dhcp
dhcp.wlan.force='1'
dhcp.wlan.ignore='0'
dhcp.wlan.interface='mastergate'
dhcp.wlan.dhcp_option='3,100.64.0.1' '6,100.64.0.1'
dhcp.wlan.leasetime='12h'
dhcp.wlan.start='100.65.35.2'
dhcp.wlan.limit='253'
dhcp.wan=dhcp
dhcp.wan.interface='wan'
dhcp.wan.ignore='1'
dhcp.@host[0]=host
dhcp.@host[0].ip='127.0.0.2'
dhcp.@host[0].mac='00:00:00:00:00:00'
dhcp.@host[0].name='lo-alias'
dhcp.@dhcp[3]=dhcp
dhcp.@dhcp[3].interface='loopback'
dhcp.@dhcp[3].start='2'
dhcp.@dhcp[3].limit='2'
dhcp.@dhcp[3].leasetime='1h'
dhcp.@dhcp[3].force='1'
dhcp.@dhcp[3].ignore='0'
Bastian Bittorf commented on 14.10.2021 19:10

reverting this commit fixes it for me:

commit 44f694ba1bca1417d24e851c637c284f9f78c06d
Author: Daniel Golle <daniel@makrotopia.org>
Date:   Wed Oct 21 15:04:17 2020 +0100

    build: select procd-ujail if !SMALL_FLASH
    
    Add procd-ujail to DEFAULT_PACKAGES if not building for
    space-constraint (FEATURES:=small_flash) targets.
    
    Signed-off-by: Daniel Golle <daniel@makrotopia.org>

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