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[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.] ** Tags added: patch -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to isc-dhcp in Ubuntu. https://bugs.launchpad.net/bugs/2109303 Title: dhclient hang when tons of ip addresses exist Status in isc-dhcp package in Ubuntu: Confirmed Bug description: Ubuntu ====== No LSB modules are available. Description: Ubuntu 24.04.2 LTS Release: 24.04 Package ======= isc-dhcp-client: Installed: 4.4.3-P1-4ubuntu2 Candidate: 4.4.3-P1-4ubuntu2 Version table: *** 4.4.3-P1-4ubuntu2 500 500 http://archive.ubuntu.com/ubuntu noble/universe amd64 Packages 100 /var/lib/dpkg/status Steps to Reproduce ================== # ip l add dev dummy type dummy # ip l set dev dummy up # for i in {1..50}; do for j in {1..50}; do ip a a 192.168.$i.$j/24 dev dummy; done; done # ip -o a show dev dummy | wc -l 2500 # dhclient -v dummy Result ====== After the operations above, we could see the dhclient hanging. The top command showed the dhclient's memory was increasing, seemed a memory leak happened. Also CPU usage was pretty high. top - 02:13:48 up 12 days, 23:59, 0 user, load average: 2.99, 2.62, 2.43 Tasks: 5 total, 2 running, 3 sleeping, 0 stopped, 0 zombie %Cpu(s): 1.8 us, 1.9 sy, 0.0 ni, 96.3 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st MiB Mem : 772016.8 total, 614554.4 free, 111778.8 used, 50785.8 buff/cache MiB Swap: 0.0 total, 0.0 free, 0.0 used. 660238.0 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2870 root 20 0 283.4m 282.3m 2.3m R 100.0 0.0 5:05.29 dhclient 1 root 20 0 4.5m 3.8m 3.2m S 0.0 0.0 0:00.00 bash 10 root 20 0 4.6m 4.1m 3.4m S 0.0 0.0 0:00.59 bash 2869 root 20 0 3.2m 1.3m 1.2m S 0.0 0.0 0:00.00 dhclient 2882 root 20 0 8.7m 5.0m 2.9m R 0.0 0.0 0:00.01 top To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/isc-dhcp/+bug/2109303/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
