Public bug reported: Using Ubuntu 21.04 on bare metal. When attempting to perform a scan of an entire subnet, I receive the following error:
sudo nmap -sn 192.168.0.1/24 Starting Nmap 7.80 ( https://nmap.org ) at 2021-10-14 10:14 EDT nmap: Target.cc:503: void Target::stopTimeOutClock(const timeval*): Assertion `htn.toclock_running == true' failed. Aborted However, if I specify a smaller range, the scan is successful: sudo nmap -sn 192.168.0.1-30 Starting Nmap 7.80 ( https://nmap.org ) at 2021-10-14 10:14 EDT Nmap scan report for _gateway (192.168.0.1) Host is up (0.0071s latency). MAC Address: XXXXXX (XXXXXX) Nmap scan report for 192.168.0.26 Host is up (0.047s latency). MAC Address: XXXXXX (XXXXXX) Nmap done: 30 IP addresses (2 hosts up) scanned in 1.15 seconds Adding --min-parallelism=100 also results in a successful scan on the entire subnet. apt-cache policy nmap nmap: Installed: 7.91+dfsg1+really7.80+dfsg1-1 Candidate: 7.91+dfsg1+really7.80+dfsg1-1 Version table: *** 7.91+dfsg1+really7.80+dfsg1-1 500 500 http://us.archive.ubuntu.com/ubuntu hirsute/universe amd64 Packages 100 /var/lib/dpkg/status nmap -V Nmap version 7.80 ( https://nmap.org ) Platform: x86_64-pc-linux-gnu Compiled with: liblua-5.3.3 openssl-1.1.1f nmap-libssh2-1.8.2 libz-1.2.11 libpcre-8.39 libpcap-1.10.0 nmap-libdnet-1.12 ipv6 Compiled without: Available nsock engines: epoll poll select ** Affects: nmap (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1947165 Title: nmap crashes when scanning /24 subnet To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nmap/+bug/1947165/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
