Public bug reported: Observed packet loss and major slowdown in Nmap on Ubuntu 14.04: https://github.com/nmap/nmap/issues/34
Traced to this bug report for libpcap 1.5.3: https://github.com/the- tcpdump-group/libpcap/issues/380 Underlying issue is a bug in the Linux kernel which was fixed in 3.19: https://github.com/torvalds/linux/commit/da413ee Please backport this patch to Ubuntu 14.04 LTS kernel. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-53-generic 3.13.0-53.89 ProcVersionSignature: Ubuntu 3.13.0-53.89-generic 3.13.11-ckt19 Uname: Linux 3.13.0-53-generic x86_64 ApportVersion: 2.14.1-0ubuntu3.10 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: nmap 12401 F.... pulseaudio /dev/snd/pcmC0D0c: nmap 12401 F...m pulseaudio /dev/snd/pcmC0D0p: nmap 12401 F...m pulseaudio /dev/snd/timer: nmap 12401 f.... pulseaudio CurrentDmesg: [ 25.541696] init: plymouth-upstart-bridge main process ended, respawning Date: Thu May 21 07:42:08 2015 HibernationDevice: RESUME=UUID=e4b6770e-dcc5-445d-a445-25d9a244e204 InstallationDate: Installed on 2015-01-01 (139 days ago) InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2) IwConfig: eth0 no wireless extensions. lo no wireless extensions. Lsusb: Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 002: ID 80ee:0021 VirtualBox USB Tablet Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub MachineType: innotek GmbH VirtualBox ProcEnviron: TERM=linux PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 VESA VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-53-generic root=UUID=032922f2-3fe1-4228-8c93-8c1e9afc4289 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-53-generic N/A linux-backports-modules-3.13.0-53-generic N/A linux-firmware 1.127.12 RfKill: SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 12/01/2006 dmi.bios.vendor: innotek GmbH dmi.bios.version: VirtualBox dmi.board.name: VirtualBox dmi.board.vendor: Oracle Corporation dmi.board.version: 1.2 dmi.chassis.type: 1 dmi.chassis.vendor: Oracle Corporation dmi.modalias: dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr: dmi.product.name: VirtualBox dmi.product.version: 1.2 dmi.sys.vendor: innotek GmbH ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug trusty -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1457472 Title: TPACKET_V3 in Linux before 3.19 causes packet loss in libpcap To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1457472/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
