Public bug reported: We see that ping over ipoib interface stuck with large packets, this is a new degradation, this test pass on Ubuntu 18.04. After investigating the issue, we see that commit [1] introduce the issue, and it is not an upstream commit, it is canonical commit. Could you please check with the canonical kernel team why they revert that commit? To reproduce the bug, please use ConnectX-3 devices with ipoib connection with 2044 MTU (default) and run command [2]. Is there open Launchpad on it? [1] commit 77a24c313d21e3765b04d90521e9228a9bb6e332 Author: Tyler Hicks <tyhi...@canonical.com> Date: Fri Aug 3 21:53:15 2018 +0000 Revert "net: increase fragment memory usage limits" This reverts commit c2a936600f78aea00d3312ea4b66a79a4619f9b4. It made denial of service attacks on the IP fragment handling easier to carry out. CVE-2018-5391 Signed-off-by: Tyler Hicks <tyhi...@canonical.com> Signed-off-by: Stefan Bader <stefan.ba...@canonical.com> [2] ping 13.194.22.1 -I 13.194.23.1 -s 65507
** Affects: linux (Ubuntu) Importance: Undecided Status: Incomplete ** Tags: cosmic ** Summary changed: - [bionic] ipoib ping with large message size failed + [cosmic] ipoib ping with large message size failed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1801574 Title: [cosmic] ipoib ping with large message size failed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1801574/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs