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 <[email protected]>
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 <[email protected]>
Signed-off-by: Stefan Bader <[email protected]>
[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
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https://bugs.launchpad.net/bugs/1801574
Title:
[cosmic] ipoib ping with large message size failed
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