** Attachment added: "lspci-vvnn.log" https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.15/+bug/1997764/+attachment/5632632/+files/lspci-vvnn.log
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed-hwe-5.15 in Ubuntu. https://bugs.launchpad.net/bugs/1997764 Title: igb driver crashes kernel when receiving jumbo frame UDP packets with all zeros Status in linux-signed-hwe-5.15 package in Ubuntu: New Bug description: With a high MTU (9000) set on the interface, sending packets containing over ~3000 zero bytes to a network card using the igb driver results in broken packets or in the worst case for some packet sizes even leads to kernel panics or full freeze. So far I observed this for Intel I350 and I210 network cards which use the igb driver. This is easy to reproduce: * set MTU to 9000 * send ping of death: ping -M do -p 00 3016 <ip> -> kernel panic or complete freeze of system If the data is not zero, it works fine: ping -M do -p ff 3016 <ip> Depending on packet length: * < 3000: fine * 3016: panic/freeze * > 3030: packet not complete I also tested this with the following kernel versions: * 5.8.0-63-generic -> OK * 5.11.0-46-generic -> OK * 5.13.0-52-generic -> broken * 5.15.0-41-generic -> broken * 5.19.5-051905-generic mainline -> broken We noticed that since we have GigE Vision cameras which send the data via UDP with packet sizes up to 9000. When we turned off the light (and hence many bytes in the payload were zero), the packets would not be complete anymore (checked with tcpdump/wireshark) or even lead to kernel panics. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.15.0-53-generic 5.15.0-53.59~20.04.1 ProcVersionSignature: Ubuntu 5.15.0-53.59~20.04.1-generic 5.15.64 Uname: Linux 5.15.0-53-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.25 Architecture: amd64 CasperMD5CheckResult: skip Date: Thu Nov 24 13:16:00 2022 SourcePackage: linux-signed-hwe-5.15 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.15/+bug/1997764/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
