Thanks for the work you all have done tracking this down. I am experiencing an issue with identical symptoms. I understand the problem should be fixed with 4.15+, so I may be experiencing a different bug. If anyone could help me determine that conclusively or point me in a direction that might help me fix this one, I'd really appreciate it!
Below I have reproduced the issue in the same way as above, with the same workaround. Dell Precision 5530 TB16 Dock Ubuntu 18.04 Kernel: 4.15.0-1034-oem $ sudo ethtool --offload enx3c2c30b2d39a rx on $ for i in 1 2 3 4 5 6 7 8 9; do curl -s http://old-releases.ubuntu.com/releases/17.04/ubuntu-17.04-server-amd64.img -o $i.iso; md5sum $i.iso; done 4672ce371fb3c1170a9e71bc4b2810b9 1.iso 5cfcb270becce9962c0dc305dac943b9 2.iso 4672ce371fb3c1170a9e71bc4b2810b9 3.iso ba8ec5ef56501dbab731dcd0e627a334 4.iso 7d5d892efa5899a99129d90167508434 5.iso c0402e3a6a1179d77c3132e15af2b81f 6.iso 4672ce371fb3c1170a9e71bc4b2810b9 7.iso 4672ce371fb3c1170a9e71bc4b2810b9 8.iso 4672ce371fb3c1170a9e71bc4b2810b9 9.iso $ sudo ethtool --offload enx3c2c30b2d39a rx off $ for i in 1 2 3 4 5 6 7 8 9; do curl -s http://old-releases.ubuntu.com/releases/17.04/ubuntu-17.04-server-amd64.img -o $i.iso; md5sum $i.iso; done 4672ce371fb3c1170a9e71bc4b2810b9 1.iso 4672ce371fb3c1170a9e71bc4b2810b9 2.iso 4672ce371fb3c1170a9e71bc4b2810b9 3.iso 4672ce371fb3c1170a9e71bc4b2810b9 4.iso 4672ce371fb3c1170a9e71bc4b2810b9 5.iso 4672ce371fb3c1170a9e71bc4b2810b9 6.iso 4672ce371fb3c1170a9e71bc4b2810b9 7.iso 4672ce371fb3c1170a9e71bc4b2810b9 8.iso 4672ce371fb3c1170a9e71bc4b2810b9 9.iso $ uname -r 4.15.0-1034-oem $ -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1729674 Title: TB16 dock ethernet corrupts data with hw checksum silently failing Status in Dell Sputnik: Triaged Status in linux package in Ubuntu: Fix Released Status in linux source package in Xenial: Fix Released Status in linux source package in Artful: Fix Released Status in linux source package in Bionic: Fix Released Status in linux package in Fedora: Confirmed Bug description: It looks like TCP rx and tx checksum offloading is broken on the TB16 dock's ethernet adapter. For example downloading a large file such as the Ubuntu ISO, and then running an md5sum on it yields the incorrect md5sum. This is because rx-checksumming: on tx-checksumming: on and both set to on by default. Running sudo ethtool -K <TB16 eth device> tx off rx off, allows the download to complete correctly. This is very bad since this can cause very bad untrustworthy behavior. This was conducted using an Dell Precision 5520 on Ubuntu 16.04+linux- generic-hwe-16.04-edge. Thank you To manage notifications about this bug go to: https://bugs.launchpad.net/dell-sputnik/+bug/1729674/+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
