This bug is awaiting verification that the linux-bluefield/5.4.0-1068.74 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-focal-linux-bluefield verification-needed-focal -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-bluefield in Ubuntu. https://bugs.launchpad.net/bugs/2022370 Title: mlxbf-gige: Fix kernel panic at shutdown Status in linux-bluefield package in Ubuntu: Invalid Status in linux-bluefield source package in Focal: Fix Committed Status in linux-bluefield source package in Jammy: Fix Committed Bug description: SRU Justification: [Impact] We occasionally see a race condition (once every 350 reboots) where napi is still running (mlxbf_gige_poll) while a shutdown has been initiated through "reboot". Since mlxbf_gige_poll is still running, it tries to access a NULL pointer and as a result causes a kernel panic. [Fix] The fix is to explicitly disable napi and dequeue it during shutdown. mlxbf_gige_remove already calls: unregister_netdev->unregister_netdevice->unregister_netdev_queue-> rollback_registered->rollback_registered_many->dev_close_many-> __dev_close_many->ndo_stop->mlxbf_gige_stop which stops napi So use mlxbf_gige_remove in place of the existing shutdown logic. [Test Case] * Issue at least 1000 reboots from linux and make sure there is no panic caused by the mlxbf-gige driver. [Regression Potential] * since this issue is hard to reproduce, it hasn't been tested thoroughly yet. so it needs several reboot loops to validate it. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-bluefield/+bug/2022370/+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
