This bug is awaiting verification that the 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: verification-needed-focal -- 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/1881710 Title: tpm: fix TIS locality timeout problems Status in linux package in Ubuntu: Invalid Status in linux-oem-5.6 package in Ubuntu: Invalid Status in linux-oem-osp1 package in Ubuntu: Invalid Status in linux-oem-osp1 source package in Bionic: In Progress Status in linux source package in Focal: Fix Committed Status in linux-oem-5.6 source package in Focal: In Progress Bug description: [Impact] It has been reported that some TIS based TPMs are giving unexpected errors when using the O_NONBLOCK path of the TPM device. The problem is that some TPMs don't like it when you get and then relinquish a locality (as the tpm_try_get_ops()/tpm_put_ops() pair does) without sending a command. This currently happens all the time in the O_NONBLOCK write path. This affects Nuvoton TPMs and was a regression caused by the patch d23d12484307 ("tpm: fix invalid locking in NONBLOCKING mode"). PatchLink: https://patchwork.kernel.org/patch/11576453/ [Fix] Fix this by moving the tpm_try_get_ops() further down the code to after the O_NONBLOCK determination is made. This is safe because the priv->buffer_mutex still protects the priv state being modified. [Regression Risk] Low. This patch only for fix the patch d23d12484307 ("tpm: fix invalid locking in NONBLOCKING mode"). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1881710/+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
