Shyam Prasad N <nspmangalore@xxxxxxxxx> writes: > A customer reported this deadlock in a Kubernetes setup running on Ubuntu-18.04. > This must be a 5.4 kernel, running this code: > https://git.launchpad.net/~canonical-kernel/ubuntu/+source/linux-azure/+git/bionic > > Based on the stack, it appears to be a hang in DFS reconnect codepath, > trying to access the DFS cache lock in dfs_cache_update_vol. > > Can you tell if this is a known issue that has been fixed since? Looks like this has been fixed by 06d57378bcc9 ("cifs: Fix potential deadlock when updating vol in cifs_reconnect()") > And if Ubuntu should backport any fix to 5.4? I would say so. It would probably also require others dfs related patches to be backported in addition to the above. > I could not find the function in the mainline codebase. Yes, it has changed alot.
