Looks like a USB driver network device ref count bug. Begin forwarded message: Date: Wed, 21 Apr 2021 08:39:38 +0000 From: bugzilla-daemon@xxxxxxxxxxxxxxxxxxx To: stephen@xxxxxxxxxxxxxxxxxx Subject: [Bug 212741] New: unregister_netdevice: waiting for enp0s20f0u1 to become free. https://bugzilla.kernel.org/show_bug.cgi?id=212741 Bug ID: 212741 Summary: unregister_netdevice: waiting for enp0s20f0u1 to become free. Product: Networking Version: 2.5 Kernel Version: 5.11.14 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: Other Assignee: stephen@xxxxxxxxxxxxxxxxxx Reporter: dexter+kernelbugzilla@xxxxxxxxxxxxxxx Regression: No This problem exists for years by now, I could work around it until now. Somewhere around kernel 4.9 ish this problem started to appear. I have an USB network adapter and whenever the connection is severed (because I touch the cable, USB reset, sleep, cosmic rays) the kernel starts logging below message every 10~ish seconds. The usagecount is always different, but increases with uptime. I can replicate this on all my laptops and workstations. My setup is quite straigtforward, just (networkmanager)DHCP and a wireguard VPN. Running Fedora 33 (but exists since like 26 or so). [ 992.787930] unregister_netdevice: waiting for enp0s20f0u1 to become free. Usage count = 8113 -- You may reply to this email to add a comment. You are receiving this mail because: You are the assignee for the bug.
