bisecting fixing commit since a35d65bedfbc38cffe2701798cd6810bbdf07892 building syzkaller on 3cd800e43d452c348a66ba475143831d94969a24 testing commit a35d65bedfbc38cffe2701798cd6810bbdf07892 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 7c7a696b1814af744145952e93d260c2dff9423bcf822e8fe21cd8231ff3e0ef all runs: crashed: unregister_netdevice: waiting for DEV to become free testing current HEAD 84bae26850e3b384a45f0f9a5f8b3b5983afacd8 testing commit 84bae26850e3b384a45f0f9a5f8b3b5983afacd8 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: a01c6e1cd750a30594a9ffe36d734d760e1021bf5317e914a6a69f8ce26cb489 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 28m25.787721956s (build: 21m29.701085637s, test: 6m16.26534709s) the crash still happens on HEAD commit msg: Linux 4.14.284 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci0 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci0 command 0x0419 tx timeout