bisecting fixing commit since b86ee2b7ae42b6b37a918b66236608e2cc325f59 building syzkaller on a7dab6385c1d95547a88e22577fb56fbcd5c37eb testing commit b86ee2b7ae42b6b37a918b66236608e2cc325f59 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 1e4ea311b346fe5c5406f16aac378eb613513ebd3cbb4ab4ab7c71d8c5ba8120 all runs: crashed: unregister_netdevice: waiting for DEV to become free testing current HEAD b8f3be299d5176348b15cc59d55b85faa3dece68 testing commit b8f3be299d5176348b15cc59d55b85faa3dece68 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 2ee1f0bf3ba8c108cfcb6d90711c08977546b524f80bb1b4425c7e1a8ee88941 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 20m47.494500864s (build: 14m8.058419097s, test: 6m16.499594355s) the crash still happens on HEAD commit msg: Linux 4.14.282 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