bisecting fixing commit since ad8397a84e1e425e3f8221638cee2bfa237d9b2c building syzkaller on 858ea628800647d5e5b68b11441e42b8ef5652c1 testing commit ad8397a84e1e425e3f8221638cee2bfa237d9b2c compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 7a790d4f664e94eb91551a6bc7013111a83f35b55a4abf83aa1e559177d6a325 all runs: crashed: unregister_netdevice: waiting for DEV to become free testing current HEAD 424a46ea058e160ae6fdd0693092ba79da533f26 testing commit 424a46ea058e160ae6fdd0693092ba79da533f26 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 3d38bd813eb30797710860b356b8e0f234b75d432fc849b89c427a8044177da9 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 23m57.377371236s (build: 16m50.424512543s, test: 6m31.561102602s) the crash still happens on HEAD commit msg: Linux 4.14.288 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