bisecting fixing commit since a35d65bedfbc38cffe2701798cd6810bbdf07892 building syzkaller on 3cd800e43d452c348a66ba475143831d94969a24 testing commit a35d65bedfbc38cffe2701798cd6810bbdf07892 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: c93b054b699a2a68b735974ca32a46e6b93022e8ebb3f71a42d7023806d76589 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: cd2633aadd9f503356de91dbf7b887bc1ac13449cc60094e74345c26151a7e42 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 26m6.493640205s (build: 19m16.488542037s, test: 6m27.2275945s) the crash still happens on HEAD commit msg: Linux 4.14.288 crash: unregister_netdevice: waiting for DEV to become free IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready can: request_module (can-proto-0) failed. can: request_module (can-proto-0) failed. can: request_module (can-proto-0) failed. unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 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