bisecting fixing commit since 8ee0807eedf3bc60c8a47a7dd95387102bcfd063 building syzkaller on 6caa12e443d9f79aa2df67d44cdc6163eaa1e97f testing commit 8ee0807eedf3bc60c8a47a7dd95387102bcfd063 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: b112496d174195b0ad4ca3acffece676fd2d8c584a91bcaaf598b87e9ddb5cbf all runs: crashed: unregister_netdevice: waiting for DEV to become free testing current HEAD dffb5c6ff09c51ed585e3e7665143df103867fc8 testing commit dffb5c6ff09c51ed585e3e7665143df103867fc8 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 6ce71cc883392338b48421fc865e47c1203e7681240fa38e2aa34414ee2d4526 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 25m5.089132526s (build: 18m7.845516871s, test: 6m27.823678985s) the crash still happens on HEAD commit msg: Linux 4.14.280 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