bisecting fixing commit since 27ce4f2a6817e38ca74c643d47a96359f6cc0c1c building syzkaller on 1bf9a662c66aa432ff2fe3bf2562578cef626c09 testing commit 27ce4f2a6817e38ca74c643d47a96359f6cc0c1c compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 98f43aeb4d61b16a2b8c94b521a0fe4df4c84dbd79badc422ec3dc64513e15d6 all runs: crashed: INFO: trying to register non-static key in skb_dequeue testing current HEAD f96eb53cbd76415edfba99c2cfa88567a885a428 testing commit f96eb53cbd76415edfba99c2cfa88567a885a428 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: cc5bd92939c27d668470980c170a2191023dc7796bfa89161c6ac7b24a49b0ee all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 22m2.537837216s (build: 15m22.533301192s, test: 6m16.071771281s) the crash still happens on HEAD commit msg: Linux 4.14.246 crash: unregister_netdevice: waiting for DEV to become free unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout