bisecting fixing commit since d7e78d08fa77acdea351c8f628f49ca9a0e1029a building syzkaller on abf9ba4fc75d9b29af15625d44dcfc1360fad3b7 testing commit d7e78d08fa77acdea351c8f628f49ca9a0e1029a compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 9dc3d0e6a72ae366aa70edc4f451829ae7a473f07632617181081261935454e2 all runs: crashed: possible deadlock in rtnl_lock testing current HEAD 21ad423fe5210f5aa50bd43f9ae99b655090a227 testing commit 21ad423fe5210f5aa50bd43f9ae99b655090a227 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 71e1f416477cf149a61b6cf3e632df154bb9c1a9565879c9d5ade11270a64445 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 21m48.904533766s (build: 15m16.53517934s, test: 6m2.398060576s) the crash still happens on HEAD commit msg: Linux 4.14.265 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout