bisecting fixing commit since d7e78d08fa77acdea351c8f628f49ca9a0e1029a building syzkaller on abf9ba4fc75d9b29af15625d44dcfc1360fad3b7 testing commit d7e78d08fa77acdea351c8f628f49ca9a0e1029a compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: ad942b195265846e3d0c409027935e15b6130c091282538784103ca11061927f all runs: crashed: possible deadlock in rtnl_lock testing current HEAD 569d1abf9402e943bf00821a6e0b8e13bffde699 testing commit 569d1abf9402e943bf00821a6e0b8e13bffde699 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: d3f71ac97746989fbde015feb70969c701377b6ec2bda5eb79fdce6ad2638892 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 26m30.586892577s (build: 19m4.026774841s, test: 6m45.413250029s) the crash still happens on HEAD commit msg: Linux 4.14.278 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