bisecting fixing commit since cbfa1702aaf69b2311ea1b35e04f113c48368c67 building syzkaller on b74c49a6af84e6ab50018024e8862263b1e0bd6d testing commit cbfa1702aaf69b2311ea1b35e04f113c48368c67 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: a761cb0e328fa2930f1d26bea3b102c5568196b2cec7f4905a81a73c130f82d5 all runs: crashed: WARNING in sta_info_insert_rcu testing current HEAD 84bae26850e3b384a45f0f9a5f8b3b5983afacd8 testing commit 84bae26850e3b384a45f0f9a5f8b3b5983afacd8 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 9232925e27de1e2d04c92cb88f06b6621cf7869f4ccd02657a34fe947d023d51 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 32m59.933845838s (build: 26m1.053770738s, test: 6m17.269378089s) the crash still happens on HEAD commit msg: Linux 4.14.284 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