bisecting fixing commit since 6b6446efedb27c2766745a04f9b5d4449f51391d building syzkaller on cba33199be220cbf61f7c0c8223d88a25a913d6f testing commit 6b6446efedb27c2766745a04f9b5d4449f51391d compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 35dd2363bf279446312a3103afffae3562f6062ae36eccea8170d914faadc7ca run #0: crashed: WARNING in ieee80211_ibss_csa_beacon run #1: crashed: WARNING in ieee80211_ibss_csa_beacon run #2: crashed: WARNING in ieee80211_ibss_csa_beacon run #3: crashed: WARNING in ieee80211_ibss_csa_beacon run #4: crashed: WARNING in ieee80211_ibss_csa_beacon run #5: crashed: WARNING in ieee80211_ibss_csa_beacon run #6: crashed: WARNING in ieee80211_ibss_csa_beacon run #7: crashed: WARNING in ieee80211_ibss_csa_beacon run #8: crashed: WARNING in ieee80211_ibss_csa_beacon run #9: crashed: WARNING in ieee80211_ibss_csa_beacon run #10: crashed: WARNING in ieee80211_ibss_csa_beacon run #11: crashed: WARNING in ieee80211_ibss_csa_beacon run #12: crashed: WARNING in ieee80211_ibss_csa_beacon run #13: OK run #14: crashed: WARNING in ieee80211_ibss_csa_beacon run #15: crashed: WARNING in ieee80211_ibss_csa_beacon run #16: crashed: WARNING in ieee80211_ibss_csa_beacon run #17: crashed: WARNING in ieee80211_ibss_csa_beacon run #18: crashed: WARNING in ieee80211_ibss_csa_beacon run #19: OK testing current HEAD f96eb53cbd76415edfba99c2cfa88567a885a428 testing commit f96eb53cbd76415edfba99c2cfa88567a885a428 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 9f87cb5afae69c34e2559d45dffb7cd1995e48dbf12d0cfd295ef44be8206499 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 27m25.466654635s (build: 14m36.204190519s, test: 12m28.252302341s) the crash still happens on HEAD commit msg: Linux 4.14.246 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout