bisecting fixing commit since 6b6446efedb27c2766745a04f9b5d4449f51391d building syzkaller on cba33199be220cbf61f7c0c8223d88a25a913d6f testing commit 6b6446efedb27c2766745a04f9b5d4449f51391d compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 7f11b164c41ab96b91347267fd90660f6d8e35a101c1d34b955718982772eeb1 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: crashed: WARNING in ieee80211_ibss_csa_beacon 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: OK run #18: OK run #19: crashed: WARNING in ieee80211_ibss_csa_beacon testing current HEAD 5f9f3b0057d5c5782985784ba0159b05b4083055 testing commit 5f9f3b0057d5c5782985784ba0159b05b4083055 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 4733a5124d973ac5d537bbbeba62e8f31b9327dadb52df2074036a59760f729e all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 31m59.783720639s (build: 18m54.409770811s, test: 12m36.946045765s) the crash still happens on HEAD commit msg: Linux 4.14.255 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout