bisecting fixing commit since 3f2ecb86cb909da0b9157fd2952ad79924cbe5ae building syzkaller on c2c1d1dd603b7d66d283253ffbd61b8692712bd2 testing commit 3f2ecb86cb909da0b9157fd2952ad79924cbe5ae compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: add46e1752c0aa44170887b87761caa31c85e398f51523ef27286fbfec6c4e6d run #0: crashed: inconsistent lock state in free_huge_page run #1: crashed: inconsistent lock state in free_huge_page run #2: crashed: possible deadlock in sk_clone_lock run #3: crashed: inconsistent lock state in free_huge_page run #4: crashed: inconsistent lock state in free_huge_page run #5: crashed: inconsistent lock state in free_huge_page run #6: crashed: inconsistent lock state in free_huge_page run #7: crashed: inconsistent lock state in free_huge_page run #8: crashed: inconsistent lock state in free_huge_page run #9: crashed: inconsistent lock state in free_huge_page run #10: crashed: inconsistent lock state in free_huge_page run #11: crashed: inconsistent lock state in free_huge_page run #12: crashed: inconsistent lock state in free_huge_page run #13: crashed: inconsistent lock state in free_huge_page run #14: crashed: inconsistent lock state in free_huge_page run #15: crashed: inconsistent lock state in free_huge_page run #16: crashed: inconsistent lock state in free_huge_page run #17: crashed: inconsistent lock state in free_huge_page run #18: crashed: possible deadlock in sk_clone_lock run #19: crashed: possible deadlock in sk_clone_lock testing current HEAD 162b95d01320370b80cb2d5724cea4ae538ac740 testing commit 162b95d01320370b80cb2d5724cea4ae538ac740 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 8762ceb8b63d7f9bab955b5f6d9987206f2c5370dc1131182e95e6c9b88c02bb all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 30m21.623468046s (build: 17m42.374134154s, test: 12m11.175394733s) the crash still happens on HEAD commit msg: Linux 4.14.244 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci1 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: hci3 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci5 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