bisecting fixing commit since 3f2ecb86cb909da0b9157fd2952ad79924cbe5ae building syzkaller on c2c1d1dd603b7d66d283253ffbd61b8692712bd2 testing commit 3f2ecb86cb909da0b9157fd2952ad79924cbe5ae compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: e8b7b802b7ce8271fb6d96124087c5f44d1b9a2ba070316eae292b5197b0578d run #0: crashed: inconsistent lock state in free_huge_page run #1: crashed: inconsistent lock state in free_huge_page run #2: crashed: inconsistent lock state in free_huge_page run #3: crashed: possible deadlock in sk_clone_lock 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: possible deadlock in sk_clone_lock run #15: crashed: inconsistent lock state in free_huge_page run #16: crashed: inconsistent lock state in free_huge_page run #17: crashed: possible deadlock in sk_clone_lock run #18: crashed: possible deadlock in sk_clone_lock run #19: crashed: possible deadlock in sk_clone_lock testing current HEAD a35d65bedfbc38cffe2701798cd6810bbdf07892 testing commit a35d65bedfbc38cffe2701798cd6810bbdf07892 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 4587ddb2c410ade4f7be99e4285fd1233d731213377cb1ae793c33f539385bad all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 30m15.567182933s (build: 17m18.544444405s, test: 12m31.233384387s) the crash still happens on HEAD commit msg: Linux 4.14.267 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci1 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: hci4 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci5 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 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout