bisecting fixing commit since 3f2ecb86cb909da0b9157fd2952ad79924cbe5ae building syzkaller on c2c1d1dd603b7d66d283253ffbd61b8692712bd2 testing commit 3f2ecb86cb909da0b9157fd2952ad79924cbe5ae compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: fd252ff769ebeacc2a9bec4d76f6d53f724096a8fc85fbf7d73270904827bc4b 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: possible deadlock in sk_clone_lock 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: possible deadlock in sk_clone_lock run #16: crashed: possible deadlock in sk_clone_lock 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 4ba8e26127c393c32776dff6d79c5b82de6dc542 testing commit 4ba8e26127c393c32776dff6d79c5b82de6dc542 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 4f13102785ecf3f442b2c2ab71d8b9e85b683ada4a7dd1ceb3d64abb78c99f87 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 33m35.413127196s (build: 20m51.173975946s, test: 12m18.151558838s) the crash still happens on HEAD commit msg: Linux 4.14.262 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout