bisecting fixing commit since cf256fbcbe347b7d0ff58fe2dfa382a156bd3694 building syzkaller on 95777977ade5226323e35e6e5fa1594327640732 testing commit cf256fbcbe347b7d0ff58fe2dfa382a156bd3694 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 156d38beb593ee1680767f37ff42862f4402bf745d5765eec725b777ff00d266 run #0: crashed: WARNING in corrupted run #1: crashed: WARNING in efs_kill_sb run #2: crashed: WARNING in kill_block_super run #3: crashed: WARNING in corrupted run #4: crashed: WARNING in efs_kill_sb run #5: crashed: WARNING in efs_kill_sb run #6: crashed: WARNING in corrupted run #7: crashed: WARNING in kill_block_super run #8: crashed: WARNING in kill_block_super run #9: crashed: WARNING in corrupted run #10: crashed: WARNING in kill_block_super run #11: crashed: WARNING in kill_block_super run #12: crashed: WARNING in corrupted run #13: crashed: WARNING in kill_block_super run #14: crashed: WARNING in corrupted run #15: crashed: WARNING in corrupted run #16: crashed: WARNING in efs_kill_sb run #17: crashed: WARNING in corrupted run #18: crashed: WARNING in kill_block_super run #19: crashed: WARNING in corrupted testing current HEAD 4ba8e26127c393c32776dff6d79c5b82de6dc542 testing commit 4ba8e26127c393c32776dff6d79c5b82de6dc542 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 41f416ed1348656d55004b8cbe5cc32520dbbb443825e28df767dc28885442a4 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 22m40.900495547s (build: 15m38.754807216s, test: 6m31.318931052s) the crash still happens on HEAD commit msg: Linux 4.14.262 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci2 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: hci2 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci3 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: hci5 command 0x0419 tx timeout