bisecting fixing commit since cf256fbcbe347b7d0ff58fe2dfa382a156bd3694 building syzkaller on 95777977ade5226323e35e6e5fa1594327640732 testing commit cf256fbcbe347b7d0ff58fe2dfa382a156bd3694 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 6d6a17881f8106a4cba5da3ed1fa62c16a7fab88988d3c8d0a5ef29bb19bb339 run #0: crashed: WARNING in kill_block_super run #1: crashed: WARNING in kill_block_super run #2: crashed: WARNING in getname_kernel run #3: crashed: WARNING in kill_block_super run #4: crashed: WARNING in kill_block_super run #5: crashed: WARNING in corrupted run #6: crashed: WARNING in kill_block_super run #7: crashed: WARNING in efs_kill_sb run #8: crashed: WARNING in efs_kill_sb run #9: crashed: WARNING in efs_kill_sb run #10: crashed: WARNING in kill_block_super run #11: crashed: WARNING in efs_kill_sb run #12: crashed: WARNING in efs_kill_sb run #13: crashed: WARNING in kill_block_super run #14: crashed: WARNING in kill_block_super run #15: crashed: WARNING in kill_block_super run #16: crashed: WARNING in efs_kill_sb run #17: crashed: WARNING in efs_kill_sb run #18: crashed: WARNING in efs_kill_sb run #19: crashed: WARNING in corrupted testing current HEAD dffb5c6ff09c51ed585e3e7665143df103867fc8 testing commit dffb5c6ff09c51ed585e3e7665143df103867fc8 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 839db7321e97ca994cab5be0f8fa656f5ec30c19d2be20b18a4b23cd471d9623 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 30m57.842277598s (build: 23m33.857825898s, test: 6m44.803985862s) the crash still happens on HEAD commit msg: Linux 4.14.280 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci1 command 0x0409 tx timeout Bluetooth: hci0 command 0x0409 tx timeout Bluetooth: hci2 command 0x0409 tx timeout unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 Bluetooth: hci2 command 0x041b tx timeout Bluetooth: hci0 command 0x041b tx timeout Bluetooth: hci1 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci3 command 0x041b tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci2 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: hci5 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout