bisecting fixing commit since cf256fbcbe347b7d0ff58fe2dfa382a156bd3694 building syzkaller on 95777977ade5226323e35e6e5fa1594327640732 testing commit cf256fbcbe347b7d0ff58fe2dfa382a156bd3694 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 5d7ab0fb09c2891f2e420a3df720cbca316f7c5bf2a75dc783419e2db0eb2cc5 run #0: crashed: WARNING in kill_block_super run #1: crashed: WARNING in kill_block_super run #2: crashed: WARNING in kill_block_super run #3: crashed: WARNING in kill_block_super run #4: crashed: WARNING in sget run #5: crashed: WARNING in kill_block_super run #6: crashed: WARNING in efs_kill_sb run #7: crashed: WARNING in kill_block_super run #8: crashed: WARNING in kill_block_super run #9: crashed: WARNING in kill_block_super run #10: crashed: WARNING in kill_block_super run #11: crashed: WARNING in kill_block_super run #12: crashed: WARNING in kill_block_super run #13: crashed: WARNING in corrupted run #14: crashed: WARNING in corrupted run #15: crashed: WARNING in kill_block_super run #16: crashed: WARNING in kill_block_super run #17: crashed: WARNING in efs_kill_sb run #18: crashed: WARNING in efs_kill_sb run #19: crashed: WARNING in efs_kill_sb testing current HEAD 74766a973637a02c32c04c1c6496e114e4855239 testing commit 74766a973637a02c32c04c1c6496e114e4855239 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 21d012484b451e57112499e99e94d33ff5a7b52569fa938da578a0a5fb0c4aba all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 23m16.310304181s (build: 16m37.627950431s, test: 6m7.287167528s) the crash still happens on HEAD commit msg: Linux 4.14.275 crash: unregister_netdevice: waiting for DEV to become free Bluetooth: hci2 command 0x0409 tx timeout Bluetooth: hci4 command 0x0409 tx timeout Bluetooth: hci5 command 0x0409 tx timeout Bluetooth: hci3 command 0x0409 tx timeout Bluetooth: hci0 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: hci3 command 0x041b tx timeout Bluetooth: hci5 command 0x041b tx timeout Bluetooth: hci4 command 0x041b tx timeout Bluetooth: hci0 command 0x040f tx timeout Bluetooth: hci4 command 0x040f tx timeout Bluetooth: hci2 command 0x040f tx timeout Bluetooth: hci5 command 0x040f tx timeout Bluetooth: hci3 command 0x040f tx timeout Bluetooth: hci1 command 0x040f tx timeout Bluetooth: hci4 command 0x0419 tx timeout Bluetooth: hci1 command 0x0419 tx timeout Bluetooth: hci0 command 0x0419 tx timeout Bluetooth: hci3 command 0x0419 tx timeout Bluetooth: hci5 command 0x0419 tx timeout Bluetooth: hci2 command 0x0419 tx timeout