bisecting fixing commit since 6b6446efedb27c2766745a04f9b5d4449f51391d
building syzkaller on cba33199be220cbf61f7c0c8223d88a25a913d6f
testing commit 6b6446efedb27c2766745a04f9b5d4449f51391d
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 2413d2c28a33cabc87d4eba294515a3ff9b38ac5a35d0c6903dd83615c63a3cb
run #0: crashed: possible deadlock in __get_super
run #1: crashed: possible deadlock in blkdev_put
run #2: crashed: possible deadlock in __get_super
run #3: crashed: possible deadlock in blkdev_put
run #4: crashed: possible deadlock in __get_super
run #5: crashed: possible deadlock in __get_super
run #6: crashed: possible deadlock in __get_super
run #7: crashed: possible deadlock in __get_super
run #8: crashed: possible deadlock in __get_super
run #9: crashed: possible deadlock in __get_super
run #10: crashed: possible deadlock in __get_super
run #11: crashed: INFO: task hung in blkdev_put
run #12: crashed: INFO: task hung in blkdev_put
run #13: crashed: INFO: task hung in blkdev_put
run #14: crashed: INFO: task hung in blkdev_put
run #15: crashed: INFO: task hung in blkdev_put
run #16: crashed: INFO: task hung in __get_super
run #17: crashed: INFO: task hung in blkdev_put
run #18: crashed: INFO: task hung in blkdev_put
run #19: crashed: INFO: task hung in __get_super
testing current HEAD 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
testing commit 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: a5ace9a67dd2ad3c3462e9ca273c446bd1e509d0ed7d580f43c2bfbde69c1f39
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 27m7.485847487s (build: 16m20.335694895s, test: 10m14.479790291s)
the crash still happens on HEAD
commit msg: Linux 4.14.258
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout