bisecting fixing commit since 5b7a52cd2eef952cee8a72512ef370bcdef46636
building syzkaller on 94942294277bf7550b12322d282159551521258b
testing commit 5b7a52cd2eef952cee8a72512ef370bcdef46636
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 967a1c5b44dc76d20844780f4f0b2e753a24c84d48fc646c1164d375e4bea020
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 __get_super
run #4: crashed: possible deadlock in __get_super
run #5: crashed: possible deadlock in __get_super
run #6: crashed: possible deadlock in blkdev_put
run #7: crashed: possible deadlock in blkdev_put
run #8: crashed: possible deadlock in __get_super
run #9: crashed: possible deadlock in __get_super
run #10: crashed: possible deadlock in blkdev_put
run #11: crashed: possible deadlock in __get_super
run #12: crashed: possible deadlock in __get_super
run #13: crashed: possible deadlock in __get_super
run #14: crashed: possible deadlock in __get_super
run #15: crashed: possible deadlock in __get_super
run #16: crashed: INFO: task hung in blkdev_put
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 blkdev_put
testing current HEAD dffb5c6ff09c51ed585e3e7665143df103867fc8
testing commit dffb5c6ff09c51ed585e3e7665143df103867fc8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 071bdea341d000ff99820c78eaae604adfbaba1365775461fa035391ac135978
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 25m27.823406758s (build: 15m3.1644819s, test: 9m59.381539444s)
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: hci1 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci3 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: hci3 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: hci5 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 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