bisecting fixing commit since 5b7a52cd2eef952cee8a72512ef370bcdef46636
building syzkaller on 94942294277bf7550b12322d282159551521258b
testing commit 5b7a52cd2eef952cee8a72512ef370bcdef46636
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: b754512e84376067a6ea7e214b8222d5cdacbc7c76421ce87e207d946326459f
run #0: crashed: possible deadlock in blkdev_put
run #1: crashed: possible deadlock in __get_super
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 __get_super
run #7: crashed: possible deadlock in __get_super
run #8: crashed: possible deadlock in __get_super
run #9: crashed: possible deadlock in blkdev_put
run #10: crashed: possible deadlock in __get_super
run #11: crashed: possible deadlock in __get_super
run #12: crashed: possible deadlock in __get_super
run #13: crashed: possible deadlock in blkdev_put
run #14: crashed: possible deadlock in __get_super
run #15: crashed: INFO: task hung 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 __get_super
testing current HEAD 4ba8e26127c393c32776dff6d79c5b82de6dc542
testing commit 4ba8e26127c393c32776dff6d79c5b82de6dc542
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 3f8c3b52cbc03eb2dd28c3ad2e608fe5752c7a43e3c24762b4aefd18a5b7a069
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 29m53.361988578s (build: 19m2.302439536s, test: 10m24.831886096s)
the crash still happens on HEAD
commit msg: Linux 4.14.262
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
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: hci2 command 0x041b tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout