bisecting fixing commit since 5b7a52cd2eef952cee8a72512ef370bcdef46636
building syzkaller on 94942294277bf7550b12322d282159551521258b
testing commit 5b7a52cd2eef952cee8a72512ef370bcdef46636
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 2d10388c97a6309ad01441e5f9bfc0a0bd3b156f20c3aa219072d9e31b1a2c22
run #0: crashed: possible deadlock in blkdev_put
run #1: crashed: possible deadlock in __get_super
run #2: crashed: possible deadlock in blkdev_put
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 blkdev_put
run #9: crashed: INFO: task hung in blkdev_put
run #10: crashed: INFO: task hung in blkdev_put
run #11: crashed: INFO: task hung in blkdev_put
run #12: crashed: INFO: task hung in __get_super
run #13: crashed: INFO: task hung in __get_super
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 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 162b95d01320370b80cb2d5724cea4ae538ac740
testing commit 162b95d01320370b80cb2d5724cea4ae538ac740
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 3e9b19fc0c9d7bf49bb6c5f4daf14a50727626bc5788266c716068761f3ec9b2
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 29m1.548997227s (build: 18m8.801427631s, test: 10m23.526779663s)
the crash still happens on HEAD
commit msg: Linux 4.14.244
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout