bisecting fixing commit since f79dc86058bc0c8317eea2a0f968382c6ffb0cfb
building syzkaller on 65a7a8540d29e72622fca06522587f7e66539fd3
testing commit f79dc86058bc0c8317eea2a0f968382c6ffb0cfb
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 8409edf921b8d6dd27bd6105d1787b67ff54bff919c3c2232a0cb30d91db89a6
run #0: crashed: INFO: task hung in __blkdev_get
run #1: crashed: INFO: task hung in __blkdev_get
run #2: crashed: INFO: task hung in __blkdev_get
run #3: crashed: INFO: task hung in __get_super
run #4: crashed: INFO: task hung in __get_super
run #5: crashed: INFO: task hung in __get_super
run #6: crashed: INFO: task hung in __get_super
run #7: crashed: INFO: task hung in lo_ioctl
run #8: crashed: INFO: task hung in __blkdev_get
run #9: crashed: INFO: task hung in __blkdev_get
run #10: crashed: INFO: task hung in __blkdev_get
run #11: crashed: INFO: task hung in lo_ioctl
run #12: crashed: INFO: task hung in __blkdev_get
run #13: crashed: INFO: task hung in __blkdev_get
run #14: crashed: INFO: task hung in lo_ioctl
run #15: crashed: INFO: task hung in __get_super
run #16: crashed: INFO: task hung in __get_super
run #17: crashed: INFO: task hung in lo_ioctl
run #18: crashed: INFO: task hung in lo_ioctl
run #19: crashed: INFO: task hung in lo_ioctl
testing current HEAD f96eb53cbd76415edfba99c2cfa88567a885a428
testing commit f96eb53cbd76415edfba99c2cfa88567a885a428
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: eb6fb75f5b17f06f2238a46e4c334b4e3ed7321fdae0d9284cc385b1593bb001
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 25m54.510475148s (build: 15m3.926020867s, test: 10m18.832504051s)
the crash still happens on HEAD
commit msg: Linux 4.14.246
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout