bisecting fixing commit since d7e78d08fa77acdea351c8f628f49ca9a0e1029a
building syzkaller on d5a3ae1f760e7cb2cd5a721d9645ae22eae114fe
testing commit d7e78d08fa77acdea351c8f628f49ca9a0e1029a with gcc (GCC) 8.4.1 20210217
kernel signature: 7911c76c0835773008b3ad607f9369b1d58d61290231291a2cba1f6145b04f2c
run #0: crashed: INFO: task hung in __blkdev_get
run #1: crashed: INFO: task hung in lo_ioctl
run #2: crashed: INFO: task hung in __blkdev_get
run #3: crashed: INFO: task hung in lo_ioctl
run #4: crashed: INFO: task hung in lo_ioctl
run #5: crashed: INFO: task hung in lo_ioctl
run #6: crashed: INFO: task hung in lo_ioctl
run #7: crashed: INFO: task hung in __blkdev_get
run #8: crashed: INFO: task hung in lo_ioctl
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 lo_ioctl
run #14: crashed: INFO: task hung in lo_ioctl
run #15: crashed: INFO: task hung in blkdev_put
run #16: crashed: INFO: task hung in lo_ioctl
run #17: crashed: INFO: task hung in __blkdev_get
run #18: crashed: INFO: task hung in __blkdev_get
run #19: crashed: INFO: task hung in lo_ioctl
testing current HEAD cfb41ef9deb1e6572ac218ddfcec9567e5d1c101
testing commit cfb41ef9deb1e6572ac218ddfcec9567e5d1c101 with gcc (GCC) 8.4.1 20210217
kernel signature: 5a8ef7766b481d9cb8fdc6032ebc3bcbed76c3cfd2ffef7301b009f937cb271e
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 26m7.907257517s (build: 15m47.807083633s, test: 9m58.095959254s)
the crash still happens on HEAD
commit msg: Linux 4.14.237
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: hci0 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout