bisecting fixing commit since 2c8a3fceddf0dd87f278e7a5e01350f86f844b1c
building syzkaller on fc9fd31ee7998c8b747752791000ea4eef07b5c6
testing commit 2c8a3fceddf0dd87f278e7a5e01350f86f844b1c with gcc (GCC) 8.4.1 20210217
kernel signature: 3f29e6d5ff01e86b00307cf3c5ce0ae768ffa07a60a8cc33ca13f9eefc05932a
run #0: crashed: INFO: task hung in usb_bulk_msg
run #1: crashed: INFO: task hung in usb_bulk_msg
run #2: crashed: INFO: task hung in usb_bulk_msg
run #3: crashed: INFO: task hung in usb_bulk_msg
run #4: crashed: INFO: task hung in usb_bulk_msg
run #5: crashed: INFO: task hung in usb_bulk_msg
run #6: crashed: INFO: task hung in usb_bulk_msg
run #7: crashed: INFO: task hung in usb_bulk_msg
run #8: crashed: INFO: task hung in usb_bulk_msg
run #9: crashed: INFO: task hung in usb_bulk_msg
run #10: crashed: INFO: task hung in usb_bulk_msg
run #11: crashed: INFO: task hung in usb_bulk_msg
run #12: crashed: INFO: task hung in usb_bulk_msg
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
testing current HEAD cfb41ef9deb1e6572ac218ddfcec9567e5d1c101
testing commit cfb41ef9deb1e6572ac218ddfcec9567e5d1c101 with gcc (GCC) 8.4.1 20210217
kernel signature: 4979d6ae0e835059b8bac9d71529adeb71fcab2269fe1ae49846dc15d3132abf
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 32m57.923351141s (build: 18m0.367689503s, test: 14m31.986034077s)
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: hci4 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout