bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207
building syzkaller on ed7d41c582d6f194ff35353d8bfdf7681dc0718e
testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: f142e8eb68f4747fb4141b6fef0df01d72f1e6d3b9b88b33986e4fae574e215c
run #0: crashed: INFO: task hung in lo_open
run #1: crashed: INFO: task hung in lo_open
run #2: crashed: INFO: task hung in lo_open
run #3: crashed: INFO: task hung in lo_release
run #4: crashed: INFO: task hung in lo_release
run #5: crashed: INFO: task hung in lo_open
run #6: crashed: INFO: task hung in lo_release
run #7: crashed: INFO: task hung in blkdev_reread_part
run #8: crashed: INFO: task hung in loop_control_ioctl
run #9: crashed: INFO: task hung in lo_open
run #10: crashed: INFO: task hung in lo_open
run #11: crashed: INFO: task hung in blkdev_reread_part
run #12: crashed: INFO: task hung in lo_open
run #13: crashed: INFO: task hung in lo_open
run #14: crashed: INFO: task hung in lo_open
run #15: crashed: INFO: task hung in lo_open
run #16: crashed: INFO: task hung in lo_release
run #17: crashed: INFO: task hung in lo_open
run #18: crashed: INFO: task hung in lo_open
run #19: crashed: INFO: task hung in lo_open
testing current HEAD 74766a973637a02c32c04c1c6496e114e4855239
testing commit 74766a973637a02c32c04c1c6496e114e4855239
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 4c10b51a98a972540123876312e0bfda480f4dcc546ea4ee802d77f8e84a3072
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 28m35.084170686s (build: 17m47.518378771s, test: 10m21.103546213s)
the crash still happens on HEAD
commit msg: Linux 4.14.275
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: hci3 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout