bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207
building syzkaller on ed7d41c582d6f194ff35353d8bfdf7681dc0718e
testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: afea9405267f2c1e582c8c56f33caa4ff4588cc849174112b5af638ff9dbaf7a
run #0: crashed: INFO: task hung in blkdev_put
run #1: crashed: INFO: task hung in __blkdev_get
run #2: crashed: INFO: task hung in loop_control_ioctl
run #3: crashed: INFO: task hung in lo_open
run #4: crashed: INFO: task hung in lo_open
run #5: crashed: INFO: task hung in lo_release
run #6: crashed: INFO: task hung in lo_open
run #7: crashed: INFO: task hung in lo_open
run #8: crashed: INFO: task hung in lo_open
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 lo_open
run #12: crashed: INFO: task hung in lo_open
run #13: crashed: INFO: task hung in lo_release
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_open
run #17: crashed: INFO: task hung in loop_control_ioctl
run #18: crashed: INFO: task hung in lo_open
run #19: crashed: INFO: task hung in lo_open
testing current HEAD 84bae26850e3b384a45f0f9a5f8b3b5983afacd8
testing commit 84bae26850e3b384a45f0f9a5f8b3b5983afacd8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: ef21ae4244c70ba7f31858726554205270b862a5e3af83ebec28ba3dc2ba518d
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 29m2.040122646s (build: 18m19.74317127s, test: 10m11.201134365s)
the crash still happens on HEAD
commit msg: Linux 4.14.284
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci5 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: hci1 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout