bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207
building syzkaller on 06c27ff56b460864b5195bc0668d1d582df3cbf8
testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: e1bb0045970d7fb4f5cfddc3ee0ea6f66c5b475fbba8586c1d5a52b9420bc173
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 __blkdev_get
run #4: crashed: INFO: task hung in blkdev_reread_part
run #5: crashed: INFO: task hung in __blkdev_get
run #6: crashed: INFO: task hung in __blkdev_get
run #7: crashed: INFO: task hung in __blkdev_get
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 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_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_open
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 cd529693461026636f76d0395a42cb2439bbd368
testing commit cd529693461026636f76d0395a42cb2439bbd368
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: bee3032418b500b9b807331f03b55a9cd5795814245d2b026f17f12b8554f076
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 29m53.216351149s (build: 19m1.133716303s, test: 10m8.261863803s)
the crash still happens on HEAD
commit msg: Linux 4.14.253
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout