bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207
building syzkaller on 06c27ff56b460864b5195bc0668d1d582df3cbf8
testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 38306aee90641d37aa21c18f27848fb9b866ea2bc5ee36235d999ebd8a23bd03
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_get
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 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 __blkdev_get
run #11: crashed: INFO: task hung in __blkdev_get
run #12: crashed: INFO: task hung in __blkdev_get
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 __blkdev_get
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 66722c42ec916e92cadda46316f8f6e3fdcaedc6
testing commit 66722c42ec916e92cadda46316f8f6e3fdcaedc6
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: f7a3ef83b1763d1b7e5b718d34f5f0d864f254a3725fcfdc28dadd9a13f16eaa
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 25m53.450016068s (build: 14m53.527256134s, test: 10m27.760201399s)
the crash still happens on HEAD
commit msg: Linux 4.14.256
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout