bisecting fixing commit since f79dc86058bc0c8317eea2a0f968382c6ffb0cfb
building syzkaller on 65a7a8540d29e72622fca06522587f7e66539fd3
testing commit f79dc86058bc0c8317eea2a0f968382c6ffb0cfb with gcc (GCC) 8.4.1 20210217
kernel signature: 58e263547156de7ef56cd84bbffcd25a8aa824852b8e310b134b795fd5ccb107
run #0: crashed: INFO: task hung in __get_super
run #1: crashed: INFO: task hung in __get_super
run #2: crashed: INFO: task hung in lo_ioctl
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 __get_super
run #7: crashed: INFO: task hung in __get_super
run #8: crashed: INFO: task hung in lo_ioctl
run #9: crashed: INFO: task hung in __blkdev_get
run #10: crashed: INFO: task hung in lo_ioctl
run #11: crashed: INFO: task hung in __get_super
run #12: crashed: INFO: task hung in __blkdev_get
run #13: crashed: INFO: task hung in lo_ioctl
run #14: crashed: INFO: task hung in lo_ioctl
run #15: crashed: INFO: task hung in __blkdev_get
run #16: crashed: INFO: task hung in lo_ioctl
run #17: crashed: INFO: task hung in lo_ioctl
run #18: crashed: INFO: task hung in __get_super
run #19: crashed: INFO: task hung in __get_super
testing current HEAD 96afcb20f36f07683aaa342e592ea8ec76fd1fa6
testing commit 96afcb20f36f07683aaa342e592ea8ec76fd1fa6 with gcc (GCC) 8.4.1 20210217
kernel signature: f67ea499761346fd00784e6cb556c688d25492b6d9dcc4629fafc4f2a5f8ac6f
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 28m24.151416603s (build: 16m16.487627023s, test: 11m34.719811266s)
the crash still happens on HEAD
commit msg: Linux 4.14.233
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci5 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: hci0 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout