bisecting fixing commit since 1752938529c614a8ed4432ecce6ebc95d3b87207
building syzkaller on c104d4a3bfc1f83e7ed33b4dca70e099402ce39f
testing commit 1752938529c614a8ed4432ecce6ebc95d3b87207
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: cf29d649f46b9ce6d1bc5c633c92fb9ea38f85b6f5686c79135c44b5c2141df5
all runs: crashed: INFO: task hung in sync_inodes_sb
testing current HEAD 964f3712e6a7447d9d3203f2be3f6c50e78ea179
testing commit 964f3712e6a7447d9d3203f2be3f6c50e78ea179
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: b429a17c3222a1d980b7382559f5b25eec655d6a7c4c6525bac51cb6d6583e3b
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 30m51.562381621s (build: 19m48.490398953s, test: 10m36.485081449s)
the crash still happens on HEAD
commit msg: Linux 4.14.240
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout