bisecting fixing commit since 7d7d1c0ab3eb7c8d8f63a126535018007823b207
building syzkaller on ca87309166a794a26d53a5720659e762c35f2253
testing commit 7d7d1c0ab3eb7c8d8f63a126535018007823b207
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: d1e61946c01ea8edbb927498645e6ca136ab0eacacf5a95251fe628400eddea3
all runs: crashed: possible deadlock in do_io_accounting
testing current HEAD 46914f96189be290174e378c6bf9ccadfdb9ca1e
testing commit 46914f96189be290174e378c6bf9ccadfdb9ca1e
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: ac56462c9de1f91b3904f013cb67d1b240292ca2e1f795996b140e3bb6b0c3e2
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 25m49.607334805s (build: 18m44.98304547s, test: 6m35.596300371s)
the crash still happens on HEAD
commit msg: Linux 4.14.243
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci5 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: 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 0x041b tx timeout
Bluetooth: hci1 command 0x041b 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 0x040f tx timeout
Bluetooth: hci0 command 0x040f 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
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout