bisecting fixing commit since 15a1c6b6f5162f7b70cf9a77cd8ed9771c1f0b53
building syzkaller on 131df97d431404458e805009bda794abfb00f45f
testing commit 15a1c6b6f5162f7b70cf9a77cd8ed9771c1f0b53
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 042b6fda115064c14b90de18418396862abe25ab0c1a829a8abff4b49159242d
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD f051383ef03bde49ca992f297ec80757a702e774
testing commit f051383ef03bde49ca992f297ec80757a702e774
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 34c469a13c27fc1aae74b013bd5cacdebf0cbd29ed0c956aac92089e59168a11
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 19m15.781411982s (build: 12m37.739508549s, test: 6m20.267443707s)
the crash still happens on HEAD
commit msg: Linux 4.14.285
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci0 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout