bisecting fixing commit since 2c8a3fceddf0dd87f278e7a5e01350f86f844b1c
building syzkaller on fc9fd31ee7998c8b747752791000ea4eef07b5c6
testing commit 2c8a3fceddf0dd87f278e7a5e01350f86f844b1c
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: b976977744d1afa0a2987006bb02208ec3e84ece7e3bdf118b59539d30f988c7
all runs: crashed: BUG: looking up invalid subclass: NUM
testing current HEAD 84bae26850e3b384a45f0f9a5f8b3b5983afacd8
testing commit 84bae26850e3b384a45f0f9a5f8b3b5983afacd8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 753530a65e55c97a9989a32a05e41c3f9e0264446329df5b01fa973a8f27cf5c
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 22m46.477960874s (build: 15m46.951419765s, test: 6m31.845159015s)
the crash still happens on HEAD
commit msg: Linux 4.14.284
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