bisecting fixing commit since 5b7a52cd2eef952cee8a72512ef370bcdef46636
building syzkaller on be6b1582e9ce6f1ac5d8978e70a6a9f91113f238
testing commit 5b7a52cd2eef952cee8a72512ef370bcdef46636
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: ac33fadc09216dfcf2bbe12f2fdf840b48e5f0d6c54d29d396071c764aff802e
all runs: crashed: BUG: unable to handle kernel NULL pointer dereference in rhashtable_free_and_destroy
testing current HEAD 424a46ea058e160ae6fdd0693092ba79da533f26
testing commit 424a46ea058e160ae6fdd0693092ba79da533f26
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 9690f2927e7c2296561d3293147cc302c6d0f45c4a0355f011ea96a65373d674
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 23m59.787313754s (build: 16m40.845953252s, test: 6m46.30671924s)
the crash still happens on HEAD
commit msg: Linux 4.14.288
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