bisecting fixing commit since dffb5c6ff09c51ed585e3e7665143df103867fc8
building syzkaller on cb1ac2e75516d296f0ed6884292eeb72916a6271
testing commit dffb5c6ff09c51ed585e3e7665143df103867fc8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 714bd0c2d6bbbe947071215dc5a792799fb65733a5329eaec1eeccb942f7c1e0
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD 424a46ea058e160ae6fdd0693092ba79da533f26
testing commit 424a46ea058e160ae6fdd0693092ba79da533f26
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: e310efb1083ad424211b185fe730b6eef1704aa342242eb90f5d65fb6e2a5f76
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 24m11.994059368s (build: 17m1.144080396s, test: 6m26.385576713s)
the crash still happens on HEAD
commit msg: Linux 4.14.288
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout