bisecting fixing commit since 27ce4f2a6817e38ca74c643d47a96359f6cc0c1c building syzkaller on 1bf9a662c66aa432ff2fe3bf2562578cef626c09 testing commit 27ce4f2a6817e38ca74c643d47a96359f6cc0c1c compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 98fb808629a951943ff0e08aa5f636e140ac26c06adacf16b698708248ba17ab all runs: crashed: INFO: trying to register non-static key in skb_dequeue testing current HEAD 424a46ea058e160ae6fdd0693092ba79da533f26 testing commit 424a46ea058e160ae6fdd0693092ba79da533f26 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 5cb93962ec9838ab594649ed14fe03b7bf27e34e0f036cd9a4d1089819216864 all runs: crashed: unregister_netdevice: waiting for DEV to become free revisions tested: 2, total time: 32m43.626466594s (build: 24m59.599785009s, test: 6m46.397822029s) 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