bisecting fixing commit since 2d2791fce891fc20709232d49a6bae075b9a77f8
building syzkaller on 52e3731913ab2677be27c29ed8142b04e8f28521
testing commit 2d2791fce891fc20709232d49a6bae075b9a77f8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 0a390b983a3492d1ae896ab0f0a763fd88242341d9950de379beaddb3b92a915
all runs: crashed: INFO: task hung in nbd_ioctl
testing current HEAD dffb5c6ff09c51ed585e3e7665143df103867fc8
testing commit dffb5c6ff09c51ed585e3e7665143df103867fc8
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: ba95c6febe55075c344f19f68981993eff205a13206f9f31176f6bc8a4bcf2e0
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 29m38.682426597s (build: 18m47.873203172s, test: 10m11.923048873s)
the crash still happens on HEAD
commit msg: Linux 4.14.280
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