bisecting fixing commit since 3d3abdc8ebd3c3082e4398fc73ceb4c852b66e85
building syzkaller on 1ba81399e2d03b53a7e631c4ab05f25af1fb1911
testing commit 3d3abdc8ebd3c3082e4398fc73ceb4c852b66e85
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 1d9ac7ab6d443cfd2beb5e4971bfc88f8ca84a11ebcd0ae66de7d07303441282
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD 46914f96189be290174e378c6bf9ccadfdb9ca1e
testing commit 46914f96189be290174e378c6bf9ccadfdb9ca1e
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: a2e8649d58709fda6d4eb13e9633f2d620b5f14eb8ef1f7584ce9e5cae89cfb3
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 22m52.334873916s (build: 16m5.458774845s, test: 6m20.212234882s)
the crash still happens on HEAD
commit msg: Linux 4.14.243
crash: unregister_netdevice: waiting for DEV to become free
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci1 command 0x0419 tx timeout