bisecting fixing commit since 756db2ba8bde4ead58ceb54e9cbc71f526f9a98f
building syzkaller on 838e7e2cd9228583ca33c49a39aea4d863d3e36d
testing commit 756db2ba8bde4ead58ceb54e9cbc71f526f9a98f
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 3814a5870a4cc7838871e4382191beaeb1c805ae6cab05f2452ef48b45cfd6a3
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD c9fcc1545c3bb19f4e04b1c82bf5c2856fef39bd
testing commit c9fcc1545c3bb19f4e04b1c82bf5c2856fef39bd
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 47eb22c56e3dfe4255da7a55e6f6f5bff23f939d1b5adbf1735ccd6adcc11d88
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 28m14.528876859s (build: 21m18.953562618s, test: 6m19.621252028s)
the crash still happens on HEAD
commit msg: Linux 4.14.270
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1
Bluetooth: hci1 command 0x0409 tx timeout
Bluetooth: hci0 command 0x0409 tx timeout
Bluetooth: hci3 command 0x0409 tx timeout
Bluetooth: hci5 command 0x0409 tx timeout
Bluetooth: hci4 command 0x0409 tx timeout
Bluetooth: hci2 command 0x0409 tx timeout
Bluetooth: hci0 command 0x041b tx timeout
Bluetooth: hci1 command 0x041b tx timeout
Bluetooth: hci2 command 0x041b tx timeout
Bluetooth: hci4 command 0x041b tx timeout
Bluetooth: hci5 command 0x041b tx timeout
Bluetooth: hci3 command 0x041b tx timeout
Bluetooth: hci0 command 0x040f tx timeout
Bluetooth: hci1 command 0x040f tx timeout
Bluetooth: hci3 command 0x040f tx timeout
Bluetooth: hci5 command 0x040f tx timeout
Bluetooth: hci4 command 0x040f tx timeout
Bluetooth: hci2 command 0x040f tx timeout
Bluetooth: hci1 command 0x0419 tx timeout
Bluetooth: hci0 command 0x0419 tx timeout
Bluetooth: hci2 command 0x0419 tx timeout
Bluetooth: hci4 command 0x0419 tx timeout
Bluetooth: hci5 command 0x0419 tx timeout
Bluetooth: hci3 command 0x0419 tx timeout