bisecting fixing commit since 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
building syzkaller on d018dd31bfa66650daec4d49dc7b264a827e7834
testing commit 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 324c3c254df05d630111f79272db87e6c2f4ff9829934b8d5bc5d407470ce805
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD b8f3be299d5176348b15cc59d55b85faa3dece68
testing commit b8f3be299d5176348b15cc59d55b85faa3dece68
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 5672ffeded02ad01bf13fc296e275c8a53c4e29c8695506fa5c09249767b117a
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 29m47.187120571s (build: 22m18.313934111s, test: 6m32.9389746s)
the crash still happens on HEAD
commit msg: Linux 4.14.282
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