bisecting fixing commit since 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
building syzkaller on f752fb536b579822da36383d50f78ff6f912a637
testing commit 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 91a1aa8290d57a567b81866815b33c362c6935141527289be8ea24efdaef9966
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD fa33f9094f36943ea32f7fbe323293b62e96151d
testing commit fa33f9094f36943ea32f7fbe323293b62e96151d
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 4651ccc75765aea1edafb6e9516afa8b59ef67edb9b2d351bedf5806752c8b2f
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 26m23.157901343s (build: 18m55.343758932s, test: 6m44.827997994s)
the crash still happens on HEAD
commit msg: Linux 4.14.268
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1