bisecting fixing commit since 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
building syzkaller on a938f0b814c3578d9608be02ef72b45d2b10cf4b
testing commit 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 4e041b91aac4d34218df6edbf9ef9126f30dcfcbe304239a5733f81d8391098d
all runs: crashed: unregister_netdevice: waiting for DEV to become free
testing current HEAD eb045674aab31aa55a4f9aec27cce36e3d946a21
testing commit eb045674aab31aa55a4f9aec27cce36e3d946a21
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: f907bc11a74d262dbc1f25c6b1ae8a8a8ef2f6dcdc454c1556d5d4bb5b5b9a3e
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 30m19.064850103s (build: 22m38.076041766s, test: 7m10.591656017s)
the crash still happens on HEAD
commit msg: Linux 4.14.272
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1