bisecting fixing commit since b0cdffaa546e24acf92ab3b0d4e917a51aff6a82
building syzkaller on 4c04afaa19a16e90d8b495cc3795fd4ed21df4df
testing commit b0cdffaa546e24acf92ab3b0d4e917a51aff6a82
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 8857e9272346edb1fb613807f4db15f083222ea3bea8c001c3a58ace312cb90a
all runs: crashed: general protection fault in ipt_init_target
testing current HEAD 0447aa205abe1c0c016b4f7fa9d7c08d920b5c8e
testing commit 0447aa205abe1c0c016b4f7fa9d7c08d920b5c8e
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: a4550e47800e73322e6b912957437e7ac947129e111f65ce8616108ac5f84599
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 27m4.089800927s (build: 19m22.333121612s, test: 6m45.011564881s)
the crash still happens on HEAD
commit msg: Linux 4.14.254
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1