bisecting fixing commit since b0cdffaa546e24acf92ab3b0d4e917a51aff6a82
building syzkaller on 4c04afaa19a16e90d8b495cc3795fd4ed21df4df
testing commit b0cdffaa546e24acf92ab3b0d4e917a51aff6a82
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 0d587deae861ce09f06c6dc821ff9f896d703dd8ee36f0f2a348e247cae3f039
all runs: crashed: general protection fault in ipt_init_target
testing current HEAD 66722c42ec916e92cadda46316f8f6e3fdcaedc6
testing commit 66722c42ec916e92cadda46316f8f6e3fdcaedc6
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 91491bff42b19cf504f27b9f048185ad2c67ca4e29f76bfe618551a4bc916f94
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 30m10.745976134s (build: 22m36.728996795s, test: 6m32.114346s)
the crash still happens on HEAD
commit msg: Linux 4.14.256
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1