bisecting fixing commit since b98aebd298246df37b472c52a2ee1023256d02e3
building syzkaller on 5ea87a6638e52a94361b26b8576a1605585815fb
testing commit b98aebd298246df37b472c52a2ee1023256d02e3
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: aeb42b73996a9ece33bb69afee27b507df4f2609ff5c42078aa405b7bd7cda3c
run #0: crashed: general protection fault in kernfs_kill_sb
run #1: crashed: general protection fault in kernfs_kill_sb
run #2: crashed: general protection fault in kernfs_kill_sb
run #3: crashed: general protection fault in kernfs_kill_sb
run #4: crashed: general protection fault in kernfs_kill_sb
run #5: crashed: general protection fault in kernfs_kill_sb
run #6: crashed: general protection fault in entry_SYSCALL_64_after_hwframe
run #7: crashed: general protection fault in kernfs_kill_sb
run #8: crashed: general protection fault in kernfs_kill_sb
run #9: crashed: general protection fault in kernfs_kill_sb
run #10: crashed: general protection fault in kernfs_kill_sb
run #11: crashed: general protection fault in kernfs_kill_sb
run #12: crashed: general protection fault in kernfs_kill_sb
run #13: crashed: general protection fault in kernfs_kill_sb
run #14: crashed: general protection fault in kernfs_kill_sb
run #15: crashed: general protection fault in kernfs_kill_sb
run #16: crashed: general protection fault in kernfs_kill_sb
run #17: crashed: general protection fault in kernfs_kill_sb
run #18: crashed: general protection fault in kernfs_kill_sb
run #19: crashed: general protection fault in kernfs_kill_sb
testing current HEAD 0447aa205abe1c0c016b4f7fa9d7c08d920b5c8e
testing commit 0447aa205abe1c0c016b4f7fa9d7c08d920b5c8e
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 880b0f09f398164930bd3703d7526f1c34a9f2614fbbe2414b8dad35ce35bd29
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 24m12.345755744s (build: 16m43.978774801s, test: 6m35.966160409s)
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