bisecting fixing commit since fbc5fe7a54d02e11972e3b2a5ddb6ffc88162c8f
building syzkaller on 0ecb9746a701be4544b845514a31a21cce92cc79
testing commit fbc5fe7a54d02e11972e3b2a5ddb6ffc88162c8f with gcc (GCC) 8.4.1 20210217
kernel signature: c35cce28d69aa8fe1a9fe755d32a64c64a9b159e5167ec1aea251c93bca81597
run #0: crashed: general protection fault in cdev_del
run #1: crashed: general protection fault in cdev_del
run #2: crashed: general protection fault in cdev_del
run #3: crashed: general protection fault in cdev_del
run #4: crashed: general protection fault in cdev_del
run #5: crashed: general protection fault in cdev_del
run #6: crashed: general protection fault in cdev_del
run #7: crashed: general protection fault in cdev_del
run #8: crashed: general protection fault in cdev_del
run #9: crashed: general protection fault in cdev_del
run #10: crashed: general protection fault in cdev_del
run #11: crashed: general protection fault in cdev_del
run #12: crashed: general protection fault in cdev_del
run #13: crashed: general protection fault in cdev_del
run #14: crashed: general protection fault in corrupted
run #15: crashed: general protection fault in cdev_del
run #16: crashed: general protection fault in cdev_del
run #17: crashed: general protection fault in cdev_del
run #18: crashed: general protection fault in cdev_del
run #19: crashed: general protection fault in corrupted
testing current HEAD 4e68c9b0763ff55eaa69d6e519f07515f1c9037b
testing commit 4e68c9b0763ff55eaa69d6e519f07515f1c9037b with gcc (GCC) 8.4.1 20210217
kernel signature: 7e359d7d7a648eef1eb58f7771d55167f02c7e56360052a483de0cce43eef50d
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 24m14.250306883s (build: 17m19.707883616s, test: 6m14.526771771s)
the crash still happens on HEAD
commit msg: Linux 4.14.239
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1