bisecting fixing commit since fbc5fe7a54d02e11972e3b2a5ddb6ffc88162c8f
building syzkaller on 0ecb9746a701be4544b845514a31a21cce92cc79
testing commit fbc5fe7a54d02e11972e3b2a5ddb6ffc88162c8f
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 7d1ba1844ccfdc152d53105d70e22ec4befb77df3fb9fa537bbfebfa5a4beb13
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 corrupted
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 cdev_del
run #15: crashed: general protection fault in corrupted
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 gsmld_close
run #19: crashed: general protection fault in cdev_del
testing current HEAD 162b95d01320370b80cb2d5724cea4ae538ac740
testing commit 162b95d01320370b80cb2d5724cea4ae538ac740
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: fc45cd3c7c9374c5e8ff59958d9d3fd81ec213a694855852df595fb3890d3adc
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 28m25.683088891s (build: 20m30.818952984s, test: 7m7.115964131s)
the crash still happens on HEAD
commit msg: Linux 4.14.244
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1