bisecting fixing commit since 0bddd227f3dc55975e2b8dfa7fc6f959b062a2c7
building syzkaller on bc238812ae6d1f5a7e99ff60b5b3089a73f1cfb3
testing commit 0bddd227f3dc55975e2b8dfa7fc6f959b062a2c7 with gcc (GCC) 8.4.1 20210217
kernel signature: bf492e817354b874897b1bd9a996982df10917e6213b1970c606a30cf4fe6d94
run #0: crashed: unregister_netdevice: waiting for DEV to become free
run #1: crashed: KASAN: use-after-free Read in netdevice_event_work_handler
run #2: crashed: general protection fault in free_netdev
run #3: crashed: KASAN: use-after-free Read in netdevice_event_work_handler
run #4: crashed: KASAN: use-after-free Read in netdevice_event_work_handler
run #5: crashed: KASAN: use-after-free Read in netdevice_event_work_handler
run #6: crashed: KASAN: use-after-free Read in netdevice_event_work_handler
run #7: crashed: general protection fault in free_netdev
run #8: crashed: KASAN: use-after-free Read in netdevice_event_work_handler
run #9: crashed: general protection fault in free_netdev
run #10: crashed: KASAN: use-after-free Read in netdevice_event_work_handler
run #11: crashed: KASAN: use-after-free Read in netdevice_event_work_handler
run #12: crashed: KASAN: use-after-free Read in netdevice_event_work_handler
run #13: crashed: KASAN: use-after-free Read in netdevice_event_work_handler
run #14: crashed: KASAN: use-after-free Read in netdevice_event_work_handler
run #15: crashed: general protection fault in free_netdev
run #16: crashed: general protection fault in free_netdev
run #17: crashed: general protection fault in free_netdev
run #18: OK
run #19: OK
testing current HEAD c2131f7e73c9e9365613e323d65c7b9e5b910f56
testing commit c2131f7e73c9e9365613e323d65c7b9e5b910f56 with gcc (GCC) 10.2.1 20210217
kernel signature: 69b626968dcbb6a25e9243ea2eb12e9bbb19f8bcc0693786345336b76ac5e5d3
run #0: crashed: unregister_netdevice: waiting for DEV to become free
run #1: OK
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
reproducer seems to be flaky
Reproducer flagged being flaky
revisions tested: 2, total time: 35m11.516282623s (build: 11m41.764257005s, test: 22m43.245918543s)
the crash still happens on HEAD
commit msg: Merge tag 'gfs2-v5.13-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for erspan0 to become free. Usage count = 3