bisecting fixing commit since f6e27dbb1afabcba436e346d6aa88a592a1436bb
building syzkaller on f3f7d9c8c3dfa1406a5f5a5f5f45a351f533139f
testing commit f6e27dbb1afabcba436e346d6aa88a592a1436bb with gcc (GCC) 8.4.1 20210217
kernel signature: 08922a38f0cbd9184b298b8591cbd62b90899d9303ce73f2f1ba9914646d5f8c
run #0: crashed: KASAN: use-after-free Read in nr_release
run #1: crashed: KASAN: use-after-free Read in nr_release
run #2: crashed: KASAN: use-after-free Read in nr_release
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: OK
run #9: OK
run #10: OK
run #11: OK
run #12: OK
run #13: OK
run #14: OK
run #15: OK
run #16: OK
run #17: OK
run #18: OK
run #19: OK
reproducer seems to be flaky
testing current HEAD 3d3abdc8ebd3c3082e4398fc73ceb4c852b66e85
testing commit 3d3abdc8ebd3c3082e4398fc73ceb4c852b66e85 with gcc (GCC) 8.4.1 20210217
kernel signature: e3cc0391ec40aae8caf19c2fd67a65baf4539fddf44f97a3c9619188b76b170f
all runs: crashed: unregister_netdevice: waiting for DEV to become free
Reproducer flagged being flaky
revisions tested: 2, total time: 31m32.103528378s (build: 17m48.788735815s, test: 13m1.168857951s)
the crash still happens on HEAD
commit msg: Linux 4.14.236
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1