bisecting fixing commit since b98aebd298246df37b472c52a2ee1023256d02e3
building syzkaller on 5ea87a6638e52a94361b26b8576a1605585815fb
testing commit b98aebd298246df37b472c52a2ee1023256d02e3 with gcc (GCC) 8.4.1 20210217
kernel signature: 361a0d63502f2e34359c3d3cf6d313662d26934f62a45fda8443676ad543a7e1
run #0: crashed: possible deadlock in perf_event_release_kernel
run #1: crashed: possible deadlock in perf_event_release_kernel
run #2: crashed: possible deadlock in perf_event_release_kernel
run #3: crashed: possible deadlock in perf_event_release_kernel
run #4: crashed: possible deadlock in perf_event_release_kernel
run #5: crashed: possible deadlock in perf_event_release_kernel
run #6: crashed: possible deadlock in perf_read
run #7: crashed: possible deadlock in perf_event_release_kernel
run #8: crashed: possible deadlock in perf_event_release_kernel
run #9: crashed: possible deadlock in perf_event_release_kernel
run #10: crashed: possible deadlock in perf_event_release_kernel
run #11: crashed: possible deadlock in perf_read
run #12: crashed: possible deadlock in perf_read
run #13: crashed: possible deadlock in perf_event_release_kernel
run #14: crashed: possible deadlock in perf_event_release_kernel
run #15: crashed: possible deadlock in perf_read
run #16: crashed: possible deadlock in perf_event_release_kernel
run #17: crashed: possible deadlock in perf_read
run #18: crashed: possible deadlock in perf_read
run #19: crashed: possible deadlock in perf_event_release_kernel
testing current HEAD 4e68c9b0763ff55eaa69d6e519f07515f1c9037b
testing commit 4e68c9b0763ff55eaa69d6e519f07515f1c9037b with gcc (GCC) 8.4.1 20210217
kernel signature: 6d3b80b9eb81ce207c2ff8fc7d56b172ff05c958a7f7412faddee0640277edca
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 24m55.068503147s (build: 17m56.935516111s, test: 6m25.104553494s)
the crash still happens on HEAD
commit msg: Linux 4.14.239
crash: unregister_netdevice: waiting for DEV to become free
can: request_module (can-proto-0) failed.
can: request_module (can-proto-0) failed.
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1