bisecting fixing commit since 01fd1694b93c92ad54fa684dac9c8068ecda8288
building syzkaller on 040fda588472da50749a3f605e183ad5c02104f4
testing commit 01fd1694b93c92ad54fa684dac9c8068ecda8288 with gcc (GCC) 8.1.0
kernel signature: 415505ed7731328b5c53aac78786611944095d5a55fb724131aec99720597222
all runs: crashed: possible deadlock in perf_event_ctx_lock_nested
testing current HEAD 4139fb08c05fec734f85a99e8b7d99dc12b1b68c
testing commit 4139fb08c05fec734f85a99e8b7d99dc12b1b68c with gcc (GCC) 8.1.0
kernel signature: 2628422cb27afe7c933efcdcd20c16d8401cc2b0059ce364a994ee97497e1dc2
all runs: boot failed: WARNING in kvm_mmu_set_mmio_spte_mask
revisions tested: 2, total time: 29m21.440480941s (build: 15m18.880464054s, test: 13m35.936536419s)
bisection is inconclusive, the first good commit could be any of:
01fd1694b93c92ad54fa684dac9c8068ecda8288
4139fb08c05fec734f85a99e8b7d99dc12b1b68c