bisecting fixing commit since 3ffe1e79c174b2093f7ee3df589a7705572c9620
building syzkaller on faeffb0030134849d132c0040f330500e9056b24
testing commit 3ffe1e79c174b2093f7ee3df589a7705572c9620 with gcc (GCC) 8.1.0
kernel signature: 709095b6147d3405e5d03fa14c13a6d3f05d2ddf3eec7a1aa4a9e14227f77b6a
run #0: crashed: WARNING in __vb2_queue_cancel
run #1: crashed: WARNING in __vb2_queue_cancel
run #2: crashed: INFO: task hung in vivid_stop_generating_vid_cap
run #3: crashed: INFO: task hung in vivid_stop_generating_vid_cap
run #4: crashed: INFO: task hung in vivid_stop_generating_vid_cap
run #5: crashed: INFO: task hung in vivid_stop_generating_vid_cap
run #6: crashed: INFO: task hung in vivid_stop_generating_vid_cap
run #7: crashed: INFO: task hung in vivid_stop_generating_vid_cap
run #8: crashed: INFO: task hung in vivid_stop_generating_vid_cap
run #9: crashed: INFO: task hung in vivid_stop_generating_vid_cap
testing current HEAD 4139fb08c05fec734f85a99e8b7d99dc12b1b68c
testing commit 4139fb08c05fec734f85a99e8b7d99dc12b1b68c with gcc (GCC) 8.1.0
kernel signature: 19b49654863176c7f1411cf87a0f774b63bdb3e8b54aa4d7cc51324a1de3011f
all runs: boot failed: WARNING in kvm_mmu_set_mmio_spte_mask
revisions tested: 2, total time: 34m21.423019505s (build: 15m14.636882177s, test: 18m16.432636506s)
bisection is inconclusive, the first good commit could be any of:
3ffe1e79c174b2093f7ee3df589a7705572c9620
4139fb08c05fec734f85a99e8b7d99dc12b1b68c