bisecting fixing commit since 8bac50406cca10a219aa899243d49c57ddaf7c5b
building syzkaller on 2e95ab335759ed7e1c246c2057c84d813a2c29e1
testing commit 8bac50406cca10a219aa899243d49c57ddaf7c5b with gcc (GCC) 8.1.0
kernel signature: 342b56e7268ed41210c182a7bcf420d33e337ca9b5c02d6784c7d0acb72789c3
all runs: crashed: WARNING in cbq_destroy_class
testing current HEAD 4139fb08c05fec734f85a99e8b7d99dc12b1b68c
testing commit 4139fb08c05fec734f85a99e8b7d99dc12b1b68c with gcc (GCC) 8.1.0
kernel signature: e6aec5931870424f49a3d27e7e221a75ba08a8e6ac6a0e7461c34fca7e80e917
all runs: boot failed: WARNING in kvm_mmu_set_mmio_spte_mask
revisions tested: 2, total time: 30m33.170703962s (build: 16m22.077824887s, test: 13m39.169379092s)
bisection is inconclusive, the first good commit could be any of:
8bac50406cca10a219aa899243d49c57ddaf7c5b
4139fb08c05fec734f85a99e8b7d99dc12b1b68c