bisecting fixing commit since 4f68020fef1c6cf1b680ffb6481ac41379283ea3
building syzkaller on a0331e89e036103c95eb898742ea5d5f28a987b0
testing commit 4f68020fef1c6cf1b680ffb6481ac41379283ea3 with gcc (GCC) 8.1.0
kernel signature: 1c92ae34712ee94d93a8bb87f7c47767c246e210903ac4249acac03cbbf47d2e
all runs: crashed: KASAN: use-after-free Read in qfq_find_class
testing current HEAD 4139fb08c05fec734f85a99e8b7d99dc12b1b68c
testing commit 4139fb08c05fec734f85a99e8b7d99dc12b1b68c with gcc (GCC) 8.1.0
kernel signature: 9c91afb491c7313c4044ffe48e1af4e3e08ed67299b9fe1c6e16a1461cf83918
all runs: boot failed: WARNING in kvm_mmu_set_mmio_spte_mask
revisions tested: 2, total time: 29m54.699934659s (build: 15m39.645217989s, test: 13m51.810923151s)
bisection is inconclusive, the first good commit could be any of:
4f68020fef1c6cf1b680ffb6481ac41379283ea3
4139fb08c05fec734f85a99e8b7d99dc12b1b68c