bisecting fixing commit since c6db52a88798e5a0dfef80041ad4d33cc8cf04eb
building syzkaller on e6b89e4e5adde15c0dc0a241e03dc215f2e249b3
testing commit c6db52a88798e5a0dfef80041ad4d33cc8cf04eb with gcc (GCC) 8.1.0
kernel signature: 099a7c1b5b8aaab24a12cbf052375e06387aeb0cdfe4d3b88deb674991a35add
run #0: crashed: INFO: task hung in pipe_write
run #1: crashed: INFO: task hung in pipe_write
run #2: crashed: INFO: task hung in pipe_write
run #3: crashed: INFO: task hung in pipe_write
run #4: crashed: INFO: task hung in pipe_write
run #5: crashed: INFO: task hung in pipe_write
run #6: crashed: INFO: task hung in pipe_write
run #7: crashed: INFO: task hung in pipe_read
run #8: OK
run #9: OK
testing current HEAD 4139fb08c05fec734f85a99e8b7d99dc12b1b68c
testing commit 4139fb08c05fec734f85a99e8b7d99dc12b1b68c with gcc (GCC) 8.1.0
kernel signature: 9eefbf9bed81b2b42b51b03d470340d86b453c1dd766709a3c576c49b85087d8
all runs: boot failed: WARNING in kvm_mmu_set_mmio_spte_mask
revisions tested: 2, total time: 37m14.850297025s (build: 16m2.755564738s, test: 20m42.146546619s)
bisection is inconclusive, the first good commit could be any of:
c6db52a88798e5a0dfef80041ad4d33cc8cf04eb
4139fb08c05fec734f85a99e8b7d99dc12b1b68c