bisecting fixing commit since aea8526edf59da3ff5306ca408e13d8f6ab89b34
building syzkaller on 8304907db07a4c6f7ef3164be77c1bacc94d6d51
testing commit aea8526edf59da3ff5306ca408e13d8f6ab89b34 with gcc (GCC) 8.1.0
kernel signature: 722d4fe4c14aaa30680f21ed75b585c7ffcc2948b55fffb24cbc0c396178df62
all runs: crashed: WARNING: refcount bug in l2tp_session_create
testing current HEAD 56dfe6252c6823c486ce4b1a922d72abc7e3c6b1
testing commit 56dfe6252c6823c486ce4b1a922d72abc7e3c6b1 with gcc (GCC) 8.1.0
kernel signature: fb5e4abe0587628628ed53e2413732cd2f15410339f69232a50407e74ffb6f7a
all runs: boot failed: WARNING in kvm_mmu_set_mmio_spte_mask
revisions tested: 2, total time: 29m56.521244017s (build: 15m21.537856067s, test: 13m43.060630193s)
bisection is inconclusive, the first good commit could be any of:
aea8526edf59da3ff5306ca408e13d8f6ab89b34
56dfe6252c6823c486ce4b1a922d72abc7e3c6b1