bisecting fixing commit since 01364dad1d4577e27a57729d41053f661bb8a5b9
building syzkaller on 84f999d6319b21d9567132bf7ed26507f6d24310
testing commit 01364dad1d4577e27a57729d41053f661bb8a5b9 with gcc (GCC) 8.1.0
kernel signature: 8b2d8b38ad4970671d6ea0c54551061e74bffdee51e8a83426a43f104dc8851e
run #0: crashed: WARNING: held lock freed in pppol2tp_release
run #1: crashed: WARNING: held lock freed in pppol2tp_release
run #2: crashed: WARNING: held lock freed in pppol2tp_release
run #3: crashed: WARNING: held lock freed in pppol2tp_release
run #4: crashed: WARNING: held lock freed in pppol2tp_release
run #5: crashed: WARNING: held lock freed in pppol2tp_release
run #6: crashed: KASAN: use-after-free Read in l2tp_session_queue_purge
run #7: crashed: WARNING: held lock freed in pppol2tp_release
run #8: crashed: KASAN: use-after-free Read in l2tp_session_queue_purge
run #9: crashed: WARNING: held lock freed in pppol2tp_release
testing current HEAD 56dfe6252c6823c486ce4b1a922d72abc7e3c6b1
testing commit 56dfe6252c6823c486ce4b1a922d72abc7e3c6b1 with gcc (GCC) 8.1.0
kernel signature: a5a597e7843b0df4f8d0bdd4e34e7ff7853ecd03cad61b621ffdae91b78103d9
all runs: boot failed: WARNING in kvm_mmu_set_mmio_spte_mask
revisions tested: 2, total time: 33m14.772789026s (build: 17m57.501652334s, test: 13m58.698752362s)
bisection is inconclusive, the first good commit could be any of:
01364dad1d4577e27a57729d41053f661bb8a5b9
56dfe6252c6823c486ce4b1a922d72abc7e3c6b1