bisecting fixing commit since 68d7a45eec101bc1550294c0e675a490c047b2e5 building syzkaller on 0a77c33cff83d9aa86d9043a7bb4e51512bf3222 testing commit 68d7a45eec101bc1550294c0e675a490c047b2e5 with gcc (GCC) 8.1.0 kernel signature: 14e5ec5263aff2293793c1152549d9d767ea2d4f9d59c4cdf51da0db07f82385 all runs: crashed: WARNING in handle_ept_misconfig testing current HEAD 01364dad1d4577e27a57729d41053f661bb8a5b9 testing commit 01364dad1d4577e27a57729d41053f661bb8a5b9 with gcc (GCC) 8.1.0 kernel signature: 4e02d967e8c8beb66d06cc462cc3bc594c36166218ace021a9c306d3df62dbfb run #0: crashed: WARNING in handle_ept_misconfig run #1: crashed: INFO: task hung in kvm_mmu_pre_destroy_vm run #2: crashed: WARNING in handle_ept_misconfig run #3: crashed: WARNING in handle_ept_misconfig run #4: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor790766596" "root@10.128.0.199:./syz-executor790766596"]: exit status 1 ssh: connect to host 10.128.0.199 port 22: Connection timed out lost connection run #5: basic kernel testing failed: failed to copy test binary to VM: failed to run ["scp" "-P" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "BatchMode=yes" "-o" "IdentitiesOnly=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "-i" "/syzkaller/jobs/linux/workdir/image/key" "/tmp/syz-executor160722749" "root@10.128.0.186:./syz-executor160722749"]: exit status 1 ssh: connect to host 10.128.0.186 port 22: Connection timed out lost connection run #6: crashed: WARNING in handle_ept_misconfig run #7: crashed: WARNING in handle_ept_misconfig run #8: OK run #9: OK revisions tested: 2, total time: 32m1.683405288s (build: 15m57.859197558s, test: 15m33.077866989s) the crash still happens on HEAD commit msg: Linux 4.14.174 crash: WARNING in handle_ept_misconfig bond0 (unregistering): Releasing backup interface bond_slave_1 bond0 (unregistering): Releasing backup interface bond_slave_0 bond0 (unregistering): Released all slaves ------------[ cut here ]------------ WARNING: CPU: 0 PID: 822 at arch/x86/kvm/vmx.c:6984 handle_ept_misconfig+0x96/0x3a0 arch/x86/kvm/vmx.c:6980 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 822 Comm: syz-executor966 Not tainted 4.14.174-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xf7/0x13b lib/dump_stack.c:58 panic+0x1b0/0x36a kernel/panic.c:183 __warn.cold.8+0x25/0x2a kernel/panic.c:547 report_bug+0x1a4/0x1f3 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:177 [inline] do_error_trap+0x1bd/0x310 arch/x86/kernel/traps.c:295 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:963 RIP: 0010:handle_ept_misconfig+0x96/0x3a0 arch/x86/kvm/vmx.c:6984 RSP: 0018:ffff8880a15cf9a0 EFLAGS: 00010282 RAX: 00000000fffffff2 RBX: ffff8880894297c0 RCX: 0000000000000000 RDX: ffffed10142b9ef8 RSI: 0000000000000000 RDI: ffffed10142b9f20 RBP: ffff8880a15cf9c8 R08: 0000000000000007 R09: ffff8880a15cf860 R10: 0000000000000000 R11: 0000000000000303 R12: 000000000000f000 R13: 0000000000000031 R14: 0000000000000000 R15: 0000000000000000 vmx_handle_exit+0x1b8/0x1160 arch/x86/kvm/vmx.c:9215 vcpu_enter_guest+0xe05/0x4e40 arch/x86/kvm/x86.c:7316 vcpu_run arch/x86/kvm/x86.c:7379 [inline] kvm_arch_vcpu_ioctl_run+0x257/0xed0 arch/x86/kvm/x86.c:7546 kvm_vcpu_ioctl+0x45e/0xb60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2661 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x183/0xfc0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x74/0x80 fs/ioctl.c:692 do_syscall_64+0x1c9/0x5b0 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x44abe9 RSP: 002b:00007f0a30f12ce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000006dfc48 RCX: 000000000044abe9 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 RBP: 00000000006dfc40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dfc4c R13: 00007ffd5553c19f R14: 00007f0a30f139c0 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds..