bisecting fixing commit since 68d7a45eec101bc1550294c0e675a490c047b2e5
building syzkaller on 0a77c33cff83d9aa86d9043a7bb4e51512bf3222
testing commit 68d7a45eec101bc1550294c0e675a490c047b2e5 with gcc (GCC) 8.1.0
kernel signature: c99a30d0f44e4fc8e726fe3ddb4e968be0e21760a4d2684912feca265912c4d1
all runs: crashed: WARNING in handle_ept_misconfig
testing current HEAD 5b7a52cd2eef952cee8a72512ef370bcdef46636
testing commit 5b7a52cd2eef952cee8a72512ef370bcdef46636 with gcc (GCC) 8.1.0
kernel signature: 6e1329fc0a1ca0e7c471760c7fc4ed19f7a7fbd2c195d76a9c7f8a1984657bd0
run #0: crashed: WARNING in handle_ept_misconfig
run #1: crashed: WARNING in handle_ept_misconfig
run #2: crashed: WARNING in handle_ept_misconfig
run #3: crashed: WARNING in handle_ept_misconfig
run #4: crashed: WARNING in handle_ept_misconfig
run #5: crashed: WARNING in handle_ept_misconfig
run #6: crashed: WARNING in handle_ept_misconfig
run #7: crashed: WARNING in handle_ept_misconfig
run #8: crashed: WARNING in handle_ept_misconfig
run #9: OK
revisions tested: 2, total time: 32m47.153772159s (build: 15m57.977775197s, test: 16m6.21720415s)
the crash still happens on HEAD
commit msg: Linux 4.14.202
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: 4704 at arch/x86/kvm/vmx.c:6952 handle_ept_misconfig+0x96/0x3a0 arch/x86/kvm/vmx.c:6948
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 4704 Comm: syz-executor400 Not tainted 4.14.202-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:964
RIP: 0010:handle_ept_misconfig+0x96/0x3a0 arch/x86/kvm/vmx.c:6952
RSP: 0018:ffff8880a4b579a0 EFLAGS: 00010282
RAX: 00000000fffffff2 RBX: ffff88809d371b40 RCX: 0000000000000000
RDX: ffffed101496aef8 RSI: 0000000000000000 RDI: ffffed101496af20
RBP: ffff8880a4b579c8 R08: 0000000000000007 R09: ffff8880a4b57860
R10: 0000000000000000 R11: 0000000000000303 R12: 000000000000f000
R13: 0000000000000031 R14: 0000000000000000 R15: 0000000000000000
 vmx_handle_exit+0x1b8/0x1160 arch/x86/kvm/vmx.c:9184
 vcpu_enter_guest+0xe05/0x4e30 arch/x86/kvm/x86.c:7296
 vcpu_run arch/x86/kvm/x86.c:7359 [inline]
 kvm_arch_vcpu_ioctl_run+0x257/0xec0 arch/x86/kvm/x86.c:7526
 kvm_vcpu_ioctl+0x45e/0xb60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2662
 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+0x46/0xbb
RIP: 0033:0x44ac69
RSP: 002b:00007fa48d42fce8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000006dfc48 RCX: 000000000044ac69
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00000000006dfc40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dfc4c
R13: 00007ffe1f08e83f R14: 00007fa48d4309c0 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..