WARNING in vmx_handle_exit

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: cb83ddcd Linux 4.14.226
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=11746ad6d00000
kernel config: https://syzkaller.appspot.com/x/.config?x=124f4e6b89b71fac
dashboard link: https://syzkaller.appspot.com/bug?extid=28c698fdfef19e267236

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+28c698...@syzkaller.appspotmail.com

Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x281 lib/dump_stack.c:58
fail_dump lib/fault-inject.c:51 [inline]
should_fail.cold+0x10a/0x149 lib/fault-inject.c:149
should_fail_alloc_page mm/page_alloc.c:2898 [inline]
prepare_alloc_pages mm/page_alloc.c:4131 [inline]
__alloc_pages_nodemask+0x22c/0x2720 mm/page_alloc.c:4179
------------[ cut here ]------------
WARNING: CPU: 1 PID: 9251 at arch/x86/kvm/vmx.c:6952 handle_ept_misconfig+0x11f/0x430 arch/x86/kvm/vmx.c:6952
Kernel panic - not syncing: panic_on_warn set ...

alloc_pages_current+0x155/0x260 mm/mempolicy.c:2113
alloc_pages include/linux/gfp.h:520 [inline]
__get_free_pages+0xb/0x40 mm/page_alloc.c:4233
mmu_topup_memory_cache_page arch/x86/kvm/mmu.c:1005 [inline]
mmu_topup_memory_caches+0x187/0x300 arch/x86/kvm/mmu.c:1027
kvm_mmu_load+0x1e/0xd00 arch/x86/kvm/mmu.c:4811
kvm_mmu_reload arch/x86/kvm/mmu.h:86 [inline]
vcpu_enter_guest arch/x86/kvm/x86.c:7167 [inline]
vcpu_run arch/x86/kvm/x86.c:7364 [inline]
kvm_arch_vcpu_ioctl_run+0x3639/0x5ae0 arch/x86/kvm/x86.c:7531
kvm_vcpu_ioctl+0x3de/0xc50 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+0x75a/0xff0 fs/ioctl.c:684
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x466459
RSP: 002b:00007f7c53cfb188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f7c53cfb1d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 00007ffe343bbdcf R14: 00007f7c53cfb300 R15: 0000000000022000
CPU: 1 PID: 9251 Comm: syz-executor.3 Not tainted 4.14.226-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+0x1b2/0x281 lib/dump_stack.c:58
panic+0x1f9/0x42d kernel/panic.c:183
__warn.cold+0x20/0x44 kernel/panic.c:547
report_bug+0x208/0x250 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:177 [inline]
fixup_bug arch/x86/kernel/traps.c:172 [inline]
do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:handle_ept_misconfig+0x11f/0x430 arch/x86/kvm/vmx.c:6952
RSP: 0018:ffff88804e5cfa68 EFLAGS: 00010212
RAX: 0000000000040000 RBX: ffffffff8114ddb0 RCX: ffffc900076ed000
RDX: 000000000003cd1b RSI: ffffffff8114decf RDI: ffff8880430a0e40
RBP: ffff8880430a0e40 R08: 0000000000000007 R09: ffff88804e5cf9a8
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffff2
R13: 0000000000000031 R14: 0000000000000000 R15: ffff8880430a0e40
vmx_handle_exit+0x1f8/0x14b0 arch/x86/kvm/vmx.c:9184
vcpu_enter_guest arch/x86/kvm/x86.c:7301 [inline]
vcpu_run arch/x86/kvm/x86.c:7364 [inline]
kvm_arch_vcpu_ioctl_run+0x1da6/0x5ae0 arch/x86/kvm/x86.c:7531
kvm_vcpu_ioctl+0x3de/0xc50 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+0x75a/0xff0 fs/ioctl.c:684
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x466459
RSP: 002b:00007fce858f7188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000007
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffee778ab9f R14: 00007fce858f7300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.