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Date:   Thu, 26 Oct 2017 09:35:20 -0700
From:   syzbot 
        <bot+c1d9517cab094dae65e446c0c5b4de6c40f4dc58@...kaller.appspotmail.com>
To:     hpa@...or.com, kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        mingo@...hat.com, pbonzini@...hat.com, rkrcmar@...hat.com,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de, x86@...nel.org
Subject: WARNING in handle_ept_misconfig

Hello,

syzkaller hit the following crash on  
9829d9f31f6c0e4984545e03032f14ccca6eeb68
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master
compiler: gcc (GCC) 7.1.1 20170620
.config is attached
Raw console output is attached.

syzkaller reproducer is attached. See https://goo.gl/kgGztJ
for information about syzkaller reproducers


WARNING: CPU: 0 PID: 4003 at arch/x86/kvm/vmx.c:6526  
handle_ept_misconfig+0x140/0x520 arch/x86/kvm/vmx.c:6526
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 4003 Comm: syz-executor1 Not tainted 4.13.0-next-20170904+ #14
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Call Trace:
  __dump_stack lib/dump_stack.c:16 [inline]
  dump_stack+0x194/0x257 lib/dump_stack.c:52
  panic+0x1e4/0x417 kernel/panic.c:181
  __warn+0x1c4/0x1d9 kernel/panic.c:542
  report_bug+0x211/0x2d0 lib/bug.c:183
  fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:178
  do_trap_no_signal arch/x86/kernel/traps.c:212 [inline]
  do_trap+0x260/0x390 arch/x86/kernel/traps.c:261
  do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:298
  do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:311
  invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905
RIP: 0010:handle_ept_misconfig+0x140/0x520 arch/x86/kvm/vmx.c:6526
RSP: 0018:ffff88006d2df470 EFLAGS: 00010297
RAX: ffff88006d1d0540 RBX: 1ffff1000da5be90 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffed000da5be78
RBP: ffff88006d2df548 R08: 0000000000000007 R09: ffff88006d2df2f0
R10: ffff88006d1d0540 R11: 0000000000000002 R12: ffff88003aec06c0
R13: 00000000fffffff2 R14: ffff88006d2df520 R15: dffffc0000000000
  vmx_handle_exit+0x24b/0x1a60 arch/x86/kvm/vmx.c:8823
  vcpu_enter_guest arch/x86/kvm/x86.c:7038 [inline]
  vcpu_run arch/x86/kvm/x86.c:7100 [inline]
  kvm_arch_vcpu_ioctl_run+0x1d36/0x5a30 arch/x86/kvm/x86.c:7261
  kvm_vcpu_ioctl+0x64c/0x1010 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2550
  vfs_ioctl fs/ioctl.c:45 [inline]
  do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:685
  SYSC_ioctl fs/ioctl.c:700 [inline]
  SyS_ioctl+0x8f/0xc0 fs/ioctl.c:691
  entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x447299
RSP: 002b:00007fddb74bdc08 EFLAGS: 00000296 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000000000b RCX: 0000000000447299
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 000000000000000b
RBP: 0000000000000082 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 000000000000000c
R13: 0000000000005790 R14: 00000000006e8850 R15: 000000000000000b
Dumping ftrace buffer:
    (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..


---
This bug is generated by a dumb bot. It may contain errors.
See https://goo.gl/tpsmEJ for details.
Direct all questions to syzkaller@...glegroups.com.

syzbot will keep track of this bug report.
Once a fix for this bug is committed, please reply to this email with:
#syz fix: exact-commit-title
To mark this as a duplicate of another syzbot report, please reply with:
#syz dup: exact-subject-of-another-report
If it's a one-off invalid bug report, please reply with:
#syz invalid
Note: if the crash happens again, it will cause creation of a new bug  
report.

View attachment "config.txt" of type "text/plain" (123749 bytes)

Download attachment "raw.log" of type "application/octet-stream" (4884 bytes)

View attachment "repro.txt" of type "text/plain" (3295 bytes)

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