linux-kernel - Re: [syzbot] [kvm?] WARNING in vmx_handle

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Message-ID: <67689c62.050a0220.2f3838.000d.GAE@google.com>
Date: Sun, 22 Dec 2024 15:10:26 -0800
From: syzbot <syzbot+ac0bc3a70282b4d586cc@...kaller.appspotmail.com>
To: bp@...en8.de, dave.hansen@...ux.intel.com, hpa@...or.com, 
	kvm@...r.kernel.org, linux-kernel@...r.kernel.org, mingo@...hat.com, 
	pbonzini@...hat.com, seanjc@...gle.com, syzkaller-bugs@...glegroups.com, 
	tglx@...utronix.de, x86@...nel.org
Subject: Re: [syzbot] [kvm?] WARNING in vmx_handle_exit (2)

syzbot has found a reproducer for the following issue on:

HEAD commit:    bcde95ce32b6 Merge tag 'devicetree-fixes-for-6.13-1' of gi..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10635fe8580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=4f1586bab1323870
dashboard link: https://syzkaller.appspot.com/bug?extid=ac0bc3a70282b4d586cc
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=129c58c4580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=134e5f30580000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-bcde95ce.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/d1b2e8d294e3/vmlinux-bcde95ce.xz
kernel image: https://storage.googleapis.com/syzbot-assets/593ff4631acc/bzImage-bcde95ce.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ac0bc3a70282b4d586cc@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 6008 at arch/x86/kvm/vmx/vmx.c:6480 __vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6480 [inline]
WARNING: CPU: 1 PID: 6008 at arch/x86/kvm/vmx/vmx.c:6480 vmx_handle_exit+0x40f/0x1f70 arch/x86/kvm/vmx/vmx.c:6637
Modules linked in:
CPU: 1 UID: 0 PID: 6008 Comm: syz-executor324 Not tainted 6.13.0-rc3-syzkaller-00301-gbcde95ce32b6 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6480 [inline]
RIP: 0010:vmx_handle_exit+0x40f/0x1f70 arch/x86/kvm/vmx/vmx.c:6637
Code: 07 38 d0 7f 08 84 c0 0f 85 b1 11 00 00 44 0f b6 a5 49 99 00 00 31 ff 44 89 e6 e8 4c 86 68 00 45 84 e4 75 52 e8 62 84 68 00 90 <0f> 0b 90 48 8d bd 4a 99 00 00 c6 85 49 99 00 00 01 48 b8 00 00 00
RSP: 0018:ffffc90003d17a58 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888031ba0000 RCX: ffffffff81319144
RDX: ffff8880230ea440 RSI: ffffffff8131914e RDI: 0000000000000001
RBP: ffffc9000428c000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000080000021 R14: ffff888031ba02d8 R15: dffffc0000000000
FS:  00007f4811d6b6c0(0000) GS:ffff88806a700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4811d4ad58 CR3: 0000000030878000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 vcpu_enter_guest arch/x86/kvm/x86.c:11081 [inline]
 vcpu_run+0x3047/0x4f50 arch/x86/kvm/x86.c:11242
 kvm_arch_vcpu_ioctl_run+0x44a/0x1740 arch/x86/kvm/x86.c:11560
 kvm_vcpu_ioctl+0x6ce/0x1520 virt/kvm/kvm_main.c:4340
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl fs/ioctl.c:892 [inline]
 __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4811dbb649
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 1c 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4811d6b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f4811e3d348 RCX: 00007f4811dbb649
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000007
RBP: 00007f4811e3d340 R08: 00007f4811d6b6c0 R09: 0000000000000000
R10: 00007f4811d6b6c0 R11: 0000000000000246 R12: 00007f4811e3d34c
R13: 0000000000000000 R14: 00007ffea79b5e30 R15: 00007ffea79b5f18
 </TASK>


---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.