Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
MIME-Version: 1.0
Date:   Sat, 23 Apr 2022 03:56:21 -0700
Message-ID: <00000000000082452505dd503126@google.com>
Subject: [syzbot] WARNING in kvm_mmu_uninit_tdp_mmu (2)
From:   syzbot <syzbot+a8ad3ee1525a0c4b40ec@syzkaller.appspotmail.com>
To:     bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com,
        jmattson@google.com, joro@8bytes.org, kvm@vger.kernel.org,
        linux-kernel@vger.kernel.org, mingo@redhat.com,
        pbonzini@redhat.com, seanjc@google.com,
        syzkaller-bugs@googlegroups.com, tglx@linutronix.de,
        vkuznets@redhat.com, wanpengli@tencent.com, x86@kernel.org
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Hello,

syzbot found the following issue on:

HEAD commit:    59f0c2447e25 Merge tag 'net-5.18-rc4' of git://git.kernel...
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15a61430f00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=6bc13fa21dd76a9b
dashboard link: https://syzkaller.appspot.com/bug?extid=a8ad3ee1525a0c4b40ec
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=134363d0f00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11ed3e34f00000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a8ad3ee1525a0c4b40ec@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 3597 at arch/x86/kvm/mmu/tdp_mmu.c:57 kvm_mmu_uninit_tdp_mmu+0xf8/0x130 arch/x86/kvm/mmu/tdp_mmu.c:57
Modules linked in:
CPU: 1 PID: 3597 Comm: syz-executor294 Not tainted 5.18.0-rc3-syzkaller-00060-g59f0c2447e25 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
RIP: 0010:kvm_mmu_uninit_tdp_mmu+0xf8/0x130 arch/x86/kvm/mmu/tdp_mmu.c:57
Code: 83 d8 a0 00 00 48 39 c5 75 24 e8 e3 4d 5a 00 e8 9e e0 45 00 5b 5d e9 d7 4d 5a 00 e8 b2 42 a5 00 e9 3d ff ff ff e8 c8 4d 5a 00 <0f> 0b eb ad e8 bf 4d 5a 00 0f 0b eb d3 e8 c6 42 a5 00 e9 64 ff ff
RSP: 0018:ffffc90002e37c08 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffffc90002cda000 RCX: 0000000000000000
RDX: ffff888023f1e180 RSI: ffffffff811e1688 RDI: 0000000000000001
RBP: ffffc90002ce40e8 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff817ead48 R11: 0000000000000000 R12: ffffc90002cda000
R13: ffffc90002e37c50 R14: 0000000000000003 R15: ffffc90002cdb240
FS:  0000000000000000(0000) GS:ffff88802cb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560ac4d0cd68 CR3: 000000000ba8e000 CR4: 0000000000152ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kvm_arch_destroy_vm+0x350/0x470 arch/x86/kvm/x86.c:11860
 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:1230 [inline]
 kvm_put_kvm+0x4fa/0xb70 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1264
 kvm_vm_release+0x3f/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1287
 __fput+0x277/0x9d0 fs/file_table.c:317
 task_work_run+0xdd/0x1a0 kernel/task_work.c:164
 exit_task_work include/linux/task_work.h:37 [inline]
 do_exit+0xaff/0x2a00 kernel/exit.c:795
 do_group_exit+0xd2/0x2f0 kernel/exit.c:925
 __do_sys_exit_group kernel/exit.c:936 [inline]
 __se_sys_exit_group kernel/exit.c:934 [inline]
 __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:934
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f0327505409
Code: Unable to access opcode bytes at RIP 0x7f03275053df.
RSP: 002b:00007ffc4a0be998 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f0327578350 RCX: 00007f0327505409
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffffffffffc0 R09: 68742f636f72702f
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007f0327578350
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
 </TASK>


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches