linux-kernel - [syzbot] [kvm?] WARNING in kvm_tdp_mmu_invalidate_all

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Message-ID: <000000000000a0bc2b05f9dd7fab@google.com>
Date:   Fri, 21 Apr 2023 12:16:47 -0700
From:   syzbot <syzbot+094a74444165dbcd3a54@...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: [syzbot] [kvm?] WARNING in kvm_tdp_mmu_invalidate_all_roots

Hello,

syzbot found the following issue on:

HEAD commit:    d3e1ee0e67e7 Add linux-next specific files for 20230421
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=16ac3de0280000
kernel config:  https://syzkaller.appspot.com/x/.config?x=53c789efbcc06cf6
dashboard link: https://syzkaller.appspot.com/bug?extid=094a74444165dbcd3a54
compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/c558a9e1fe6a/disk-d3e1ee0e.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2ec100a34c4c/vmlinux-d3e1ee0e.xz
kernel image: https://storage.googleapis.com/syzbot-assets/1afcd9936dc1/bzImage-d3e1ee0e.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+094a74444165dbcd3a54@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 12623 at arch/x86/kvm/mmu/tdp_mmu.c:943 kvm_tdp_mmu_invalidate_all_roots+0x2bd/0x370 arch/x86/kvm/mmu/tdp_mmu.c:943
Modules linked in:
CPU: 0 PID: 12623 Comm: syz-executor.3 Not tainted 6.3.0-rc7-next-20230421-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
RIP: 0010:kvm_tdp_mmu_invalidate_all_roots+0x2bd/0x370 arch/x86/kvm/mmu/tdp_mmu.c:943
Code: 00 e8 a7 67 64 00 49 8d 7c 24 18 31 f6 e8 eb 23 ec 08 31 ff 89 c3 89 c6 e8 b0 63 64 00 85 db 0f 85 00 fe ff ff e8 83 67 64 00 <0f> 0b e9 f4 fd ff ff 48 89 ef e8 94 46 b7 00 e9 88 fd ff ff e8 4a
RSP: 0018:ffffc90005f7fc80 EFLAGS: 00010212
RAX: 0000000000015eaf RBX: 0000000000000000 RCX: ffffc9000e5cd000
RDX: 0000000000040000 RSI: ffffffff811f7dcd RDI: 0000000000000005
RBP: ffffc900062ba788 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc900062b1000
R13: 0000000000000000 R14: 0000000000000006 R15: ffffc900062b19d8
FS:  00007f9c99c7c700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa626bad988 CR3: 000000001cd68000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 kvm_mmu_uninit_tdp_mmu+0x16/0x100 arch/x86/kvm/mmu/tdp_mmu.c:48
 kvm_mmu_uninit_vm+0x6a/0x70 arch/x86/kvm/mmu/mmu.c:6239
 kvm_arch_destroy_vm+0x369/0x490 arch/x86/kvm/x86.c:12465
 kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:1245 [inline]
 kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:5017 [inline]
 kvm_dev_ioctl+0x11be/0x1bb0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:5059
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl fs/ioctl.c:856 [inline]
 __x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f9c98e8c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9c99c7c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f9c98fac120 RCX: 00007f9c98e8c169
RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000005
RBP: 00007f9c98ee7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff0f7a772f R14: 00007f9c99c7c300 R15: 0000000000022000
 </TASK>


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