linux-kernel - general protection fault in vmx_vcpu

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Message-ID: <0000000000007ff56205ba985b60@google.com>
Date:   Fri, 05 Feb 2021 07:20:16 -0800
From:   syzbot <syzbot+42a71c84ef04577f1aef@...kaller.appspotmail.com>
To:     bp@...en8.de, hpa@...or.com, jmattson@...gle.com, joro@...tes.org,
        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,
        vkuznets@...hat.com, wanpengli@...cent.com, x86@...nel.org
Subject: general protection fault in vmx_vcpu_run (2)

Hello,

syzbot found the following issue on:

HEAD commit:    aa2b8820 Add linux-next specific files for 20210205
git tree:       linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=13d27b54d00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=15c41e44a64aa1a5
dashboard link: https://syzkaller.appspot.com/bug?extid=42a71c84ef04577f1aef

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+42a71c84ef04577f1aef@...kaller.appspotmail.com

general protection fault, probably for non-canonical address 0xdffffc0000001e26: 0000 [#1] PREEMPT SMP KASAN
KASAN: probably user-memory-access in range [0x000000000000f130-0x000000000000f137]
CPU: 0 PID: 18290 Comm: syz-executor.0 Not tainted 5.11.0-rc6-next-20210205-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:atomic_switch_perf_msrs arch/x86/kvm/vmx/vmx.c:6527 [inline]
RIP: 0010:vmx_vcpu_run+0x538/0x2740 arch/x86/kvm/vmx/vmx.c:6698
Code: 8a 55 00 39 eb 0f 8d fd 00 00 00 e8 42 85 55 00 48 8b 0c 24 48 63 c3 48 8d 04 40 48 8d 2c c1 48 8d 7d 08 48 89 f8 48 c1 e8 03 <42> 80 3c 38 00 0f 85 05 1d 00 00 48 8d 7d 10 4c 8b 6d 08 48 89 f8
RSP: 0018:ffffc9000238fb00 EFLAGS: 00010003
RAX: 0000000000001e26 RBX: 0000000000000000 RCX: 000000000000f12e
RDX: 0000000000040000 RSI: ffffffff811d679e RDI: 000000000000f136
RBP: 000000000000f12e R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff811d675e R11: 0000000000000000 R12: ffff88806d8ba4d0
R13: ffff88806d8ba520 R14: ffff88806d8b8000 R15: dffffc0000000000
FS:  00007f1a30eaf700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1a30ece6b8 CR3: 000000001c387000 CR4: 00000000001526f0
Call Trace:
 vcpu_enter_guest+0x103d/0x3f90 arch/x86/kvm/x86.c:9015
 vcpu_run arch/x86/kvm/x86.c:9155 [inline]
 kvm_arch_vcpu_ioctl_run+0x440/0x1980 arch/x86/kvm/x86.c:9382
 kvm_vcpu_ioctl+0x467/0xd90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3283
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl fs/ioctl.c:739 [inline]
 __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:739
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x465b09
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1a30eaf188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465b09
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000007
RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008
R13: 00007ffde3d7a22f R14: 00007f1a30eaf300 R15: 0000000000022000
Modules linked in:
---[ end trace 7085899e9678fd16 ]---
RIP: 0010:atomic_switch_perf_msrs arch/x86/kvm/vmx/vmx.c:6527 [inline]
RIP: 0010:vmx_vcpu_run+0x538/0x2740 arch/x86/kvm/vmx/vmx.c:6698
Code: 8a 55 00 39 eb 0f 8d fd 00 00 00 e8 42 85 55 00 48 8b 0c 24 48 63 c3 48 8d 04 40 48 8d 2c c1 48 8d 7d 08 48 89 f8 48 c1 e8 03 <42> 80 3c 38 00 0f 85 05 1d 00 00 48 8d 7d 10 4c 8b 6d 08 48 89 f8
RSP: 0018:ffffc9000238fb00 EFLAGS: 00010003
RAX: 0000000000001e26 RBX: 0000000000000000 RCX: 000000000000f12e
RDX: 0000000000040000 RSI: ffffffff811d679e RDI: 000000000000f136
RBP: 000000000000f12e R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff811d675e R11: 0000000000000000 R12: ffff88806d8ba4d0
R13: ffff88806d8ba520 R14: ffff88806d8b8000 R15: dffffc0000000000
FS:  00007f1a30eaf700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1a30ece6b8 CR3: 000000001c387000 CR4: 00000000001526f0


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