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X-Received: by 2002:a02:81c5:: with SMTP id r5mr2904337jag.143.1567672087277; Thu, 05 Sep 2019 01:28:07 -0700 (PDT) Date: Thu, 05 Sep 2019 01:28:07 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000e3072b0591ca1937@google.com> Subject: general protection fault in __apic_accept_irq From: syzbot To: bp@alien8.de, devel@linuxdriverproject.org, haiyangz@microsoft.com, hpa@zytor.com, jmattson@google.com, joro@8bytes.org, kvm@vger.kernel.org, kys@microsoft.com, linux-kernel@vger.kernel.org, mikelley@microsoft.com, mingo@redhat.com, pbonzini@redhat.com, rkrcmar@redhat.com, sashal@kernel.org, sean.j.christopherson@intel.com, sthemmin@microsoft.com, syzkaller-bugs@googlegroups.com, tglx@linutronix.de, vkuznets@redhat.com, wanpengli@tencent.com, x86@kernel.org Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 3b47fd5c Merge tag 'nfs-for-5.3-4' of git://git.linux-nfs... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=124af12a600000 kernel config: https://syzkaller.appspot.com/x/.config?x=144488c6c6c6d2b6 dashboard link: https://syzkaller.appspot.com/bug?extid=dff25ee91f0c7d5c1695 compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10954676600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1752fe0a600000 The bug was bisected to: commit 0aa67255f54df192d29aec7ac6abb1249d45bda7 Author: Vitaly Kuznetsov Date: Mon Nov 26 15:47:29 2018 +0000 x86/hyper-v: move synic/stimer control structures definitions to hyperv-tlfs.h bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=156128c1600000 console output: https://syzkaller.appspot.com/x/log.txt?x=136128c1600000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+dff25ee91f0c7d5c1695@syzkaller.appspotmail.com Fixes: 0aa67255f54d ("x86/hyper-v: move synic/stimer control structures definitions to hyperv-tlfs.h") kvm [9347]: vcpu0, guest rIP: 0xcc Hyper-V uhandled wrmsr: 0x40000004 data 0x94 kvm [9347]: vcpu0, guest rIP: 0xcc Hyper-V uhandled wrmsr: 0x40000004 data 0x48c kvm [9347]: vcpu0, guest rIP: 0xcc Hyper-V uhandled wrmsr: 0x40000004 data 0x4ac kvm [9347]: vcpu0, guest rIP: 0xcc Hyper-V uhandled wrmsr: 0x40000005 data 0x1520 kvm [9347]: vcpu0, guest rIP: 0xcc Hyper-V uhandled wrmsr: 0x40000006 data 0x15d4 kvm [9347]: vcpu0, guest rIP: 0xcc Hyper-V uhandled wrmsr: 0x40000007 data 0x15c4 kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 9347 Comm: syz-executor665 Not tainted 5.3.0-rc7+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__apic_accept_irq+0x46/0x740 arch/x86/kvm/lapic.c:1029 Code: 89 55 cc 41 89 f4 48 89 fb 49 bd 00 00 00 00 00 fc ff df e8 5c c9 5d 00 48 89 5d c0 4c 8d b3 98 00 00 00 4d 89 f7 49 c1 ef 03 <43> 80 3c 2f 00 74 08 4c 89 f7 e8 6b c4 96 00 49 8b 06 48 89 45 d0 RSP: 0018:ffff88808a30f9b0 EFLAGS: 00010202 RAX: ffffffff8115c384 RBX: 0000000000000000 RCX: ffff8880977f2140 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff88808a30fa10 R08: 0000000000000000 R09: 0000000000000000 R10: ffffed1011461f64 R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000098 R15: 0000000000000013 FS: 0000555555e35880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000008f96d000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kvm_apic_set_irq+0xb4/0x140 arch/x86/kvm/lapic.c:558 stimer_notify_direct arch/x86/kvm/hyperv.c:648 [inline] stimer_expiration arch/x86/kvm/hyperv.c:659 [inline] kvm_hv_process_stimers+0x594/0x1650 arch/x86/kvm/hyperv.c:686 vcpu_enter_guest+0x2b2a/0x54b0 arch/x86/kvm/x86.c:7896 vcpu_run+0x393/0xd40 arch/x86/kvm/x86.c:8152 kvm_arch_vcpu_ioctl_run+0x636/0x900 arch/x86/kvm/x86.c:8360 kvm_vcpu_ioctl+0x6cf/0xaf0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2765 do_vfs_ioctl+0x744/0x1730 fs/ioctl.c:46 ksys_ioctl fs/ioctl.c:713 [inline] __do_sys_ioctl fs/ioctl.c:720 [inline] __se_sys_ioctl fs/ioctl.c:718 [inline] __x64_sys_ioctl+0xe3/0x120 fs/ioctl.c:718 do_syscall_64+0xfe/0x140 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x442a19 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 1b 0c fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffca3d2a208 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000442a19 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 RBP: 00000000006cd018 R08: 00000000004002c8 R09: 00000000004002c8 R10: 00000000004002c8 R11: 0000000000000246 R12: 0000000000403ac0 R13: 0000000000403b50 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 8515c4c18eb55117 ]--- RIP: 0010:__apic_accept_irq+0x46/0x740 arch/x86/kvm/lapic.c:1029 Code: 89 55 cc 41 89 f4 48 89 fb 49 bd 00 00 00 00 00 fc ff df e8 5c c9 5d 00 48 89 5d c0 4c 8d b3 98 00 00 00 4d 89 f7 49 c1 ef 03 <43> 80 3c 2f 00 74 08 4c 89 f7 e8 6b c4 96 00 49 8b 06 48 89 45 d0 RSP: 0018:ffff88808a30f9b0 EFLAGS: 00010202 RAX: ffffffff8115c384 RBX: 0000000000000000 RCX: ffff8880977f2140 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff88808a30fa10 R08: 0000000000000000 R09: 0000000000000000 R10: ffffed1011461f64 R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000098 R15: 0000000000000013 FS: 0000555555e35880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000008f96d000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This bug 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 bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches