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AJvYcCX20Ta17EEixmAF6Ie83RDdgW5C9CSvhwmkoQr4BTeQ2RFj6uwnMu5g1ebBHLEwrQgMwu8=@vger.kernel.org X-Gm-Message-State: AOJu0YxyfwL0wDNbrC1AhF/w5EyZ7yZ8H07g/m2gE1wOYO/+u1KUCibr fGz1NejlTWbRh19IS8jmz8juZARWbht6SRjryWWZ5LzVO3y4jYybPNFVq7AFibsx351sD+XXxhJ WhvmISZPw4iarT8xcrPq/l6lc9Hh2cY6+SxIe417DErVXie/+rYUVt5uPbIE= X-Google-Smtp-Source: AGHT+IG+FIgamX9chgH7c3HkxxSIsPbdchq0UJicuLBINKbqg/JgqmTbA/vPn0sBnkCZ7P1fuJC1YLCB3okPFeRLJxMfIT9PthTf Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:348e:b0:433:7673:1d with SMTP id e9e14a558f8ab-435b8e9acb8mr109337345ab.31.1763995232398; Mon, 24 Nov 2025 06:40:32 -0800 (PST) Date: Mon, 24 Nov 2025 06:40:32 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <69246e60.a70a0220.d98e3.008e.GAE@google.com> Subject: [syzbot] [kvm-x86?] WARNING in x86_emulate_insn (2) From: syzbot To: bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, 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, x86@kernel.org Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: d724c6f85e80 Add linux-next specific files for 20251121 git tree: linux-next console output: https://syzkaller.appspot.com/x/log.txt?x=11513612580000 kernel config: https://syzkaller.appspot.com/x/.config?x=763fb984aa266726 dashboard link: https://syzkaller.appspot.com/bug?extid=fa52a184ebce1b30ad49 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=165638b4580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15c00e58580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/b2f349c65e3c/disk-d724c6f8.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/aba40ae987ce/vmlinux-d724c6f8.xz kernel image: https://storage.googleapis.com/syzbot-assets/0b98fbfe576f/bzImage-d724c6f8.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+fa52a184ebce1b30ad49@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: arch/x86/kvm/emulate.c:5560 at x86_emulate_insn+0x2909/0x41a0 arch/x86/kvm/emulate.c:5560, CPU#1: syz.1.2382/16268 Modules linked in: CPU: 1 UID: 0 PID: 16268 Comm: syz.1.2382 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:x86_emulate_insn+0x2909/0x41a0 arch/x86/kvm/emulate.c:5560 Code: 36 31 ff 44 89 f6 e8 66 99 77 00 45 85 f6 0f 84 05 02 00 00 e8 18 95 77 00 41 bf 01 00 00 00 e9 ef e0 ff ff e8 08 95 77 00 90 <0f> 0b 90 48 8b 44 24 50 42 80 3c 20 00 48 8b 5c 24 48 74 08 48 89 RSP: 0018:ffffc9000d6ff6c0 EFLAGS: 00010293 RAX: ffffffff814a8468 RBX: 000304000010220a RCX: ffff88807d930000 RDX: 0000000000000000 RSI: 00000000000000ff RDI: 000000000000001f RBP: ffffc9000d6ff7d0 R08: ffff88807d930000 R09: 0000000000000002 R10: 0000000000000006 R11: 0000000000000000 R12: dffffc0000000000 R13: 1ffff92001adfee8 R14: 00000000000000ff R15: ffff888060266780 FS: 00007f90f1e156c0(0000) GS:ffff888125b6f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000000745ec000 CR4: 00000000003526f0 Call Trace: x86_emulate_instruction+0xea7/0x20b0 arch/x86/kvm/x86.c:9521 kvm_arch_vcpu_ioctl_run+0x1404/0x1cd0 arch/x86/kvm/x86.c:11960 kvm_vcpu_ioctl+0x99a/0xed0 virt/kvm/kvm_main.c:4477 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f90f0f8f749 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f90f1e15038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f90f11e6090 RCX: 00007f90f0f8f749 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 RBP: 00007f90f1013f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f90f11e6128 R14: 00007f90f11e6090 R15: 00007ffc7b4d1758 --- 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. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title 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. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup