From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ot1-f79.google.com (mail-ot1-f79.google.com [209.85.210.79]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E9B913DA7E4 for ; Tue, 9 Jun 2026 08:35:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.79 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780994136; cv=none; b=iHONbV5+9xeJ4wd3rg429FxkLIp0MfVzg6cIXtN8IDfU54yzMZVO8XGlQ9mwA3ZbtNAPpgv/bsu/7CW2uwwARUMV7UtVB6bGjoBZy6q8zixB94QnBigORfuqRL1+u0EjCq0S6Re1Fqw6me8mnWeTTQhm8lRR4mYUc40AI7hlkpY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780994136; c=relaxed/simple; bh=+P9np9Vka2QTiz07ylMGTts8gjD5wS+NjaH1YvfbKcs=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=flJ/0sfQw/9Hb9DzZ31BaoFo18giIKaQNscn0xl9D7Jrikf85046H/D/VgiG23tcPHe5QzOOb1RIaU9uNMSQd7GNd2qPfiXSMa5DG7rTs9Ch4+FkyXUGxHFI7gVNdqv8IiiH6HSz7Evlkjhv+aBLMf+9RGz42I6AqdTmXxsSflE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.210.79 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-ot1-f79.google.com with SMTP id 46e09a7af769-7e74781faaaso2315022a34.2 for ; Tue, 09 Jun 2026 01:35:34 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780994134; x=1781598934; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=9VdIF8pTA7WFCZP9AlK4xwxv3lQF76PPRLqZ1KRVk1g=; b=TrnkuJfm+6HtIAddWhpe5MXPcX0CXtnCnjg/rbpsVCpqdd4CEQrextQC9mQWSKJBik R5d7opp/VjpgBDSiAfnmrWUe33Y5nneSuMgHj7ylPvGm36BOW0RzRT2fa5Trn1lKVvPk rvzQ2hkpM4KiudlVen4x3YZ9IfoE0IF1F1u2H9ZuUdiFvK0QXn6W2ZrXMM0wQIAWKPq3 gJsxaSIUwx3T8S5QLUFkgRsJfILLSzCs6YZimoSgPaQmmus8gGrmgg9UwRmocx3+nRol bHgeSqAJ04X2xnC6rI3q4uikWDn5Ox/Vbtok73kTrAdB/UM0h5OEQIn/n5yy+8ArRly2 69lA== X-Gm-Message-State: AOJu0YwgSITS9MAR1lQzqIpZ56cVwS7/qo033cIHCPmH2pEwc9NTOKt5 ofCkYnRGpb/og/m5LDvkmOS1DojAHx+qGU0bBwIeHPY+M6ihvK4XL+tudWbDzoN3AKSjIchb7ae IG2/AZw7uYF35KGpkn60LSS62HD1RYtbOA+vVd29Oir7hEHTqtRgxCJBzsxpkKQ== Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:1999:b0:69e:3c64:7f6f with SMTP id 006d021491bc7-69e68c58c2bmr9469034eaf.48.1780994133929; Tue, 09 Jun 2026 01:35:33 -0700 (PDT) Date: Tue, 09 Jun 2026 01:35:33 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a27d055.39669fcc.33b062.008d.GAE@google.com> Subject: [syzbot] [usb?] [input?] KMSAN: uninit-value in steam_register From: syzbot To: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 8e65320d91cd Merge tag 'drm-fixes-2026-06-06' of https://g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13cb9e7a580000 kernel config: https://syzkaller.appspot.com/x/.config?x=a0ca3b8cb3875012 dashboard link: https://syzkaller.appspot.com/bug?extid=75f3f9bff8c510602d36 compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/793bd3b9425c/disk-8e65320d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/4bfe5cfc266c/vmlinux-8e65320d.xz kernel image: https://storage.googleapis.com/syzbot-assets/99c7cd705a06/bzImage-8e65320d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+75f3f9bff8c510602d36@syzkaller.appspotmail.com hid-steam 0003:28DE:1102.0007: unknown main item tag 0x0 hid-steam 0003:28DE:1102.0007: unknown main item tag 0x0 hid-steam 0003:28DE:1102.0007: : USB HID v7f.fd Device [HID 28de:1102] on usb-dummy_hcd.1-1/input0 ===================================================== BUG: KMSAN: uninit-value in steam_get_serial drivers/hid/hid-steam.c:457 [inline] BUG: KMSAN: uninit-value in steam_register+0xd83/0x10e0 drivers/hid/hid-steam.c:965 steam_get_serial drivers/hid/hid-steam.c:457 [inline] steam_register+0xd83/0x10e0 drivers/hid/hid-steam.c:965 steam_probe+0x6f1/0x19b0 drivers/hid/hid-steam.c:1273 __hid_device_probe drivers/hid/hid-core.c:2822 [inline] hid_device_probe+0x60d/0xb90 drivers/hid/hid-core.c:2859 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x4d5/0xe40 drivers/base/dd.c:709 __driver_probe_device+0x2fb/0x410 drivers/base/dd.c:871 driver_probe_device+0x70/0x8f0 drivers/base/dd.c:901 __device_attach_driver+0x4ee/0x950 drivers/base/dd.c:1029 bus_for_each_drv+0x3e3/0x680 drivers/base/bus.c:500 __device_attach+0x3c5/0x5f0 drivers/base/dd.c:1101 device_initial_probe+0x126/0x170 drivers/base/dd.c:1156 bus_probe_device+0x287/0x530 drivers/base/bus.c:613 device_add+0x12e3/0x1c90 drivers/base/core.c:3706 hid_add_device+0x440/0x5d0 drivers/hid/hid-core.c:3003 usbhid_probe+0x1a25/0x20e0 drivers/hid/usbhid/hid-core.c:1449 usb_probe_interface+0xd51/0x1440 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x4d5/0xe40 drivers/base/dd.c:709 __driver_probe_device+0x2fb/0x410 drivers/base/dd.c:871 driver_probe_device+0x70/0x8f0 drivers/base/dd.c:901 __device_attach_driver+0x4ee/0x950 drivers/base/dd.c:1029 bus_for_each_drv+0x3e3/0x680 drivers/base/bus.c:500 __device_attach+0x3c5/0x5f0 drivers/base/dd.c:1101 device_initial_probe+0x126/0x170 drivers/base/dd.c:1156 bus_probe_device+0x287/0x530 drivers/base/bus.c:613 device_add+0x12e3/0x1c90 drivers/base/core.c:3706 usb_set_configuration+0x3484/0x3b60 drivers/usb/core/message.c:2268 usb_generic_driver_probe+0xfc/0x290 drivers/usb/core/generic.c:250 usb_probe_device+0x38d/0x690 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x4d5/0xe40 drivers/base/dd.c:709 __driver_probe_device+0x2fb/0x410 drivers/base/dd.c:871 driver_probe_device+0x70/0x8f0 drivers/base/dd.c:901 __device_attach_driver+0x4ee/0x950 drivers/base/dd.c:1029 bus_for_each_drv+0x3e3/0x680 drivers/base/bus.c:500 __device_attach+0x3c5/0x5f0 drivers/base/dd.c:1101 device_initial_probe+0x126/0x170 drivers/base/dd.c:1156 bus_probe_device+0x287/0x530 drivers/base/bus.c:613 device_add+0x12e3/0x1c90 drivers/base/core.c:3706 usb_new_device+0x106a/0x2120 drivers/usb/core/hub.c:2695 hub_port_connect drivers/usb/core/hub.c:5567 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x5404/0x77c0 drivers/usb/core/hub.c:5953 process_one_work kernel/workqueue.c:3314 [inline] process_scheduled_works+0xb65/0x1e40 kernel/workqueue.c:3397 worker_thread+0xee4/0x1590 kernel/workqueue.c:3478 kthread+0x53a/0x5f0 kernel/kthread.c:436 ret_from_fork+0x20f/0x8d0 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Local variable reply.i created at: steam_get_serial drivers/hid/hid-steam.c:448 [inline] steam_register+0x180/0x10e0 drivers/hid/hid-steam.c:965 steam_probe+0x6f1/0x19b0 drivers/hid/hid-steam.c:1273 CPU: 0 UID: 0 PID: 7403 Comm: kworker/0:6 Tainted: G L syzkaller #0 PREEMPT(lazy) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Workqueue: usb_hub_wq hub_event ===================================================== --- 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 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