From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=209.85.161.70 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793607700; b=dUkWm76b99Fdh5eGnUrgxiopqWPwWlGQnNK7iSJXmCmHQa7Bs5gWkRL6zx9KP5Ym3Hzm Q/hUNMimixJxRW7rlN0ZXLWnHp4F6rqsU/dcAoyI6nz9VEQvR2SdNpQTvV5iSa5f1hId5 GjGkDZ/MNzDcMdZQHIENAMY0fyQtB3KA32Q0bwQeMfNMDHuSBukFBnMLyrT9tQQVOg+MW FIGQAPfWZfGLIedb+h5XFLelhZp4wKo9lY68CoX76wnGRvQp9RTO0FuTW+tzZdGwTCXLZ 3WKsuTsLd3qqQGqlsoAnkbIyG3miO3mi63jjHoPMQy6wrAn7BQAKXOL6q/frwId1b+g== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793607700; h=DMARC-Filter:Received:X-Google-DKIM-Signature:X-Gm-Message-State: MIME-Version:X-Received:Date:In-Reply-To:X-Google-Appengine-App-Id: X-Google-Appengine-App-Id-Alias:Message-ID:Subject:From:To: Content-Type; bh=5FOz0TiH9w3NcIetfR+dP6aB6d9nyP+PHblRoSTH/oo=; b=O3Q960lqe7oeSWgJjhkYHu1g+GS0jlL+LUWtn+RAosyAWP0P480UYCjflvn+mV81OcRC EVRLPG1nhdoBudvNvyDRZ75BJ7hPHMkwgFJ2jebfsXPTW+l5jAuIH8avgl7BGUncnglgj hLIMmyKs4GCZ6f6tNvrOyUu8b47rtbSvR6VBwPVaf5FGT30GUYinsrOONwaVBvv1jeDfP H/BUD5nd9yNpI9CnfsZsLTv8VHns1T/RFLsEvqPEBBE5OmcICzC7hXiz6wioivK0CK2UI S9LxxTBm9Yr2fRpHKNx+9KwpU8tJn0fzjP/heXNcuZgzE3o1pjtRMrDwe1+jV+1tuiw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=fail header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.remote-ip=209.85.161.70 Received: from mail-oo1-f70.google.com (mail-oo1-f70.google.com [209.85.161.70]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D181D606A334 for ; Mon, 2 Nov 2026 08:21:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org D181D606A334 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-oo1-f70.google.com with SMTP id 006d021491bc7-70b8894d6c1so3606553eaf.0 for ; Mon, 02 Nov 2026 00:21:39 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1793607699; x=1794212499; h=content-type:to:from:subject:message-id:in-reply-to:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=5FOz0TiH9w3NcIetfR+dP6aB6d9nyP+PHblRoSTH/oo=; b=Q+Yk2LDvjNd+ZXNBD/K2W9vjDlBkF0tvhMWKhcxb0yU+gSkznfXHQrZ12KmdgBG2Qu 8vdRJ3jo5e1z+oF0jzaWiFlmCqZNFjIC3xMdmmZk6rtvhERTFPAhndq+jx5L275GQYeP R/DIOiMQYaZF07HeavLSYe7jvwWwm+q+kWNn+eTF5518i5u9nP869ASV/VoGNjXw5NsH YM1ZXiYX0zzqQvRB0frMqoZrQ8vAT2ftu8nI3iUT1NNvZ0BM67i0Dbp5enLCFxoRFTzN Bc4CVun4uppDKMYG9gN1MTmfB3GiF6sUfXI17LGT4zi8aItmL5DJ91W6uynZPiDlRyjB DI2A== X-Gm-Message-State: AFq9FYL9DoPDDMjNHeNd6jAF9wIrqPJDynGBNYbsY+F/989pPw0JNPgb Km7ZLl/tUUxwRnw/ymA6e+L3LiqB7bIVfTMGB9+l78RlB4hw1KFr6UNhnqwM3e3Ny7CcChkfoba bAZDYR2e1Asd8Eooo3dXBqsX3X6PUXNH21KWBzT+lj/qIQzV3GssXQIRAPNM= X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 X-Received: by 2002:a05:6820:4d02:b0:703:6903:75f5 with SMTP id 006d021491bc7-714ddf5e83emr6540810eaf.39.1793607698827; Mon, 02 Nov 2026 00:21:38 -0800 (PST) Date: Mon, 02 Nov 2026 00:21:38 -0800 In-Reply-To: <6ad08fa3.a150a118.27e199.006c.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6ae84812.6552420f.2a0efc.0676.GAE@google.com> Subject: Forwarded: [PATCH] HID: saitek: prevent NULL pointer dereference in saitek_event() From: syzbot To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" For archival purposes, forwarding an incoming command email to linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com. *** Subject: [PATCH] HID: saitek: prevent NULL pointer dereference in saitek_event() Author: dlzhangak@isoftstone.com #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master diff --git a/drivers/hid/hid-saitek.c b/drivers/hid/hid-saitek.c index 6fe7c087c594..7e1160a24230 100644 --- a/drivers/hid/hid-saitek.c +++ b/drivers/hid/hid-saitek.c @@ -151,7 +151,12 @@ static int saitek_event(struct hid_device *hdev, struct hid_field *field, struct hid_usage *usage, __s32 value) { struct saitek_sc *ssc = hid_get_drvdata(hdev); - struct input_dev *input = field->hidinput->input; + struct input_dev *input; + + if (!(hdev->claimed & HID_CLAIMED_INPUT) || !field->hidinput) + return 0; + + input = field->hidinput->input; if (usage->type == EV_KEY && value && (((ssc->quirks & SAITEK_RELEASE_MODE_RAT7) &&