From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f51.google.com (mail-pj1-f51.google.com [209.85.216.51]) (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 696C541BA75 for ; Thu, 27 Aug 2026 09:23:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.51 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787822599; cv=none; b=st2BAqsTQV4rtmHu3bHVHnR2RaHfoTHTdrSmLjjvywnwOeyfS+vzM+GyWqqtLP8Tfbq5T90mPhuln1h1sYE4B2RnbT1+tygtYKOZasApwERcfXRBFXR1ii274gCFOZ71+rbKbD0dmGXXcMdGfjG5DvA5PTcsd8mEmckIlD86zJ4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787822599; c=relaxed/simple; bh=pilzqgLX23vrgU8x1OrQeeuvR+C3KBcsvDYv0GU7JNk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ph38n2BeiUmjeJilQoii2DrWobdzW7qqLvHhjw1mTGlV8DqHT5NYc8WpQZ0IVlL2PV6EpxpZ06JpNNHlMSy6tjIMsbIvVtDAh7g0gs/xqo71wRoE/+bpXT7Z5N8zL+AkE5YmZxY1C/at+GC4emVBKmuKP+2z49toGbuqYFRjzOc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=d+VeMma7; arc=none smtp.client-ip=209.85.216.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="d+VeMma7" Received: by mail-pj1-f51.google.com with SMTP id 98e67ed59e1d1-38e07ebd263so1596471a91.1 for ; Thu, 27 Aug 2026 02:23:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1787822596; x=1788427396; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to:content-type; bh=uaA1NG09mAC26Uk+RbGvv99dkflUecBsEoDtXvZSg1g=; b=d+VeMma7DOFPbV6c8HI/j0lD2Gqq6H1sYrechKiHBrPkRzMQ+HWEP7v43q39LCnFcV 4wRcbQIOCX+/f3C/ptkpSKCXcb4GJoYEJIqVi+Yx1YM6FtyoTv+BFYtonlk0PVXCGPSV aPWm8zZn42fKiYV8QNv+d7yOdCD6Pj4Z1jOwfwyi7y9ddr6fruJGVvg0xBW/o1iWXHL/ ISvavpbGdK2QiHtJBTV5eklEmsGa78nQEY1uaMBkCYoMgjpVgo1WTzku8Nbn1AkJZqzR 7WHL2CqaOE3bIQ4tK6VBJrYfk9DK5sJu0b+Rp37hcHCkrYwNr7pfjT79hv6qTNsPkbZp +j1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1787822596; x=1788427396; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to:content-type; bh=uaA1NG09mAC26Uk+RbGvv99dkflUecBsEoDtXvZSg1g=; b=sDQVTiqCAIq4L7xIzbVBSY9X0J++wW1j389wPe4DgGpRzA6ITupmKD9OfqAyGZMOnz Lc8jleXcqnD4Wmnk2pYpKEQpKxyx3VQZYZLgKjVFz/3qPLgSPjZ4GY//9A7zYRk//Fi/ ksyk98xl5GVwTDFBcEPJNOkd2Td0P2EiBxwlaCQxYYS3TA4Ch+ltekLs45pD0fv/EV+Z 9mH9wHKtyYwJKr/1zbTidY/j92fySFzHZeqdJ4crx1gZ5TPJ3tV3Ghd+8VCS1pck07b4 dQC5/rHeVuurQNazDFseQUQqYvfgAqk+gYS4o3JMHLvgbdSbi0/yBJX8MnyTB7R8jpHF Lx1g== X-Forwarded-Encrypted: i=1; AHgh+RovULyu3/YYgfidTPL/b3hFeN3WT8xMFCkOGwbRFPGqIYVyPkp2Z8UCQuBMvK5Pda+FNUURR5W9E3/c61o=@vger.kernel.org X-Gm-Message-State: AFuF++nd5lGPo02Pkn5inBoQay5/0w1Uwa/M5V9qRC+znyV6B5CcOInS ODjlB/tk4WeBcaUmumXx5N/PXUWIezitWev7xmxrjBF62BQcg8d5+/5U X-Gm-Gg: AR+sD13Q65OAW4v+hkPQVulQnjaKW8fzaOaMdHIeJE46NoNNhlRpnNTRjkJXwnH2ssC bxmHzu4NTtXHORi8SOBgV3rB3AeIbsiyZci6nhsYPVUFPpq3pVcDM6vZeluJb58XYhFxKWAf5oO 6120QPbanZOk5S60exzs+0GLYFhoVW82CmG0njfbNFrIMKlLxpzPiTAJk+rpt1Qvw8znxgkFNHp Oihd1qERtNA0G1/FaeHVWBSQwyv/F+R21YzKzReTdOFJK5q+1vWr9OTLrflizfItcZuy7NX4Y53 jPMqypWlE7DsU1GDegKoFvRYpkzKaQMbiC+FLnliKsiuhcfLxBipsnQWRUIoMjd8aUkEMXM8BS8 3Hyed/7iTlPHGtuJSV65KD7L56R77x9gaiZOwPg8WHIMvK7vMcRne49AZAYxczzT9xu93FHOWFf 5S3mxxMAEzsfi8hNrD7bGFyxJLkX1OlbPSZSmS2H7yZ6dnPMjKj2vUk/4/ckJ/PnBg/w== X-Received: by 2002:a17:90b:164b:b0:38e:6a44:671b with SMTP id 98e67ed59e1d1-3966cdf6813mr25481388a91.0.1787822595919; Thu, 27 Aug 2026 02:23:15 -0700 (PDT) Received: from Default ([2409:40f4:1015:7531:12c9:ad3b:96d3:4379]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-141a905c18bsm16037789c88.14.2026.08.27.02.23.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Aug 2026 02:23:15 -0700 (PDT) From: Jeffin Philip To: syzbot+d632e93ffcd1452bc61e@syzkaller.appspotmail.com Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: KASAN: slab-use-after-free Read in roccat_open Date: Thu, 27 Aug 2026 14:53:01 +0530 Message-ID: <20260827092301.19883-1-jeffinphilip14@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <6a8fd9c8.50659fcc.60cd.000e.GAE@google.com> References: <6a8fd9c8.50659fcc.60cd.000e.GAE@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit #syz test: upstream 903c1cf6dff9 diff --git a/drivers/hid/hid-roccat.c b/drivers/hid/hid-roccat.c index 4f15eb951039..505844890ed3 100644 --- a/drivers/hid/hid-roccat.c +++ b/drivers/hid/hid-roccat.c @@ -236,6 +236,7 @@ static int roccat_release(struct inode *inode, struct file *file) hid_hw_close(device->hid); } else { roccat_free_device(device); + devices[minor] = NULL; } } diff --git a/drivers/hid/hid-roccat.c b/drivers/hid/hid-roccat.c index 505844890ed3..220666bdd13d 100644 --- a/drivers/hid/hid-roccat.c +++ b/drivers/hid/hid-roccat.c @@ -370,8 +370,11 @@ void roccat_disconnect(int minor) mutex_lock(&devices_lock); device = devices[minor]; + if (!device) { + mutex_unlock(&devices_lock); + return; + } mutex_unlock(&devices_lock); - device->exist = 0; /* TODO exist maybe not needed */ device_destroy(device->dev->class, MKDEV(roccat_major, minor));