From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E4C8A426D34; Tue, 31 Mar 2026 16:32:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774974758; cv=none; b=GyjalewRUf6JT4qh+lY2vsQSe7IH92IVBx827gkHp7jsw14L5OIUwCIJZEd1RiKxbQgoHOEzysLfyv5G+SQgeKqV8WZAIykRcKPm+BYObWERl5Q5tpWvLgUHaz6cnXRe0s7dxdJD43y42A+RnSE1h4gi9GFNwHw0HJr/T+BmwyA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774974758; c=relaxed/simple; bh=BSn0zvW0a4SuID1hpbpvYAf/B0GQTwXekQbRP/v6lpM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=ps8DrWPv1Kw1QyX1eNqUXyjLviKaGBmZrQ2AAOxvdspIzoyNZDOWsgtJw5OoSnSQ8X0ypnxbzvRnQby9Hal9vKzNU+8ZJRx11tJHFI/E3HSaGnOvSmd/nKK37U3JIRujlR73JuM1bOB+PUHv4zpJ3cOh2mxcRhApIi/Ch/qm+Oc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ABVokaux; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="ABVokaux" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 79728C19424; Tue, 31 Mar 2026 16:32:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1774974757; bh=BSn0zvW0a4SuID1hpbpvYAf/B0GQTwXekQbRP/v6lpM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ABVokauxKbnlnbMnCk8dTapSFTHbhsC2bvf0ShjoKcpw19l2Cfco/I4A3wn8pd3Qc 8cwapUeL2ZHHBk+qLfZJeJqh3g7xcg/ndbI+9bcKRn5GDcFQkX2Pt1rUsuKZBZnhwh jbVAr16EqJcfPqdgmLu74ntqjV6h6iz4C2bU1jvs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, =?UTF-8?q?G=C3=BCnther=20Noack?= , Benjamin Tissoires , Sasha Levin Subject: [PATCH 6.19 033/342] HID: magicmouse: avoid memory leak in magicmouse_report_fixup() Date: Tue, 31 Mar 2026 18:17:46 +0200 Message-ID: <20260331161800.125980157@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260331161758.909578033@linuxfoundation.org> References: <20260331161758.909578033@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 6.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Günther Noack [ Upstream commit 91e8c6e601bdc1ccdf886479b6513c01c7e51c2c ] The magicmouse_report_fixup() function was returning a newly kmemdup()-allocated buffer, but never freeing it. The caller of report_fixup() does not take ownership of the returned pointer, but it *is* permitted to return a sub-portion of the input rdesc, whose lifetime is managed by the caller. Assisted-by: Gemini-CLI:Google Gemini 3 Signed-off-by: Günther Noack Signed-off-by: Benjamin Tissoires Signed-off-by: Sasha Levin --- drivers/hid/hid-magicmouse.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c index f4cf29c2e8330..9eadf3252d0dc 100644 --- a/drivers/hid/hid-magicmouse.c +++ b/drivers/hid/hid-magicmouse.c @@ -994,9 +994,7 @@ static const __u8 *magicmouse_report_fixup(struct hid_device *hdev, __u8 *rdesc, hid_info(hdev, "fixing up magicmouse battery report descriptor\n"); *rsize = *rsize - 1; - rdesc = kmemdup(rdesc + 1, *rsize, GFP_KERNEL); - if (!rdesc) - return NULL; + rdesc = rdesc + 1; rdesc[0] = 0x05; rdesc[1] = 0x01; -- 2.51.0