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 C62E53D75D9; Tue, 31 Mar 2026 16:24:23 +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=1774974263; cv=none; b=ACCljngd27PCkHCi3g/IXO+U7HHf3VDnzP24bswlK8l5/kQtdpwNElj5VJKSCGtycalQMYR3fKpmslQ9t2lckxgWS0ky6dmchyePM71Ke7MrLveBB+u8HAQ4kSo8ptrEYE9xmi/gn8N6etxvL8oc8duFo6uGKOiQB91SmXiXyjw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774974263; c=relaxed/simple; bh=tVYGE6ZWQruoOMT32QU9x0dSbzARHehzNiXzC38V2M8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=rskx6bkPvictWluPD6onQhJKGq7r6xSagckQDa7dkTAGibDkydBKjmndXMCYrm+DaH/jUrSWwQkxJc3N6C8IDrlkfc8ehoqklrLirbzguCZgIjkYltjmJwKwMGANnkIosp8dGozM148+UtQo6PUDrHStJSyOZ8OaemBt/sWsJ7I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=gaHnRBB8; 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="gaHnRBB8" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E71EFC19423; Tue, 31 Mar 2026 16:24:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1774974263; bh=tVYGE6ZWQruoOMT32QU9x0dSbzARHehzNiXzC38V2M8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gaHnRBB8tD2m6uHttlZzfquzr06edmYk1dkyzawcQEPFZIUveXMEf4soZNqOhP+Po 6b1oQYeHocowyFYuq1kWtLg+UVkI7hWST0ZYUHhzkvZZGCMsSqfEAK++mr5yHGClk5 Xwo+a97K2+SrMim2GjEDm0rAofomOVzQqoGsXq14= 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 6.6 018/175] HID: magicmouse: avoid memory leak in magicmouse_report_fixup() Date: Tue, 31 Mar 2026 18:20:02 +0200 Message-ID: <20260331161730.452607198@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260331161729.779738837@linuxfoundation.org> References: <20260331161729.779738837@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 6.6-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 bb725dfcef196..d5df2745f3da4 100644 --- a/drivers/hid/hid-magicmouse.c +++ b/drivers/hid/hid-magicmouse.c @@ -967,9 +967,7 @@ static __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