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 721E23A9D88 for ; Mon, 23 Mar 2026 13:19:13 +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=1774271953; cv=none; b=O1QooGYnoEUa7RXqL8knCsGNiqD6TA4NCGJ1nyUL/zEKZcLlC2183HWyz/e6AJ1aWsmlP2oohv2W28wkolYHshVG2QL/U1MiACAGYq79G+rm4ytqaO+2BlqeE+KqXihh1czC+25LHSlGfyzOr8d9EfY+DWapI9w19RPOamprgWc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774271953; c=relaxed/simple; bh=5RFSHrSy0T0N8TKyFd5rGOjqnVR8zENTugr+DmETkVI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Nx7Jvk4UCkuW6Jb1c88i5sxcX2NzxAgoIzshNtmvRxh7K1DoaFAwGOMYdWLz2CDCSOWAhyQLHmquRPilGDMBJrYEznSsK86xJediNjpH5KIX7d+PKOWsiA8YPzLQ7qI+qy9HqFFFu9ft3ZtalSAS590MLaeItiahKrCOHzYY0rQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=i5/YkYnZ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="i5/YkYnZ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8ED0BC2BC9E; Mon, 23 Mar 2026 13:19:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774271953; bh=5RFSHrSy0T0N8TKyFd5rGOjqnVR8zENTugr+DmETkVI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=i5/YkYnZKDpKqT/pN1Sa6p/OIfxp+GRPoQuYzogfCcZmjdqHjUkEvJU+o4G2a4hTF cqbKqiI01RGav29MBoKIox1y3KhM4PwIOAJfbPnS47fvkAq+eP3EZOiJNauHWNEXK9 KJt1uyHfwVvccVIJ9RTf0x+LnhENr9OCNt024oXBCmCkh4jH2kxQoep/XzV3JEf3zA q+UJvwMpK32P8dceEH1wFdnzFhxx7kqtj1AMKleEMbGfpQN7mI2A/FZiPChCkz5uAl GHD7wo8cwkxee/uMRTtFq3uF5ydU+wCoZzNhENF4r48XpVtRdynIXXti5UiO4Ttpyf iZBH/obckz4VQ== From: Sasha Levin To: stable@vger.kernel.org Cc: Johan Hovold , =?UTF-8?q?Bence=20Cs=C3=B3k=C3=A1s?= , Andi Shyti , Sasha Levin Subject: [PATCH 5.15.y 2/2] i2c: cp2615: fix serial string NULL-deref at probe Date: Mon, 23 Mar 2026 09:19:10 -0400 Message-ID: <20260323131910.1715046-2-sashal@kernel.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260323131910.1715046-1-sashal@kernel.org> References: <2026032348-savor-throbbing-4586@gregkh> <20260323131910.1715046-1-sashal@kernel.org> 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 From: Johan Hovold [ Upstream commit aa79f996eb41e95aed85a1bd7f56bcd6a3842008 ] The cp2615 driver uses the USB device serial string as the i2c adapter name but does not make sure that the string exists. Verify that the device has a serial number before accessing it to avoid triggering a NULL-pointer dereference (e.g. with malicious devices). Fixes: 4a7695429ead ("i2c: cp2615: add i2c driver for Silicon Labs' CP2615 Digital Audio Bridge") Cc: stable@vger.kernel.org # 5.13 Cc: Bence Csókás Signed-off-by: Johan Hovold Reviewed-by: Bence Csókás Signed-off-by: Andi Shyti Link: https://lore.kernel.org/r/20260309075016.25612-1-johan@kernel.org Signed-off-by: Sasha Levin --- drivers/i2c/busses/i2c-cp2615.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/i2c/busses/i2c-cp2615.c b/drivers/i2c/busses/i2c-cp2615.c index 20f8f7c9a8cd4..8e17f32d38c06 100644 --- a/drivers/i2c/busses/i2c-cp2615.c +++ b/drivers/i2c/busses/i2c-cp2615.c @@ -298,6 +298,9 @@ cp2615_i2c_probe(struct usb_interface *usbif, const struct usb_device_id *id) if (!adap) return -ENOMEM; + if (!usbdev->serial) + return -EINVAL; + strscpy(adap->name, usbdev->serial, sizeof(adap->name)); adap->owner = THIS_MODULE; adap->dev.parent = &usbif->dev; -- 2.51.0