From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2349B606A33E for ; Tue, 20 Oct 2026 09:37:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=MftSExS1; dkim=pass (1024-bit key, unprotected) header.d=163.com header.i=@163.com header.a=rsa-sha256 header.s=s110527 header.b=KCPucJyT DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=2cNlWNUoqUDDPQ6xXQ6ALQf3E5zOR4LUyb7Im43c3BQ=; b=MftSExS18+r4weiUcdRI2BysRU D05d7frFNJ3IoWSIG8IYeyaj0RCysfdPB4KyGMLRHbmF/ZExPr+Gu74dNxpcWATS1Giw9JTPE1v2e B8P0xvAsteHxYCP+WRm0LQ+lL4hjg2GuqFRILcpk/GvKwKK4rNkRKBY1mfqJNPzg/F1wzfys/TlH1 4fy0b/o9F1HDkohmTH+VV2FrwV+bjbkzV3OPuhYPw1zD7xw9pbfNSnsvKxacRgk6cKJjEQfXhDQDt J9rIqPHZDjXMuj+AZI3IlsHW+Ji6A+33qxBDIIxVm8/E3OgxCxzy1LUQo5kCvhJFnaRyPHhBRT7Zo xHgNBnuA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xJ6HB-00000009IMF-3Och; Tue, 20 Oct 2026 09:36:57 +0000 Received: from m16.mail.163.com ([220.197.31.4]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xJ6H9-00000009IIu-0gCn for linux-arm-kernel@lists.infradead.org; Tue, 20 Oct 2026 09:36:56 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=2c NlWNUoqUDDPQ6xXQ6ALQf3E5zOR4LUyb7Im43c3BQ=; b=KCPucJyTQYq480p8S5 YUxPK+cRgY1cqP/CoxWv6U1KHJASMP5qs65wEj68wZTIXGaCQ/GG5G5/bY6wAxWG WwmJntGoH67r5427dHSBlc5yZ6v24EMMaFlQnHdyvovwhEcBmmfMSt7Z4yxRYPmF dUEbYMIQS1WUwktj6lbZ5AKpc= Received: from pc.localdomain (unknown []) by gzsmtp1 (Coremail) with SMTP id PCgvCgD3_4ImNtdqupV5Aw--.29320S5; Tue, 20 Oct 2026 17:36:44 +0800 (CST) From: Jiale Yao To: Gatien Chevallier , Maxime Coquelin , Alexandre Torgue , linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org Subject: [PATCH 3/3] bus: stm32-rifsc: reject debugfs setup without match data Date: Tue, 20 Oct 2026 17:36:35 +0800 Message-Id: <20261020093637.1654161-4-yaojiale02@163.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20261020093637.1654161-1-yaojiale02@163.com> References: <20261020093637.1654161-1-yaojiale02@163.com> X-Archived-By: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID: PCgvCgD3_4ImNtdqupV5Aw--.29320S5 X-Coremail-Antispam: 1Uf129KBjvdXoWrZr13Ar1fKr43Xr15Gw43Awb_yoWkCrgEka 92qa4xJrsrKrykGw1xZrnxZ3ya9w4UX34rXF4aqr93G39rXrn5XrZxXrZ7Aw47uws8u398 CFykAr13Zw1xCjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7IUnpHq3UUUUU== X-CM-SenderInfo: x1dryxhdohiji6rwjhhfrp/xtbCzgwpY2rXNiymTQAA3E X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261020_023655_609664_7EA24533 X-CRM114-Status: UNSURE ( 9.93 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -1.8 (-) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 Platform driver_override can bind a device to this driver without a matching OF entry. With debugfs enabled, of_device_get_match_data() then returns NULL and the configuration dump dereferences the resource name table. Reject debugfs registration without match data before exposing the configuration file. Fixes: 3bae4748c1cdd ("bus: rifsc: add debugfs entry to dump the firewall configuration") Cc: stable@vger.kernel.org Signed-off-by: Jiale Yao --- drivers/bus/stm32_rifsc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/bus/stm32_rifsc.c b/drivers/bus/stm32_rifsc.c index 19d10379dcef..dd008103b9c1 100644 --- a/drivers/bus/stm32_rifsc.c +++ b/drivers/bus/stm32_rifsc.c @@ -617,6 +617,8 @@ static int stm32_rifsc_register_debugfs(struct stm32_firewall_controller *rifsc_ rifsc_priv->nb_rimu = nb_rimu; rifsc_priv->nb_risal = nb_risal; rifsc_priv->res_names = of_device_get_match_data(rifsc_controller->dev); + if (!rifsc_priv->res_names) + return -ENODATA; root = debugfs_lookup("stm32_firewall", NULL); if (!root) -- 2.34.1