From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=117.135.210.5 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792489062; b=SgH+wf4zfQ/eXLt7rghLgDBn5IQxRoAiMueBQl4mU8mOhpi8u62vVA+LX4nZfV+sgNQ/ y3LGtXR3vXrO89XVhD4lK41ywrzva4xE3aQPfsGaYywLYUXmF/a7s+7G1d33sxVgGPml0 s0BbMhzIovj7qHy0uEWMwnypOlLUAsy7m7bwUE/jdj/YtkV6GpzmHDH0g3JubL8GFhmM5 W4rPxoXzquZ7/E1qG/Jt0dv74WRwCO8iDMdHY/K93uTRd90NBW4zYbGhgwBBsJ0n8dThe 6BTUP5aUcS14kJUhweOq4L498FMffhykBeASZCW//ESrwBuvxrQlRV0vQilBNKzISwA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792489062; h=DMARC-Filter:DKIM-Signature:Received:From:To:Cc:Subject:Date: Message-Id:X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding:X-CM-TRANSID:X-Coremail-Antispam: X-CM-SenderInfo; bh=2cNlWNUoqUDDPQ6xXQ6ALQf3E5zOR4LUyb7Im43c3BQ=; b=BcsKw81lZM0zO6DlOD8zUqqqr4PjgHvzhX6K+fp0X0iULsNwXKf9z/K1I/SU83o8Zizf +zKn+Z5mz7ebNbN/JdsicWj2phkC4nnZi/Bpr9OXS/adPkSpBYNVzcIJROlHWPQqh2Kh4 sfmiT6NSZHkeneaffQFSYEf8YiZs/wFV7mN/sYE9U3Kd8hKidcdkaO1apZv4DHJyaFsUC Ys8K9sbiOZ5fhoyGm9iT/rijNnrH35jSYHOdiy1AITx6BKcLO3S81qelq4xNxGLHb5/RV pQzxwtoXEOw1TRQcezflZggGMyLc34du4ilTo2Enf5hrAkXRbc7YTVGXwDq193HCUcw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=163.com; spf=pass smtp.mailfrom=163.com; dkim=pass header.d=163.com header.i=@163.com header.a=rsa-sha256 header.s=s110527 header.b=KCPucJyT; arc=none smtp.remote-ip=117.135.210.5 Received: from m16.mail.163.com (m16.mail.163.com [117.135.210.5]) (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 2DD2B60A2615; Tue, 20 Oct 2026 09:37:39 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 2DD2B60A2615 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=163.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=163.com Authentication-Results: smtp.subspace.kernel.org; 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; 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-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list 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 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