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 B636730FF20; Tue, 31 Mar 2026 17:08:20 +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=1774976900; cv=none; b=JUrEBCf/KFKG3W70SAMT4grDtR4vDZxyo+wXaWXcgfVWswVWMTR94gq/f0EV3sUyoSleLBH2DwayxthnDHAfsEX25THEhgeOqaUJnp6CBzxOJjEeFEr6togQBYxWvqiUO7n8cDJRZamy+84hyLyWe9RVF96t2bft4CNoJuTi1CI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774976900; c=relaxed/simple; bh=6wUs0/PZoxBNbFbmQRCTdiOiivNfC3wDd+9wQ7ObKSI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SH/aN/+SvQXQarxKcZzKdLJzfLjq16owr70DXrwEKiIZnFEZAWAddEJrvSjsELslhDmdhNlFxQZXpKSK/sC3WSLI1lfCA+yrSBJM9h6U329mpw6xCnx6wWWav+twjM9oEkS7RJxMXhiN3stWNmuzTv1KYvHs2rJ1FyVrpNJr2ng= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=2kSAnypk; 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="2kSAnypk" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 39B8AC19423; Tue, 31 Mar 2026 17:08:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1774976900; bh=6wUs0/PZoxBNbFbmQRCTdiOiivNfC3wDd+9wQ7ObKSI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2kSAnypk84J+aqKMlt6auOeFO9ztDvDS/L0MrmwRpC1eILyuAMfA3xcK6Ugogn3DL ycisgxDmsvtWhIN5y4CfiejWVUek9QKFFP9aXGWttBFCKXZu0zzN/cft6cOqbtDSEK aEnSsyklI6Xut+eP4X534GvrFglOgWlI4F5NZHQU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Li Jun , Huacai Chen Subject: [PATCH 6.18 238/309] LoongArch: Fix missing NULL checks for kstrdup() Date: Tue, 31 Mar 2026 18:22:21 +0200 Message-ID: <20260331161802.337584551@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260331161753.468533260@linuxfoundation.org> References: <20260331161753.468533260@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-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Li Jun commit 3a28daa9b7d7c2ddf2c722e9e95d7e0928bf0cd1 upstream. 1. Replace "of_find_node_by_path("/")" with "of_root" to avoid multiple calls to "of_node_put()". 2. Fix a potential kernel oops during early boot when memory allocation fails while parsing CPU model from device tree. Cc: stable@vger.kernel.org Signed-off-by: Li Jun Signed-off-by: Huacai Chen Signed-off-by: Greg Kroah-Hartman --- arch/loongarch/kernel/env.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) --- a/arch/loongarch/kernel/env.c +++ b/arch/loongarch/kernel/env.c @@ -42,16 +42,15 @@ static int __init init_cpu_fullname(void int cpu, ret; char *cpuname; const char *model; - struct device_node *root; /* Parsing cpuname from DTS model property */ - root = of_find_node_by_path("/"); - ret = of_property_read_string(root, "model", &model); + ret = of_property_read_string(of_root, "model", &model); if (ret == 0) { cpuname = kstrdup(model, GFP_KERNEL); + if (!cpuname) + return -ENOMEM; loongson_sysconf.cpuname = strsep(&cpuname, " "); } - of_node_put(root); if (loongson_sysconf.cpuname && !strncmp(loongson_sysconf.cpuname, "Loongson", 8)) { for (cpu = 0; cpu < NR_CPUS; cpu++)