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 68F2C13C693; Sun, 24 Mar 2024 23:39:24 +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=1711323564; cv=none; b=PmwhuCyptQsv73cvvcXdqTemzjt/wup2mI5NJbfDrSlErj4Z6KzJcRS3jzRIeBdCqr8HaCzbM3fBevPbMRHZuIdelGNFOdws22G296fie/yvGLJ6T95g9HOwutXEdNVXkKRRz4Ss630LzCzCGV/NPhtDXPfO/YHaxOStGnMVL8c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711323564; c=relaxed/simple; bh=Roie6MsJdNvp73cKniu3QDUBbywUVPcSI2K9N8bQLTQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=tHkQO+kxrO0Y3SsQyoB7/xO+aumpYT6zm9zS9eiRtQkGU0RqL1elGc3mZ+b+VdnYnVtp1Ch0jmLnpDkT0LKGsY2NNrJmAqKgl9BlC1ziBIwBTvSr8QvXShQYkIdCX7OxiUXtJUv6aKlSP4URve31/Ewj0dDIOSWKHpninhmCMA0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=sOLc41Is; 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="sOLc41Is" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8AD5EC433F1; Sun, 24 Mar 2024 23:39:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1711323564; bh=Roie6MsJdNvp73cKniu3QDUBbywUVPcSI2K9N8bQLTQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sOLc41IsPszOiRRjheGm/ii9McJAXwiwsg8QPVDUXMBd4Oijd0j6+XU3JSQgvgAcb Wb/PJHZwJaWnaBAS4FrWlP84iQ2udj4w8LD1CglfZn1xCq1PhMvkoepVZxXxL7oiob Z/EykgStK2BV6IuZcAsE/ZupWKenu1nWAVw14b+qYMJy5LpfEARSrWqvTk7x0DgWnj Bzjl05/PGFGLC+evhcCRthyZx6V0P+tvG0/qNufLyllvwkbAX5/zVN0vRZasTen1lW AGR7iNT+Td/qhaxEqthbIKoYEmSG4pp4ZgqzE3Lt4INAMfuLJGXRqna1CZ7fpZe1/J GOvMsYVywwgTA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Christophe JAILLET , Benjamin Coddington , Trond Myklebust , Sasha Levin Subject: [PATCH 5.15 271/317] NFS: Fix an off by one in root_nfs_cat() Date: Sun, 24 Mar 2024 19:34:11 -0400 Message-ID: <20240324233458.1352854-272-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240324233458.1352854-1-sashal@kernel.org> References: <20240324233458.1352854-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit From: Christophe JAILLET [ Upstream commit 698ad1a538da0b6bf969cfee630b4e3a026afb87 ] The intent is to check if 'dest' is truncated or not. So, >= should be used instead of >, because strlcat() returns the length of 'dest' and 'src' excluding the trailing NULL. Fixes: 56463e50d1fc ("NFS: Use super.c for NFSROOT mount option parsing") Signed-off-by: Christophe JAILLET Reviewed-by: Benjamin Coddington Signed-off-by: Trond Myklebust Signed-off-by: Sasha Levin --- fs/nfs/nfsroot.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/nfs/nfsroot.c b/fs/nfs/nfsroot.c index fa148308822cc..c2cf4ff628811 100644 --- a/fs/nfs/nfsroot.c +++ b/fs/nfs/nfsroot.c @@ -175,10 +175,10 @@ static int __init root_nfs_cat(char *dest, const char *src, size_t len = strlen(dest); if (len && dest[len - 1] != ',') - if (strlcat(dest, ",", destlen) > destlen) + if (strlcat(dest, ",", destlen) >= destlen) return -1; - if (strlcat(dest, src, destlen) > destlen) + if (strlcat(dest, src, destlen) >= destlen) return -1; return 0; } -- 2.43.0