From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 AA8BA377EDC; Fri, 4 Sep 2026 05:49:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788500951; cv=none; b=T1IdxIz8ZjOpBD0db3a9YujbWFQas3eiIuRuPRAQKmqBvZjPrM4+0QpNWeW9CPDabwaqQ4EMyOjt2rPSMNU3qRVb2CM3CKz+xbe5wmBPBjb3qj3z8gzV0ZvD3py/c3qW6w6bIbkZncYSYVG/KdMXJu+7Pkx8U1EA4GJ/PEXz+ws= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788500951; c=relaxed/simple; bh=44xeC1BCkaphD9hgpnQolfBIiRqwJ4LMlLPq3/Li5xE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=GQS60510U7z5y78Sq3vaOGrljeww0DOmdkr/9P0gbgF/pLXVAduNtmyRoIRTVjLjNGcqjSRPtfDt8KvZIfxLQznbFRpXE6V66w/zXGAlhIrAcvEvXI9zqSxg9wRtVGhxOjhkCdrhcvt4lw4C+Nmr2BoAdfiTIu0pG+EwRasXSVY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=U8/gRvG0; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="U8/gRvG0" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BFFD21F00A3D; Fri, 4 Sep 2026 05:49:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1788500949; bh=nHWTLFcVZYUKbMd9PuXA9pmwwcp4FOEz2JpWlfaKDl8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=U8/gRvG08tScSwinWs0utLSmbfWDqycOFEYImOyISP09KNFfJshzjJ+4sFW/63WUS gcSkvKQ4ly+AIPY52Gm4oz8ivas3C+F05RSGOtsnqoGBwLwsElJCsfH7teTTjOA/H4 HJp62TVXoT7M1itzgl383Ks+SklGFpHDgkdBJ5YE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Ilya Krutskih , Mikulas Patocka Subject: [PATCH 6.18 237/552] dm raid1: reserve space for NUL-terminator in build_constructor_string() Date: Fri, 4 Sep 2026 06:56:34 +0200 Message-ID: <20260904045754.853720348@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260904045747.813364717@linuxfoundation.org> References: <20260904045747.813364717@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev 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: Ilya Krutskih commit 73c37fe54cd056d07461b142ab0b8b81e1ef6ad8 upstream. Reserve space for the termination NUL after the maximum 20 decimal digits of a long long value to avoid buffer overflow in sprintf(). Fixes: f5db4af466e2 ("dm raid1: add userspace log") Cc: stable@vger.kernel.org Signed-off-by: Ilya Krutskih Signed-off-by: Mikulas Patocka Signed-off-by: Greg Kroah-Hartman --- drivers/md/dm-log-userspace-base.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/md/dm-log-userspace-base.c +++ b/drivers/md/dm-log-userspace-base.c @@ -139,6 +139,7 @@ static int build_constructor_string(stru str_size += strlen(argv[i]) + 1; /* +1 for space between args */ str_size += 20; /* Max number of chars in a printed u64 number */ + str_size++; /* For NUL-terminator */ str = kzalloc(str_size, GFP_KERNEL); if (!str) {