From nobody Sun Nov 24 01:02:18 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=linaro.org ARC-Seal: i=1; a=rsa-sha256; t=1728406112; cv=none; d=zohomail.com; s=zohoarc; b=lHXA1XhsH66DN+pxyZCE8qJtMowZVIsNwnDdR/22mr4lMrmcM7YKL2YJ7tPXgW4PTJ8dOmep73kMaPG3o5/6MNimbf+FQT51NOfX4qoQ+cfltTMSLgLgpY5Z0WwP1wwjQjuilL9uzRwc/SGTzp0UFARFk3Dp4+F+we/Kg4m1Yvo= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1728406112; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=oy11i6KMMYbTDLbggIWsMEmjce0qeq1GCqydkwW53Z4=; b=GrYVqfR/xAxSrIKA5rMlJTfCXyneOv3WmofKlqryWCWabd88uXUocBy0r2aPHmtNEjC4ZGtExL0RJWQG3qGTSyZ5yra+0uo+wsoibCcAIL9Q1sr7X8RuFEeAloXvgmnOyos+bb1bqGrVwEgiXeTQ+RUndFx+5TiPnjsH3Irpmvg= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1728406112948377.805150300758; Tue, 8 Oct 2024 09:48:32 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1syDMi-0003BY-5H; Tue, 08 Oct 2024 12:47:16 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1syDMg-0003A2-68 for qemu-devel@nongnu.org; Tue, 08 Oct 2024 12:47:14 -0400 Received: from mail-wr1-x42a.google.com ([2a00:1450:4864:20::42a]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1syDMd-00038M-QK for qemu-devel@nongnu.org; Tue, 08 Oct 2024 12:47:13 -0400 Received: by mail-wr1-x42a.google.com with SMTP id ffacd0b85a97d-37ccfbbd467so4109328f8f.0 for ; Tue, 08 Oct 2024 09:47:11 -0700 (PDT) Received: from orth.archaic.org.uk (orth.archaic.org.uk. [2001:8b0:1d0::2]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-37d32ea1d98sm1490936f8f.68.2024.10.08.09.47.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Oct 2024 09:47:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1728406030; x=1729010830; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=oy11i6KMMYbTDLbggIWsMEmjce0qeq1GCqydkwW53Z4=; b=z1nij1Xk4OWcHCA2SIBISZmZ4YTQRM8qKQPRmMN+KgmAp8Qrye7DbpTXluhZv04g4a PlSIjVyprQfcTeZYKTiQZNmaEEhVHKcDHV2p3aYDT0D5zCpBh+lNTpht7xVcsr8erhlG XYmaPsSF2D/KrHJJbN2In7z2cVL4w2HhiEVumOoPSTkf6xuXFh4bT85SmDaF/Ydu6chJ 7MTULk8giPDSf8cesjGzLpkWWwkybA2h0lVORKEf7i7s3+u2hiyan/cWvZSlR+7L56tL Oik2DZuSEDk7YsMdxSLv9rEeeAaOz5r6Q0dIks+M/VxfxT3Y48+27lKILTYPNUHGZp9H 3LGw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1728406030; x=1729010830; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=oy11i6KMMYbTDLbggIWsMEmjce0qeq1GCqydkwW53Z4=; b=SQGNn883Tq6M0XhkEmMof5mZeC5YcuFbLmIwoa3Ii0A24xJZt6DhLnJtdyyEwXpI72 JQW5c/1DAOsKVVIfhA2VFkeGZDDGxcPQLvssDjCacabRqAe7IjQlw/266Bcti6TijYMf /gYLGk+n3AmJKdIo1SkcXAd0V9sTJiLpoYhTTYJxGGzMx+tyk0Q00W0SYnZQM3yXROI1 yl11mXbrlfY3x11NMnfK4+CUdxTlb6fuT6hFAbWVNEsl0e6EoP5T934dsSZ0w++fKNYN nMCLV6t/0cC/YiPDmHYPwMJEVM9UYbv7z5vuHRX2kC4Tm7ERU3ulhUYN+QRyr4D6+NcM O0PA== X-Gm-Message-State: AOJu0YxZnxmcqgVqdb/t+CYrPUyXB5wBx9tzw3XqDoTydm8xhM3oeep+ 4Y1YJ7qpjIwJJxm7XqUh587Jxmq/uv+K36nMThNeUUVLN3d4ZtJpTUFinPpKGOPWoaBMw9il2sm F X-Google-Smtp-Source: AGHT+IELvK4ZPsLHN9kYlBsYp2uIE3s0agHJbIzujDkzW7K7al85HyLfFq0oD4zaEJc5OXLZCr52uQ== X-Received: by 2002:a05:6000:186f:b0:371:8eb3:603a with SMTP id ffacd0b85a97d-37d0e77a468mr12517212f8f.27.1728406030292; Tue, 08 Oct 2024 09:47:10 -0700 (PDT) From: Peter Maydell To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, Kevin Wolf , Hanna Reitz , Stefan Weil Subject: [PATCH v2 1/4] block/gluster: Use g_autofree for string in qemu_gluster_parse_json() Date: Tue, 8 Oct 2024 17:47:05 +0100 Message-Id: <20241008164708.2966400-2-peter.maydell@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241008164708.2966400-1-peter.maydell@linaro.org> References: <20241008164708.2966400-1-peter.maydell@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::42a; envelope-from=peter.maydell@linaro.org; helo=mail-wr1-x42a.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1728406114816116600 In the loop in qemu_gluster_parse_json() we do: char *str =3D NULL; for(...) { str =3D g_strdup_printf(...); ... if (various errors) { goto out; } ... g_free(str); str =3D NULL; } return 0; out: various cleanups; g_free(str); ... return -errno; Coverity correctly complains that the assignment "str =3D NULL" at the end of the loop is unnecessary, because we will either go back to the top of the loop and overwrite it, or else we will exit the loop and then exit the function without ever reading str again. The assignment is there as defensive coding to ensure that str is only non-NULL if it's a live allocation, so this is intentional. We can make Coverity happier and simplify the code here by using g_autofree, since we never need 'str' outside the loop. Resolves: Coverity CID 1527385 Signed-off-by: Peter Maydell Reviewed-by: Kevin Wolf Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Richard Henderson --- v1->v2: wrap overlong line --- block/gluster.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/block/gluster.c b/block/gluster.c index f03d05251ef..e9c038042b3 100644 --- a/block/gluster.c +++ b/block/gluster.c @@ -514,7 +514,6 @@ static int qemu_gluster_parse_json(BlockdevOptionsGlust= er *gconf, SocketAddressList **tail; QDict *backing_options =3D NULL; Error *local_err =3D NULL; - char *str =3D NULL; const char *ptr; int i, type, num_servers; =20 @@ -547,7 +546,8 @@ static int qemu_gluster_parse_json(BlockdevOptionsGlust= er *gconf, tail =3D &gconf->server; =20 for (i =3D 0; i < num_servers; i++) { - str =3D g_strdup_printf(GLUSTER_OPT_SERVER_PATTERN"%d.", i); + g_autofree char *str =3D g_strdup_printf(GLUSTER_OPT_SERVER_PATTER= N"%d.", + i); qdict_extract_subqdict(options, &backing_options, str); =20 /* create opts info from runtime_type_opts list */ @@ -658,8 +658,6 @@ static int qemu_gluster_parse_json(BlockdevOptionsGlust= er *gconf, =20 qobject_unref(backing_options); backing_options =3D NULL; - g_free(str); - str =3D NULL; } =20 return 0; @@ -668,7 +666,6 @@ out: error_propagate(errp, local_err); qapi_free_SocketAddress(gsconf); qemu_opts_del(opts); - g_free(str); qobject_unref(backing_options); errno =3D EINVAL; return -errno; --=20 2.34.1