From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9E213C77B7A for ; Sat, 3 Jun 2023 13:31:59 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4QYLPn3YFQz3dyd for ; Sat, 3 Jun 2023 23:31:57 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.alibaba.com (client-ip=115.124.30.98; helo=out30-98.freemail.mail.aliyun.com; envelope-from=hsiangkao@linux.alibaba.com; receiver=) Received: from out30-98.freemail.mail.aliyun.com (out30-98.freemail.mail.aliyun.com [115.124.30.98]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4QYLPg0xnKz3cCy for ; Sat, 3 Jun 2023 23:31:50 +1000 (AEST) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R421e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046060;MF=hsiangkao@linux.alibaba.com;NM=1;PH=DS;RN=2;SR=0;TI=SMTPD_---0VkDiWob_1685799100; Received: from e18g06460.et15sqa.tbsite.net(mailfrom:hsiangkao@linux.alibaba.com fp:SMTPD_---0VkDiWob_1685799100) by smtp.aliyun-inc.com; Sat, 03 Jun 2023 21:31:42 +0800 From: Gao Xiang To: linux-erofs@lists.ozlabs.org Subject: [PATCH 2/2] erofs-utils: fix EOD behavior when len is too large Date: Sat, 3 Jun 2023 21:31:30 +0800 Message-Id: <20230603133130.34364-2-hsiangkao@linux.alibaba.com> X-Mailer: git-send-email 2.24.4 In-Reply-To: <20230603133130.34364-1-hsiangkao@linux.alibaba.com> References: <20230603133130.34364-1-hsiangkao@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linux-erofs@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development of Linux EROFS file system List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Gao Xiang Errors-To: linux-erofs-bounces+linux-erofs=archiver.kernel.org@lists.ozlabs.org Sender: "Linux-erofs" Otherwise, read_count could be overflow and causes unexpected behaviors. Signed-off-by: Gao Xiang --- lib/io.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/io.c b/lib/io.c index 9e30b7e..9d718ab 100644 --- a/lib/io.c +++ b/lib/io.c @@ -289,7 +289,7 @@ int dev_read(int device_id, void *buf, u64 offset, size_t len) erofs_info("Reach EOF of device - %s:[%" PRIu64 ", %zd].", erofs_devname, offset, len); memset(buf, 0, len); - read_count = len; + return 0; } else if (errno != EINTR) { erofs_err("Failed to read data from device - %s:[%" PRIu64 ", %zd].", erofs_devname, offset, len); -- 2.24.4