linux-kernel - [PATCH AUTOSEL 5.6 52/62] tools/bootconfig: Fix resource leak in apply

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Message-Id: <20200514185147.19716-52-sashal@kernel.org>
Date:   Thu, 14 May 2020 14:51:37 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Yunfeng Ye <yeyunfeng@...wei.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH AUTOSEL 5.6 52/62] tools/bootconfig: Fix resource leak in apply_xbc()

From: Yunfeng Ye <yeyunfeng@...wei.com>

[ Upstream commit 8842604446d1f005abcbf8c63c12eabdb5695094 ]

Fix the @data and @fd allocations that are leaked in the error path of
apply_xbc().

Link: http://lkml.kernel.org/r/583a49c9-c27a-931d-e6c2-6f63a4b18bea@huawei.com

Acked-by: Masami Hiramatsu <mhiramat@...nel.org>
Signed-off-by: Yunfeng Ye <yeyunfeng@...wei.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@...dmis.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 tools/bootconfig/main.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/tools/bootconfig/main.c b/tools/bootconfig/main.c
index a9b97814d1a93..5dbe893cf00cc 100644
--- a/tools/bootconfig/main.c
+++ b/tools/bootconfig/main.c
@@ -287,6 +287,7 @@ int apply_xbc(const char *path, const char *xbc_path)
 	ret = delete_xbc(path);
 	if (ret < 0) {
 		pr_err("Failed to delete previous boot config: %d\n", ret);
+		free(data);
 		return ret;
 	}
 
@@ -294,24 +295,26 @@ int apply_xbc(const char *path, const char *xbc_path)
 	fd = open(path, O_RDWR | O_APPEND);
 	if (fd < 0) {
 		pr_err("Failed to open %s: %d\n", path, fd);
+		free(data);
 		return fd;
 	}
 	/* TODO: Ensure the @path is initramfs/initrd image */
 	ret = write(fd, data, size + 8);
 	if (ret < 0) {
 		pr_err("Failed to apply a boot config: %d\n", ret);
-		return ret;
+		goto out;
 	}
 	/* Write a magic word of the bootconfig */
 	ret = write(fd, BOOTCONFIG_MAGIC, BOOTCONFIG_MAGIC_LEN);
 	if (ret < 0) {
 		pr_err("Failed to apply a boot config magic: %d\n", ret);
-		return ret;
+		goto out;
 	}
+out:
 	close(fd);
 	free(data);
 
-	return 0;
+	return ret;
 }
 
 int usage(void)
-- 
2.20.1