linux-kernel - [PATCH 2/2] tools: hv: Use CLOEXEC when opening kvp

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Date:	Tue,  8 Jan 2013 12:26:43 +0100
From:	Tomas Hozza <thozza@...hat.com>
To:	gregkh@...uxfoundation.org
Cc:	kys@...rosoft.com, jasowang@...hat.com, haiyangz@...rosoft.com,
	linux-kernel@...r.kernel.org, habdi@...rosoft.com,
	Tomas Hozza <thozza@...hat.com>
Subject: [PATCH 2/2] tools: hv: Use CLOEXEC when opening kvp_pool files

Use CLOEXEC flag when opening kvp_pool_x files to prevent file
descriptor leakage. Not using it was causing a problem when
SELinux was enabled.

Signed-off-by: Tomas Hozza <thozza@...hat.com>
---
 tools/hv/hv_kvp_daemon.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/hv/hv_kvp_daemon.c b/tools/hv/hv_kvp_daemon.c
index 6b56b75..31f839cc 100644
--- a/tools/hv/hv_kvp_daemon.c
+++ b/tools/hv/hv_kvp_daemon.c
@@ -151,7 +151,7 @@ static void kvp_update_file(int pool)
 	 */
 	kvp_acquire_lock(pool);
 
-	filep = fopen(kvp_file_info[pool].fname, "w");
+	filep = fopen(kvp_file_info[pool].fname, "we");
 	if (!filep) {
 		kvp_release_lock(pool);
 		syslog(LOG_ERR, "Failed to open file, pool: %d", pool);
@@ -182,7 +182,7 @@ static void kvp_update_mem_state(int pool)
 
 	kvp_acquire_lock(pool);
 
-	filep = fopen(kvp_file_info[pool].fname, "r");
+	filep = fopen(kvp_file_info[pool].fname, "re");
 	if (!filep) {
 		kvp_release_lock(pool);
 		syslog(LOG_ERR, "Failed to open file, pool: %d", pool);
@@ -246,13 +246,13 @@ static int kvp_file_init(void)
 		records_read = 0;
 		num_blocks = 1;
 		sprintf(fname, "/var/opt/hyperv/.kvp_pool_%d", i);
-		fd = open(fname, O_RDWR | O_CREAT, S_IRUSR | S_IWUSR | S_IROTH);
+		fd = open(fname, O_RDWR | O_CREAT | O_CLOEXEC, S_IRUSR | S_IWUSR | S_IROTH);
 
 		if (fd == -1)
 			return 1;
 
 
-		filep = fopen(fname, "r");
+		filep = fopen(fname, "re");
 		if (!filep)
 			return 1;
 
-- 
1.7.11.7

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