From 52d4444f8eec1a4e7e0861859c705c3a558b4e2a Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Wed, 26 Jun 2013 21:35:56 -0400
Subject: [PATCH] in sem_open, don't leak vm mapping if fstat fails

fstat should not fail under normal circumstances, so this fix is
mostly theoretical.
---
 src/thread/sem_open.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/thread/sem_open.c b/src/thread/sem_open.c
index ed2353c8..8a72d4c6 100644
--- a/src/thread/sem_open.c
+++ b/src/thread/sem_open.c
@@ -82,8 +82,8 @@ sem_t *sem_open(const char *name, int flags, ...)
 		if (flags != (O_CREAT|O_EXCL)) {
 			fd = open(name, FLAGS);
 			if (fd >= 0) {
-				if ((map = mmap(0, sizeof(sem_t), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0)) == MAP_FAILED ||
-				    fstat(fd, &st) < 0) {
+				if (fstat(fd, &st) < 0 ||
+				    (map = mmap(0, sizeof(sem_t), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0)) == MAP_FAILED) {
 					close(fd);
 					goto fail;
 				}
-- 
GitLab