From d0705543e0b3733b12e8643a3962b77834b24209 Mon Sep 17 00:00:00 2001
From: Itay Bookstein <itay.bookstein@nextsilicon.com>
Date: Sun, 19 Jul 2026 13:00:40 +0000
Subject: [PATCH] Use O_CLOEXEC when opening THP sysfs file in init_thp_state.

---
 src/pages.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/pages.c b/src/pages.c
index bd0e62da..ed802a0e 100644
--- a/src/pages.c
+++ b/src/pages.c
@@ -826,8 +826,16 @@ init_thp_state(void) {
 	static const char sys_state_never[] = "always madvise [never]\n";
 	char              buf[sizeof(sys_state_madvise)];
 
+#	if defined(O_CLOEXEC)
+	int fd = malloc_open(
+	    "/sys/kernel/mm/transparent_hugepage/enabled", O_RDONLY | O_CLOEXEC);
+#	else
 	int fd = malloc_open(
 	    "/sys/kernel/mm/transparent_hugepage/enabled", O_RDONLY);
+	if (fd != -1) {
+		fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
+	}
+#	endif
 	if (fd == -1) {
 		goto label_error;
 	}