From 2cab2d43b83bddd44ecc1f267afb5e2725975ac7 Mon Sep 17 00:00:00 2001
From: Ka Ho Ng <khng@FreeBSD.org>
Date: Tue, 27 Jun 2023 15:33:46 -0400
Subject: [PATCH] syscalls: fix modspecific_t stack content leak

Zero-initialize the whole modspecific_t so that there would
not be kernel stack content leak in the unused part.

Sponsored by:	Juniper Networks, Inc.
MFC after:	1 days
Differential Revision:	https://reviews.freebsd.org/D40815
---
 sys/kern/kern_syscalls.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/kern/kern_syscalls.c b/sys/kern/kern_syscalls.c
index a6e515fc0ce..234e51cfd28 100644
--- a/sys/kern/kern_syscalls.c
+++ b/sys/kern/kern_syscalls.c
@@ -173,7 +173,7 @@ kern_syscall_module_handler(struct sysent *sysents, struct module *mod,
     int what, void *arg)
 {
 	struct syscall_module_data *data = arg;
-	modspecific_t ms;
+	modspecific_t ms = { 0 };
 	int error;
 
 	switch (what) {