slirp: fix memleak of guestfwd command

Ensure that the command for the `-net user,smb=...` or `-net
user,guestfwd=...-cmd:...` is freed. Reported by ASAN.

Signed-off-by: Peter Wu <peter@lekensteyn.nl>

1 files changed, 15 insertions, 0 deletions

diff --git a/slirp/misc.c b/slirp/misc.c
index 260187b6b6..1940a8a75f 100644
--- a/slirp/misc.c
+++ b/slirp/misc.c
@@ -59,6 +59,21 @@ int add_exec(struct ex_list **ex_ptr, int do_pty, char *exec,
 	return 0;
 }
 
+void slirp_destroy_exec_list(struct ex_list *exec_list)
+{
+    struct ex_list *item = exec_list;
+    struct ex_list *next;
+
+    while (item) {
+        next = item->ex_next;
+        if (item->ex_pty == 0) {
+            /* free command only. */
+            g_free((void *)item->ex_exec);
+        }
+        g_free(item);
+        item = next;
+    }
+}
 
 #ifdef _WIN32