From 5c448452cfd78fdc8d5c3562f37f0676bfacdf20 Mon Sep 17 00:00:00 2001
From: Norihiro Kamae <norihiro@nagater.net>
Date: Mon, 31 Mar 2025 21:25:04 +0900
Subject: [PATCH] libobs/util: Prevent locking mutex in child process when
 checking Qt5

The frontend has set a log handler which locks the mutex in `LogString`.
If `os_dlopen` fails in the child process, it calls `blog` and attempted
to lock the mutex that may have already been locked by another thread
before `fork()`. This change prevents the child process from locking the
mutex, resolving the potential deadlock.
---
 libobs/util/platform-nix.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libobs/util/platform-nix.c b/libobs/util/platform-nix.c
index 6951df7a0..84e929fed 100644
--- a/libobs/util/platform-nix.c
+++ b/libobs/util/platform-nix.c
@@ -134,6 +134,7 @@ bool has_qt5_dependency(const char *path)
 {
 	pid_t pid = fork();
 	if (pid == 0) {
+		base_set_log_handler(NULL, NULL);
 		_exit(module_has_qt5_check(path));
 	}
 	if (pid < 0) {