From c6bf0ea0855a35977ba4d36c200bfa3756c2d743 Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Sun, 20 Jul 2025 01:27:10 +0900
Subject: [PATCH] test: add test case for issue #38265

(cherry picked from commit b92258eb229f84680b91e744e98d72429710770e)

Related: RHEL-103753
---
 src/libsystemd/sd-event/test-event.c | 35 ++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/src/libsystemd/sd-event/test-event.c b/src/libsystemd/sd-event/test-event.c
index 246658d024..daf2ed3ec1 100644
--- a/src/libsystemd/sd-event/test-event.c
+++ b/src/libsystemd/sd-event/test-event.c
@@ -7,6 +7,7 @@
 #include "alloc-util.h"
 #include "exec-util.h"
 #include "fd-util.h"
+#include "fileio.h"
 #include "fs-util.h"
 #include "log.h"
 #include "macro.h"
@@ -809,4 +810,38 @@ TEST(inotify_process_buffered_data) {
         assert_se(sd_event_wait(e, 0) == 0);
 }
 
+static int inotify_handler_issue_38265(sd_event_source *s, const struct inotify_event *event, void *userdata) {
+        log_debug("Inotify event: mask=0x%x name=%s", event->mask, event->name);
+        return 0;
+}
+
+TEST(inotify_issue_38265) {
+        _cleanup_(rm_rf_physical_and_freep) char *t = NULL;
+        _cleanup_(sd_event_source_unrefp) sd_event_source *a = NULL, *b = NULL;
+        _cleanup_(sd_event_unrefp) sd_event *e = NULL;
+        _cleanup_free_ char *p = NULL;
+
+        /* For issue #38265. */
+
+        ASSERT_OK(mkdtemp_malloc("/tmp/test-inotify-XXXXXX", &t));
+
+        ASSERT_OK(sd_event_default(&e));
+
+        /* Create inode data that watches IN_MODIFY */
+        ASSERT_OK(sd_event_add_inotify(e, &a, t, IN_CREATE | IN_MODIFY, inotify_handler_issue_38265, NULL));
+        ASSERT_OK(sd_event_add_inotify(e, &b, t, IN_CREATE, inotify_handler_issue_38265, NULL));
+
+        /* Then drop the event source that is interested in IN_MODIFY */
+        ASSERT_NULL(a = sd_event_source_unref(a));
+
+        /* Trigger IN_MODIFY (of course with IN_CREATE) */
+        ASSERT_NOT_NULL(p = path_join(t, "hoge"));
+        ASSERT_OK(write_string_file(p, "aaa", WRITE_STRING_FILE_CREATE));
+
+        for (unsigned i = 1; i < 5; i++) {
+                log_debug("Running event loop cycle %u to process inotify events...", i);
+                ASSERT_OK(sd_event_run(e, USEC_PER_MSEC));
+        }
+}
+
 DEFINE_TEST_MAIN(LOG_DEBUG);