From 8d5557ef7da81e7f86b6f59c6348f3ef322ab37e Mon Sep 17 00:00:00 2001
From: zhaozihanzzh <zhaozihanrxh@163.com>
Date: Tue, 16 Jul 2024 21:45:54 +0800
Subject: [PATCH] Close kernel epoll fd in ff_hook_close when using
 FF_KERNEL_EVENT This commit fixes kernel fd leakage when using epoll in
 FF_KERNEL_EVENT.

---
 adapter/syscall/ff_hook_syscall.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/adapter/syscall/ff_hook_syscall.c b/adapter/syscall/ff_hook_syscall.c
index 3681d1529..57010060e 100644
--- a/adapter/syscall/ff_hook_syscall.c
+++ b/adapter/syscall/ff_hook_syscall.c
@@ -1542,6 +1542,18 @@ ff_hook_close(int fd)
 
     SYSCALL(FF_SO_CLOSE, args);
 
+#ifdef FF_KERNEL_EVENT
+    if (ret == 0 && fstack_kernel_fd_map[fd]) {
+        int kernel_fd_ret = ff_linux_close(fstack_kernel_fd_map[fd]);
+        if (kernel_fd_ret < 0) {
+            ERR_LOG("fstack_kernel_fd_map[%d]=%d, ff_linux_close returns %d, errno=%d\n",
+                fd, fstack_kernel_fd_map[fd], kernel_fd_ret, errno);
+        } else {
+            fstack_kernel_fd_map[fd] = 0;
+        }
+    }
+#endif
+
     RETURN_NOFREE();
 }