From 80e2b4e4d92badc9b4599d84f2d0f7eb9a305b46 Mon Sep 17 00:00:00 2001
From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Fri, 17 Apr 2026 18:49:12 +1000
Subject: [PATCH] util: close excessive file descriptors in iobuf_recv_from_fd

Unceremoneously close any fds that the client gives us that exceed our
expectations (which right now is a max of 32 for a protocol-valid max
of... 1).

Assisted-by: Claude:claude-opus-4-6
Part-of: <https://gitlab.freedesktop.org/libinput/libei/-/merge_requests/388>
---
 src/util-io.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/util-io.c b/src/util-io.c
index acc35f0..3315ab6 100644
--- a/src/util-io.c
+++ b/src/util-io.c
@@ -390,6 +390,12 @@ iobuf_recv_from_fd(struct iobuf *buf, int fd)
 					fd++;
 				}
 			}
+			/* Close any remaining fds that didn't fit in the buffer
+			 * to prevent fd leaks */
+			while (*fd != -1) {
+				xclose(*fd);
+				fd++;
+			}
 		}
 
 		nread += rc;