udev: event - explicitly don't read() from invalid fd

This fixes CID #1237641.

diff --git a/src/udev/udev-event.c b/src/udev/udev-event.c
index 6b8b5a8efa99ec9423bbdfd7ff947c0c987510f3..c8b142077e4432ed4c01a10fc8f730c2efbabccb 100644 (file)
--- a/src/udev/udev-event.c
+++ b/src/udev/udev-event.c
@@ -494,6 +494,9 @@ static void spawn_read(struct udev_event *event,
                 for (i = 0; i < fdcount; i++) {
                         int *fd = (int *)ev[i].data.ptr;
 
+                        if (*fd < 0)
+                                continue;
+
                         if (ev[i].events & EPOLLIN) {
                                 ssize_t count;
                                 char buf[4096];