From: Tom Gundersen <teg@jklm.no>
Date: Wed, 17 Sep 2014 19:44:56 +0000 (+0200)
Subject: udev: event - explicitly don't read() from invalid fd
X-Git-Tag: v217~538
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=3f796750b192e62701e91a95f85389f876d1059b;p=elogind.git

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 6b8b5a8ef..c8b142077 100644
--- 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];