From 3b5f5e0eb02ecbdcf59722755f22a9d2f88de6e6 Mon Sep 17 00:00:00 2001
From: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
Date: Tue, 25 Oct 2016 23:55:07 -0400
Subject: [PATCH] common: avoid segfault

* common/sysutils.c (gnupg_inotify_watch_socket): return EINVAL if
  socket_name is NULL, rather than segfaulting
--
Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
---
 common/sysutils.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/common/sysutils.c b/common/sysutils.c
index ab2012c45..ab3e1d6d5 100644
--- a/common/sysutils.c
+++ b/common/sysutils.c
@@ -987,6 +987,9 @@ gnupg_inotify_watch_socket (int *r_fd, const char *socket_name)
 
   *r_fd = -1;
 
+  if (!socket_name)
+    return gpg_error (GPG_ERR_EINVAL);
+
   fname = xtrystrdup (socket_name);
   if (!fname)
     return my_error_from_syserror ();