[libmicrohttpd] branch master updated: check for socket validity

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grothoff pushed a commit to branch master
in repository libmicrohttpd.

The following commit(s) were added to refs/heads/master by this push:
     new 9ebe27e1 check for socket validity
9ebe27e1 is described below

commit 9ebe27e18d0f2bd20865027d838dcacb6891d1f6
Author: Christian Grothoff <address@hidden>
AuthorDate: Sat Mar 7 17:09:22 2020 +0100

    check for socket validity
---
 src/microhttpd/mhd_sockets.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/microhttpd/mhd_sockets.c b/src/microhttpd/mhd_sockets.c
index a52d5eb5..31b53e1e 100644
--- a/src/microhttpd/mhd_sockets.c
+++ b/src/microhttpd/mhd_sockets.c
@@ -505,6 +505,11 @@ MHD_socket_cork_ (MHD_socket sock,
   const MHD_SCKT_OPT_BOOL_ on_val = 1;
 
   /* Disable extra buffering */
+  if (MHD_INVALID_SOCKET == sock)
+  {
+    errno = EBADF;
+    return 0; /* failed */
+  }
   if (0 != setsockopt (sock,
                        IPPROTO_TCP,
                        MHD_TCP_CORK_NOPUSH,

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