SOURCES/0001-Automatically-disable-inet6-transport-if-ipv6-is-dis.patch

@@ -0,0 +1,113 @@
+From 8302f576f8b41f9aa95b091a9ef001ab5ddc2ef5 Mon Sep 17 00:00:00 2001
+From: Ray Strode <rstrode@redhat.com>
+Date: Fri, 6 May 2022 14:23:59 -0400
+Subject: [PATCH] Automatically disable inet6 transport if ipv6 is disabled on
+ machine
+
+If a machine is booted with ipv6.disable=1, trying to bind to an
+AF_INET6 socket will fail with AFNOSUPPORT.
+
+The tcp transport automatically falls back to ipv4 in this case, but
+the more specific inet6 transport just fails.
+
+This failure leads to MakeAllCOTSServerListeners returning a partial
+success.
+
+Unfortunately, the X server can't really contiue with partial successes
+from this function if -displayfd is in use, since that would, in other
+cases, potentially lead to the -displayfd electing a display number that
+is potentially partially in use by a rogue program.
+
+This commit addresses the issue by automatically disabling transports
+when they fail with AFNOSUPPORT, leading them to get ignored, rather than
+proceeding and ultimately returning from MakeAllCOTSServerListerns with
+partial=TRUE.
+---
+ Xtranssock.c | 15 +++++++++++----
+ 1 file changed, 11 insertions(+), 4 deletions(-)
+
+diff --git a/Xtranssock.c b/Xtranssock.c
+index 632c1b5..2c80a5c 100644
+--- a/Xtranssock.c
++++ b/Xtranssock.c
+@@ -584,66 +584,73 @@ TRANS(SocketOpenCOTSClient) (Xtransport *thistrans, const char *protocol,
+ 			     const char *host, const char *port)
+ {
+     return TRANS(SocketOpenCOTSClientBase)(
+ 			thistrans->TransName, protocol, host, port, -1);
+ }
+ 
+ 
+ #endif /* TRANS_CLIENT */
+ 
+ 
+ #ifdef TRANS_SERVER
+ 
+ static XtransConnInfo
+ TRANS(SocketOpenCOTSServer) (Xtransport *thistrans, const char *protocol,
+ 			     const char *host, const char *port)
+ 
+ {
+     XtransConnInfo	ciptr;
+     int	i = -1;
+ 
+     prmsg (2,"SocketOpenCOTSServer(%s,%s,%s)\n", protocol, host, port);
+ 
+     SocketInitOnce();
+ 
+     while ((i = TRANS(SocketSelectFamily) (i, thistrans->TransName)) >= 0) {
+ 	if ((ciptr = TRANS(SocketOpen) (
+ 		 i, Sockettrans2devtab[i].devcotsname)) != NULL)
+ 	    break;
+     }
+     if (i < 0) {
+-	if (i == -1)
+-	    prmsg (1,"SocketOpenCOTSServer: Unable to open socket for %s\n",
+-		   thistrans->TransName);
+-	else
++	if (i == -1) {
++		if (errno == EAFNOSUPPORT) {
++			thistrans->flags |= TRANS_NOLISTEN;
++			prmsg (1,"SocketOpenCOTSServer: Socket for %s unsupported on this system.\n",
++			       thistrans->TransName);
++		} else {
++			prmsg (1,"SocketOpenCOTSServer: Unable to open socket for %s\n",
++			       thistrans->TransName);
++		}
++	} else {
+ 	    prmsg (1,"SocketOpenCOTSServer: Unable to determine socket type for %s\n",
+ 		   thistrans->TransName);
++	}
+ 	return NULL;
+     }
+ 
+     /*
+      * Using this prevents the bind() check for an existing server listening
+      * on the same port, but it is required for other reasons.
+      */
+ #ifdef SO_REUSEADDR
+ 
+     /*
+      * SO_REUSEADDR only applied to AF_INET && AF_INET6
+      */
+ 
+     if (Sockettrans2devtab[i].family == AF_INET
+ #if defined(IPv6) && defined(AF_INET6)
+       || Sockettrans2devtab[i].family == AF_INET6
+ #endif
+     )
+     {
+ 	int one = 1;
+ 	setsockopt (ciptr->fd, SOL_SOCKET, SO_REUSEADDR,
+ 		    (char *) &one, sizeof (int));
+     }
+ #endif
+ #ifdef IPV6_V6ONLY
+     if (Sockettrans2devtab[i].family == AF_INET6)
+     {
+ 	int one = 1;
+ 	setsockopt(ciptr->fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(int));
+     }
+-- 
+2.35.1
+

SPECS/xorg-x11-xtrans-devel.spec

@@ -8,7 +8,7 @@
 Summary: X.Org X11 developmental X transport library
 Name: xorg-x11-xtrans-devel
 Version: 1.4.0
-Release: 1%{?dist}
+Release: 4%{?dist}
 License: MIT
 Group: System Environment/Libraries
 URL: http://www.x.org
@@ -19,6 +19,9 @@ Source0: https://xorg.freedesktop.org/archive/individual/lib/xtrans-%{version}.t
 # Fedora specific patch
 Patch1: xtrans-1.0.3-avoid-gethostname.patch
 
+Patch2: 0001-Automatically-disable-inet6-transport-if-ipv6-is-dis.patch
+
+BuildRequires: git
 BuildRequires: pkgconfig
 BuildRequires: xorg-x11-util-macros
 
@@ -26,8 +29,7 @@ BuildRequires: xorg-x11-util-macros
 X.Org X11 developmental X transport library
 
 %prep
-%setup -q -n xtrans-%{version}
-%patch1 -p1 -b .my-name-is-unix
+%autosetup -S git -n xtrans-%{version}
 
 %build
 # yes, this looks horrible, but it's to get the .pc file in datadir
@@ -53,6 +55,14 @@ install -pm 644 AUTHORS ChangeLog COPYING README.md $RPM_BUILD_ROOT%{_pkgdocdir}
 %{_datadir}/pkgconfig/xtrans.pc
 
 %changelog
+* Thu Jun 09 2022 Ray Strode <rstrode@redhat.com> - 1.4.0-4
+- Actually apply the ipv6.disable support
+  Related: #2075132
+
+* Fri May 06 2022 Ray Strode <rstrode@redhat.com> - 1.4.0-2
+- Support ipv6.disable=1
+  Related: #2075132
+
 * Tue Jun 02 2020 Adam Jackson <ajax@redhat.com> - 1.4.0-1
 - xtrans 1.4.0