Fix CVE-2017-8779:

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-8779

Patch copied from the bug reporter's 3rd-party repository:

https://github.com/guidovranken/rpcbomb/blob/master/rpcbind_patch.txt

diff --git a/src/rpcb_svc_com.c b/src/rpcb_svc_com.c
index 5862c26..e11f61b 100644
--- a/src/rpcb_svc_com.c
+++ b/src/rpcb_svc_com.c
@@ -48,6 +48,7 @@
 #include <rpc/rpc.h>
 #include <rpc/rpcb_prot.h>
 #include <rpc/svc_dg.h>
+#include <rpc/rpc_com.h>
 #include <netconfig.h>
 #include <errno.h>
 #include <syslog.h>
@@ -432,7 +433,7 @@ rpcbproc_taddr2uaddr_com(void *arg, struct svc_req *rqstp /*__unused*/,
 static bool_t
 xdr_encap_parms(XDR *xdrs, struct encap_parms *epp)
 {
-	return (xdr_bytes(xdrs, &(epp->args), (u_int *) &(epp->arglen), ~0));
+	return (xdr_bytes(xdrs, &(epp->args), (u_int *) &(epp->arglen), RPC_MAXDATASIZE));
 }
 
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<tr><td><span title='2020-11-05 16:42:38 +0100'>2020-11-05</span></td><td><a href='/guix/commit/po/doc/guix-manual.ru.po?id=eff2cabdde1077928868d06ac197f03f114f03fe'>nls: Update translations of the manual.</a></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2020-10-29 20:19:05 +0100'>2020-10-29</span></td><td><a href='/guix/commit/po/doc/guix-manual.ru.po?id=759774bc69e91c9db6f5070b75d5a5fe9b36c04b'>nls: Update 'ru' translation of the manual.</a></td><td>Julien Lepiller</td></tr>
<tr><td><span title='2020-05-05 23:45:56 +0200'>2020-05-05</span></td><td><a href='/guix/commit/po/doc/guix-manual.ru.po?id=0701274446bbd39b053a0c65947fd7f1319f7bf6'>nls: Update.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-04-12 00:18:05 +0200'>2020-04-12</span></td><td><a href='/guix/commit/po/doc/guix-manual.ru.po?id=935ef44b398353b5b6af94e185d7b0c3d833db0b'>nls: Update.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-03-23 00:06:58 +0100'>2020-03-23</span></td><td><a href='/guix/commit/po/doc/guix-manual.ru.po?id=86603d8660e42a3b5d8b407e456a98429943bc7e'>nls: Update.</a></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-05-13 10:46:03 +0200'>2019-05-13</span></td><td><a href='/guix/commit/po/doc/guix-manual.ru.po?id=3bac7e6495934de9913e6186d954d1331883e064'>doc: Add Russian translation.</a><span class='msg-avail'>...<span class='msg-tooltip'>* doc/local.mk (info_TEXINFOS): Add guix.ru.texi.
(TRANSLATED_INFO): Add {guix,contributing}.ru.texi.
* po/doc/local.mk (DOC_PO_FILES): Add guix-manual.ru.po.
* po/doc/guix-manual.ru.po: New file.
</span></span></td><td>Ludovic Courtès</td></tr>