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><th>author</th><td>Efraim Flashner &lt;efraim@flashner.co.il&gt;</td><td class='right'>2016-02-02 23:17:55 +0200</td></tr>
<tr><th>committer</th><td>Efraim Flashner &lt;efraim@flashner.co.il&gt;</td><td class='right'>2016-02-02 23:23:24 +0200</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/guix/commit/nix?id=e81e5fa5070135e8b3bc2b23235a3fe092b551d2'>e81e5fa5070135e8b3bc2b23235a3fe092b551d2</a> (<a href='/guix/patch/nix?id=e81e5fa5070135e8b3bc2b23235a3fe092b551d2'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/guix/tree/?id=e81e5fa5070135e8b3bc2b23235a3fe092b551d2'>6f2d178dc52202b04e8fbe60d80ad7f2c63b55fb</a> /<a href='/guix/tree/nix?id=e81e5fa5070135e8b3bc2b23235a3fe092b551d2'>nix</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/guix/commit/nix?id=400ed6acdd275f1135aad520baa7379eb6b8cff6'>400ed6acdd275f1135aad520baa7379eb6b8cff6</a> (<a href='/guix/diff/nix?id=e81e5fa5070135e8b3bc2b23235a3fe092b551d2&amp;id2=400ed6acdd275f1135aad520baa7379eb6b8cff6'>diff</a>)</td></tr><tr><th>download</th><td colspan='2' class='oid'><a href='/guix/snapshot/guix-e81e5fa5070135e8b3bc2b23235a3fe092b551d2.tar.gz'>guix-e81e5fa5070135e8b3bc2b23235a3fe092b551d2.tar.gz</a><br/><a href='/guix/snapshot/guix-e81e5fa5070135e8b3bc2b23235a3fe092b551d2.zip'>guix-e81e5fa5070135e8b3bc2b23235a3fe092b551d2.zip</a><br/></td></tr></table>
<div class='commit-subject'>gnu: openssl: Add alternate url.</div><div class='commit-msg'>* gnu/packages/tls.scm (openssl)[source]: Add alternate url.
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