gnu: glibc@2.23: Fix CVE-2015-5180, CVE-2016-{3075,3706,4429}.

* gnu/packages/base.scm (glibc@2.23)[source]: Add patches.
* gnu/packages/patches/glibc-CVE-2016-3075.patch,
gnu/packages/patches/glibc-CVE-2016-3706.patch,
gnu/packages/patches/glibc-CVE-2016-4429.patch: New files.
* gnu/local.mk (dist_patch_DATA): Register them.

1 files changed, 58 insertions, 0 deletions

diff --git a/gnu/packages/patches/glibc-CVE-2016-4429.patch b/gnu/packages/patches/glibc-CVE-2016-4429.patch
new file mode 100644
index 0000000000..5eebd10543
--- /dev/null
+++ b/gnu/packages/patches/glibc-CVE-2016-4429.patch
@@ -0,0 +1,58 @@
+From bdce95930e1d9a7d013d1ba78740243491262879 Mon Sep 17 00:00:00 2001
+From: Florian Weimer <fweimer@redhat.com>
+Date: Mon, 23 May 2016 20:18:34 +0200
+Subject: [PATCH] CVE-2016-4429: sunrpc: Do not use alloca in clntudp_call [BZ
+ #20112]
+
+The call is technically in a loop, and under certain circumstances
+(which are quite difficult to reproduce in a test case), alloca
+can be invoked repeatedly during a single call to clntudp_call.
+As a result, the available stack space can be exhausted (even
+though individual alloca sizes are bounded implicitly by what
+can fit into a UDP packet, as a side effect of the earlier
+successful send operation).
+
+(cherry picked from commit bc779a1a5b3035133024b21e2f339fe4219fb11c)
+---
+ ChangeLog         |  7 +++++++
+ NEWS              |  4 ++++
+ sunrpc/clnt_udp.c | 10 +++++++++-
+ 3 files changed, 20 insertions(+), 1 deletion(-)
+
+diff --git a/sunrpc/clnt_udp.c b/sunrpc/clnt_udp.c
+index a6cf5f1..4d9acb1 100644
+--- a/sunrpc/clnt_udp.c
++++ b/sunrpc/clnt_udp.c
+@@ -388,9 +388,15 @@ send_again:
+ 	  struct sock_extended_err *e;
+ 	  struct sockaddr_in err_addr;
+ 	  struct iovec iov;
+-	  char *cbuf = (char *) alloca (outlen + 256);
++	  char *cbuf = malloc (outlen + 256);
+ 	  int ret;
+ 
++	  if (cbuf == NULL)
++	    {
++	      cu->cu_error.re_errno = errno;
++	      return (cu->cu_error.re_status = RPC_CANTRECV);
++	    }
++
+ 	  iov.iov_base = cbuf + 256;
+ 	  iov.iov_len = outlen;
+ 	  msg.msg_name = (void *) &err_addr;
+@@ -415,10 +421,12 @@ send_again:
+ 		 cmsg = CMSG_NXTHDR (&msg, cmsg))
+ 	      if (cmsg->cmsg_level == SOL_IP && cmsg->cmsg_type == IP_RECVERR)
+ 		{
++		  free (cbuf);
+ 		  e = (struct sock_extended_err *) CMSG_DATA(cmsg);
+ 		  cu->cu_error.re_errno = e->ee_errno;
+ 		  return (cu->cu_error.re_status = RPC_CANTRECV);
+ 		}
++	  free (cbuf);
+ 	}
+ #endif
+       do
+-- 
+2.9.3
+