File libtirpc-clntunix_create.patch of Package libtirpc.370

commit 79bf7950d8c8bc9d323887ba0e5fa7555aa6644a
Author: Olaf Kirch <okir@suse.de>
Date:   Tue Feb 8 10:21:16 2011 +0100

    Fix a crash in clntunix_create
    
    Programs using clntunix_create would abort because glibc detected an
    attempt to free a bad pointer. It turns out that clntunix_create
    has two bugs:
    
     -	it sets up a struct netbuf to hold the sockaddr_un passed
     	into the function, but instead of copying the data, it
    	just assigns the sockaddr pointer - and eventually tries to
    	free that pointer.
    
     -	when setting up the netbuf, it uses sizeof(raddr) instead
     	of sizeof(*raddr).
    
    Instead of doing the trivial fixes, I changed the function to use
    the __rpc_set_netbuf utility function. While I was at it, I removed
    an unused local variable.
    
    Signed-off-by: Olaf Kirch <okir@suse.de>

---
 src/rpc_soc.c |   20 ++++++--------------
 1 file changed, 6 insertions(+), 14 deletions(-)

Index: libtirpc-0.2.4-rc2/src/rpc_soc.c
===================================================================
--- libtirpc-0.2.4-rc2.orig/src/rpc_soc.c
+++ libtirpc-0.2.4-rc2/src/rpc_soc.c
@@ -564,16 +564,12 @@ clntunix_create(raddr, prog, vers, sockp
 	u_int sendsz;
 	u_int recvsz;
 {
-	struct netbuf *svcaddr;
-	CLIENT *cl;
+	struct netbuf svcaddr;
+	CLIENT *cl = NULL;
 	int len;
 
-	cl = NULL;
-	svcaddr = NULL;
-	if (((svcaddr = malloc(sizeof(struct netbuf))) == NULL ) ||
-	    ((svcaddr->buf = malloc(sizeof(struct sockaddr_un))) == NULL)) {
-		if (svcaddr != NULL)
-			free(svcaddr);
+	memset(&svcaddr, 0, sizeof(svcaddr));
+	if (__rpc_set_netbuf(&svcaddr, raddr, sizeof(*raddr)) == NULL) {
 		rpc_createerr.cf_stat = RPC_SYSTEMERROR;
 		rpc_createerr.cf_error.re_errno = errno;
 		return(cl);
@@ -590,14 +586,10 @@ clntunix_create(raddr, prog, vers, sockp
 			goto done;
 		}
 	}
-	svcaddr->buf = raddr;
-	svcaddr->len = sizeof(raddr);
-	svcaddr->maxlen = sizeof (struct sockaddr_un);
-	cl = clnt_vc_create(*sockp, svcaddr, prog,
+	cl = clnt_vc_create(*sockp, &svcaddr, prog,
 	    vers, sendsz, recvsz);
 done:
-	free(svcaddr->buf);
-	free(svcaddr);
+	free(svcaddr.buf);
 	return(cl);
 }