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-rw-r--r--sys/rpc/rpc_generic.c8
-rw-r--r--sys/rpc/rpcb_clnt.c5
-rw-r--r--sys/rpc/rpcb_prot.c15
-rw-r--r--sys/xdr/xdr.c30
4 files changed, 46 insertions, 12 deletions
diff --git a/sys/rpc/rpc_generic.c b/sys/rpc/rpc_generic.c
index 80d658ddcf43..1b6a151b21ac 100644
--- a/sys/rpc/rpc_generic.c
+++ b/sys/rpc/rpc_generic.c
@@ -311,6 +311,8 @@ __rpc_taddr2uaddr_af(int af, const struct netbuf *nbuf)
switch (af) {
case AF_INET:
+ if (nbuf->len < sizeof(*sin))
+ return NULL;
sin = nbuf->buf;
if (inet_ntop(af, &sin->sin_addr, namebuf, sizeof namebuf)
== NULL)
@@ -323,6 +325,8 @@ __rpc_taddr2uaddr_af(int af, const struct netbuf *nbuf)
break;
#ifdef INET6
case AF_INET6:
+ if (nbuf->len < sizeof(*sin6))
+ return NULL;
sin6 = nbuf->buf;
if (inet_ntop(af, &sin6->sin6_addr, namebuf6, sizeof namebuf6)
== NULL)
@@ -366,6 +370,10 @@ __rpc_uaddr2taddr_af(int af, const char *uaddr)
port = 0;
sin = NULL;
+
+ if (uaddr == NULL)
+ return NULL;
+
addrstr = strdup(uaddr, M_RPC);
if (addrstr == NULL)
return NULL;
diff --git a/sys/rpc/rpcb_clnt.c b/sys/rpc/rpcb_clnt.c
index f3781f6ca70d..2429b3861f1a 100644
--- a/sys/rpc/rpcb_clnt.c
+++ b/sys/rpc/rpcb_clnt.c
@@ -1287,6 +1287,11 @@ xdr_netbuf(XDR *xdrs, struct netbuf *objp)
return (FALSE);
}
pp = &objp->buf;
+
+ if (objp->maxlen > RPC_MAXDATASIZE) {
+ return (FALSE);
+ }
+
dummy = xdr_bytes(xdrs, (char **) pp,
(u_int *)&(objp->len), objp->maxlen);
return (dummy);
diff --git a/sys/rpc/rpcb_prot.c b/sys/rpc/rpcb_prot.c
index f3c24089ac26..4ebbe7174f40 100644
--- a/sys/rpc/rpcb_prot.c
+++ b/sys/rpc/rpcb_prot.c
@@ -52,6 +52,7 @@ __FBSDID("$FreeBSD$");
#include <sys/malloc.h>
#include <rpc/rpc.h>
+#include <rpc/rpc_com.h>
#include <rpc/rpcb_prot.h>
bool_t
@@ -74,13 +75,13 @@ xdr_rpcb(XDR *xdrs, RPCB *objp)
if (!xdr_uint32_t(xdrs, &objp->r_vers)) {
return (FALSE);
}
- if (!xdr_string(xdrs, &objp->r_netid, (u_int)~0)) {
+ if (!xdr_string(xdrs, &objp->r_netid, RPC_MAXDATASIZE)) {
return (FALSE);
}
- if (!xdr_string(xdrs, &objp->r_addr, (u_int)~0)) {
+ if (!xdr_string(xdrs, &objp->r_addr, RPC_MAXDATASIZE)) {
return (FALSE);
}
- if (!xdr_string(xdrs, &objp->r_owner, (u_int)~0)) {
+ if (!xdr_string(xdrs, &objp->r_owner, RPC_MAXDATASIZE)) {
return (FALSE);
}
return (TRUE);
@@ -175,19 +176,19 @@ xdr_rpcblist(XDR *xdrs, RPCBLIST **rp)
bool_t
xdr_rpcb_entry(XDR *xdrs, rpcb_entry *objp)
{
- if (!xdr_string(xdrs, &objp->r_maddr, (u_int)~0)) {
+ if (!xdr_string(xdrs, &objp->r_maddr, RPC_MAXDATASIZE)) {
return (FALSE);
}
- if (!xdr_string(xdrs, &objp->r_nc_netid, (u_int)~0)) {
+ if (!xdr_string(xdrs, &objp->r_nc_netid, RPC_MAXDATASIZE)) {
return (FALSE);
}
if (!xdr_uint32_t(xdrs, &objp->r_nc_semantics)) {
return (FALSE);
}
- if (!xdr_string(xdrs, &objp->r_nc_protofmly, (u_int)~0)) {
+ if (!xdr_string(xdrs, &objp->r_nc_protofmly, RPC_MAXDATASIZE)) {
return (FALSE);
}
- if (!xdr_string(xdrs, &objp->r_nc_proto, (u_int)~0)) {
+ if (!xdr_string(xdrs, &objp->r_nc_proto, RPC_MAXDATASIZE)) {
return (FALSE);
}
return (TRUE);
diff --git a/sys/xdr/xdr.c b/sys/xdr/xdr.c
index 69d9e4a1091d..915d27bc324b 100644
--- a/sys/xdr/xdr.c
+++ b/sys/xdr/xdr.c
@@ -51,6 +51,8 @@ __FBSDID("$FreeBSD$");
#include <sys/kernel.h>
#include <sys/malloc.h>
+#include <rpc/rpc.h>
+#include <rpc/rpc_com.h>
#include <rpc/types.h>
#include <rpc/xdr.h>
@@ -62,7 +64,6 @@ typedef u_quad_t u_longlong_t; /* ANSI unsigned long long type */
*/
#define XDR_FALSE ((long) 0)
#define XDR_TRUE ((long) 1)
-#define LASTUNSIGNED ((u_int) 0-1)
/*
* for unit alignment
@@ -503,6 +504,7 @@ xdr_bytes(XDR *xdrs, char **cpp, u_int *sizep, u_int maxsize)
{
char *sp = *cpp; /* sp is the actual string pointer */
u_int nodesize;
+ bool_t ret, allocated = FALSE;
/*
* first deal with the length since xdr bytes are counted
@@ -526,6 +528,7 @@ xdr_bytes(XDR *xdrs, char **cpp, u_int *sizep, u_int maxsize)
}
if (sp == NULL) {
*cpp = sp = mem_alloc(nodesize);
+ allocated = TRUE;
}
if (sp == NULL) {
printf("xdr_bytes: out of memory");
@@ -534,7 +537,14 @@ xdr_bytes(XDR *xdrs, char **cpp, u_int *sizep, u_int maxsize)
/* FALLTHROUGH */
case XDR_ENCODE:
- return (xdr_opaque(xdrs, sp, nodesize));
+ ret = xdr_opaque(xdrs, sp, nodesize);
+ if ((xdrs->x_op == XDR_DECODE) && (ret == FALSE)) {
+ if (allocated == TRUE) {
+ mem_free(sp, nodesize);
+ *cpp = NULL;
+ }
+ }
+ return (ret);
case XDR_FREE:
if (sp != NULL) {
@@ -622,6 +632,7 @@ xdr_string(XDR *xdrs, char **cpp, u_int maxsize)
char *sp = *cpp; /* sp is the actual string pointer */
u_int size;
u_int nodesize;
+ bool_t ret, allocated = FALSE;
/*
* first deal with the length since xdr strings are counted-strings
@@ -655,8 +666,10 @@ xdr_string(XDR *xdrs, char **cpp, u_int maxsize)
if (nodesize == 0) {
return (TRUE);
}
- if (sp == NULL)
+ if (sp == NULL) {
*cpp = sp = mem_alloc(nodesize);
+ allocated = TRUE;
+ }
if (sp == NULL) {
printf("xdr_string: out of memory");
return (FALSE);
@@ -665,7 +678,14 @@ xdr_string(XDR *xdrs, char **cpp, u_int maxsize)
/* FALLTHROUGH */
case XDR_ENCODE:
- return (xdr_opaque(xdrs, sp, size));
+ ret = xdr_opaque(xdrs, sp, size);
+ if ((xdrs->x_op == XDR_DECODE) && (ret == FALSE)) {
+ if (allocated == TRUE) {
+ mem_free(sp, nodesize);
+ *cpp = NULL;
+ }
+ }
+ return (ret);
case XDR_FREE:
mem_free(sp, nodesize);
@@ -683,7 +703,7 @@ xdr_string(XDR *xdrs, char **cpp, u_int maxsize)
bool_t
xdr_wrapstring(XDR *xdrs, char **cpp)
{
- return xdr_string(xdrs, cpp, LASTUNSIGNED);
+ return xdr_string(xdrs, cpp, RPC_MAXDATASIZE);
}
/*
generated by cgit v1.3 (git 2.53.0) at 2026-10-04 17:36:54 +0000