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sunrpc: Const-ify all instances of struct rpc_xprt_ops

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After transport instance creation, these function pointers never
change. Mark them as constant to prevent their use as an attack
vector for code injections.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever 2017-08-01 12:00:39 -04:00 committed by Anna Schumaker
parent 16f73eb02d
commit d31ae25481
4 changed files with 8 additions and 8 deletions
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2
include/linux/sunrpc/xprt.h
View File

@ -174,7 +174,7 @@ enum xprt_transports {
struct rpc_xprt {
struct kref kref; /* Reference count */
struct rpc_xprt_ops * ops; /* transport methods */
const struct rpc_xprt_ops *ops; /* transport methods */
const struct rpc_timeout *timeout; /* timeout parms */
struct sockaddr_storage addr; /* server address */

2
net/sunrpc/xprtrdma/svc_rdma_backchannel.c
View File

@ -266,7 +266,7 @@ xprt_rdma_bc_put(struct rpc_xprt *xprt)
module_put(THIS_MODULE);
}
static struct rpc_xprt_ops xprt_rdma_bc_procs = {
static const struct rpc_xprt_ops xprt_rdma_bc_procs = {
.reserve_xprt = xprt_reserve_xprt_cong,
.release_xprt = xprt_release_xprt_cong,
.alloc_slot = xprt_alloc_slot,

4
net/sunrpc/xprtrdma/transport.c
View File

@ -149,7 +149,7 @@ static struct ctl_table sunrpc_table[] = {
#endif
static struct rpc_xprt_ops xprt_rdma_procs; /*forward reference */
static const struct rpc_xprt_ops xprt_rdma_procs;
static void
xprt_rdma_format_addresses4(struct rpc_xprt *xprt, struct sockaddr *sap)
@ -811,7 +811,7 @@ xprt_rdma_disable_swap(struct rpc_xprt *xprt)
* Plumbing for rpc transport switch and kernel module
*/
static struct rpc_xprt_ops xprt_rdma_procs = {
static const struct rpc_xprt_ops xprt_rdma_procs = {
.reserve_xprt = xprt_reserve_xprt_cong,
.release_xprt = xprt_release_xprt_cong, /* sunrpc/xprt.c */
.alloc_slot = xprt_alloc_slot,

8
net/sunrpc/xprtsock.c
View File

@ -2724,7 +2724,7 @@ static void bc_destroy(struct rpc_xprt *xprt)
module_put(THIS_MODULE);
}
static struct rpc_xprt_ops xs_local_ops = {
static const struct rpc_xprt_ops xs_local_ops = {
.reserve_xprt = xprt_reserve_xprt,
.release_xprt = xs_tcp_release_xprt,
.alloc_slot = xprt_alloc_slot,
@ -2742,7 +2742,7 @@ static struct rpc_xprt_ops xs_local_ops = {
.disable_swap = xs_disable_swap,
};
static struct rpc_xprt_ops xs_udp_ops = {
static const struct rpc_xprt_ops xs_udp_ops = {
.set_buffer_size = xs_udp_set_buffer_size,
.reserve_xprt = xprt_reserve_xprt_cong,
.release_xprt = xprt_release_xprt_cong,
@ -2764,7 +2764,7 @@ static struct rpc_xprt_ops xs_udp_ops = {
.inject_disconnect = xs_inject_disconnect,
};
static struct rpc_xprt_ops xs_tcp_ops = {
static const struct rpc_xprt_ops xs_tcp_ops = {
.reserve_xprt = xprt_reserve_xprt,
.release_xprt = xs_tcp_release_xprt,
.alloc_slot = xprt_lock_and_alloc_slot,
@ -2795,7 +2795,7 @@ static struct rpc_xprt_ops xs_tcp_ops = {
* The rpc_xprt_ops for the server backchannel
*/
static struct rpc_xprt_ops bc_tcp_ops = {
static const struct rpc_xprt_ops bc_tcp_ops = {
.reserve_xprt = xprt_reserve_xprt,
.release_xprt = xprt_release_xprt,
.alloc_slot = xprt_alloc_slot,