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linux/drivers/isdn/sc/ioctl.c
Dan Carpenter 4b030d4288 isdn: fix information leak 
The main motivation of this patch changing strcpy() to strlcpy().
We strcpy() to copy a 48 byte buffers into a 49 byte buffers.  So at
best the last byte has leaked information, or maybe there is an
overflow?  Anyway, this patch closes the information leaks by zeroing
the memory and the calls to strlcpy() prevent overflows.

Signed-off-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-08-05 13:21:25 -07:00

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/*
* Copyright (C) 1996 SpellCaster Telecommunications Inc.
*
* This software may be used and distributed according to the terms
* of the GNU General Public License, incorporated herein by reference.
*
*/
#include "includes.h"
#include "hardware.h"
#include "message.h"
#include "card.h"
#include "scioc.h"
static int GetStatus(int card, boardInfo *);
/*
* Process private IOCTL messages (typically from scctrl)
*/
int sc_ioctl(int card, scs_ioctl *data)
{
int status;
RspMessage *rcvmsg;
char *spid;
char *dn;
char switchtype;
char speed;
rcvmsg = kmalloc(sizeof(RspMessage), GFP_KERNEL);
if (!rcvmsg)
return -ENOMEM;
switch(data->command) {
case SCIOCRESET: /* Perform a hard reset of the adapter */
{
pr_debug("%s: SCIOCRESET: ioctl received\n",
sc_adapter[card]->devicename);
sc_adapter[card]->StartOnReset = 0;
kfree(rcvmsg);
return reset(card);
}
case SCIOCLOAD:
{
char *srec;
srec = kmalloc(SCIOC_SRECSIZE, GFP_KERNEL);
if (!srec) {
kfree(rcvmsg);
return -ENOMEM;
}
pr_debug("%s: SCIOLOAD: ioctl received\n",
sc_adapter[card]->devicename);
if(sc_adapter[card]->EngineUp) {
pr_debug("%s: SCIOCLOAD: command failed, LoadProc while engine running.\n",
sc_adapter[card]->devicename);
kfree(rcvmsg);
kfree(srec);
return -1;
}
/*
* Get the SRec from user space
*/
if (copy_from_user(srec, data->dataptr, SCIOC_SRECSIZE)) {
kfree(rcvmsg);
kfree(srec);
return -EFAULT;
}
status = send_and_receive(card, CMPID, cmReqType2, cmReqClass0, cmReqLoadProc,
0, SCIOC_SRECSIZE, srec, rcvmsg, SAR_TIMEOUT);
kfree(rcvmsg);
kfree(srec);
if(status) {
pr_debug("%s: SCIOCLOAD: command failed, status = %d\n",
sc_adapter[card]->devicename, status);
return -1;
}
else {
pr_debug("%s: SCIOCLOAD: command successful\n",
sc_adapter[card]->devicename);
return 0;
}
}
case SCIOCSTART:
{
kfree(rcvmsg);
pr_debug("%s: SCIOSTART: ioctl received\n",
sc_adapter[card]->devicename);
if(sc_adapter[card]->EngineUp) {
pr_debug("%s: SCIOCSTART: command failed, engine already running.\n",
sc_adapter[card]->devicename);
return -1;
}
sc_adapter[card]->StartOnReset = 1;
startproc(card);
return 0;
}
case SCIOCSETSWITCH:
{
pr_debug("%s: SCIOSETSWITCH: ioctl received\n",
sc_adapter[card]->devicename);
/*
* Get the switch type from user space
*/
if (copy_from_user(&switchtype, data->dataptr, sizeof(char))) {
kfree(rcvmsg);
return -EFAULT;
}
pr_debug("%s: SCIOCSETSWITCH: setting switch type to %d\n",
sc_adapter[card]->devicename,
switchtype);
status = send_and_receive(card, CEPID, ceReqTypeCall, ceReqClass0, ceReqCallSetSwitchType,
0, sizeof(char),&switchtype, rcvmsg, SAR_TIMEOUT);
if(!status && !(rcvmsg->rsp_status)) {
pr_debug("%s: SCIOCSETSWITCH: command successful\n",
sc_adapter[card]->devicename);
kfree(rcvmsg);
return 0;
}
else {
pr_debug("%s: SCIOCSETSWITCH: command failed (status = %d)\n",
sc_adapter[card]->devicename, status);
kfree(rcvmsg);
return status;
}
}
case SCIOCGETSWITCH:
{
pr_debug("%s: SCIOGETSWITCH: ioctl received\n",
sc_adapter[card]->devicename);
/*
* Get the switch type from the board
*/
status = send_and_receive(card, CEPID, ceReqTypeCall, ceReqClass0,
ceReqCallGetSwitchType, 0, 0, NULL, rcvmsg, SAR_TIMEOUT);
if (!status && !(rcvmsg->rsp_status)) {
pr_debug("%s: SCIOCGETSWITCH: command successful\n",
sc_adapter[card]->devicename);
}
else {
pr_debug("%s: SCIOCGETSWITCH: command failed (status = %d)\n",
sc_adapter[card]->devicename, status);
kfree(rcvmsg);
return status;
}
switchtype = rcvmsg->msg_data.byte_array[0];
/*
* Package the switch type and send to user space
*/
if (copy_to_user(data->dataptr, &switchtype,
sizeof(char))) {
kfree(rcvmsg);
return -EFAULT;
}
kfree(rcvmsg);
return 0;
}
case SCIOCGETSPID:
{
pr_debug("%s: SCIOGETSPID: ioctl received\n",
sc_adapter[card]->devicename);
spid = kzalloc(SCIOC_SPIDSIZE, GFP_KERNEL);
if (!spid) {
kfree(rcvmsg);
return -ENOMEM;
}
/*
* Get the spid from the board
*/
status = send_and_receive(card, CEPID, ceReqTypeCall, ceReqClass0, ceReqCallGetSPID,
data->channel, 0, NULL, rcvmsg, SAR_TIMEOUT);
if (!status) {
pr_debug("%s: SCIOCGETSPID: command successful\n",
sc_adapter[card]->devicename);
} else {
pr_debug("%s: SCIOCGETSPID: command failed (status = %d)\n",
sc_adapter[card]->devicename, status);
kfree(spid);
kfree(rcvmsg);
return status;
}
strlcpy(spid, rcvmsg->msg_data.byte_array, SCIOC_SPIDSIZE);
/*
* Package the switch type and send to user space
*/
if (copy_to_user(data->dataptr, spid, SCIOC_SPIDSIZE)) {
kfree(spid);
kfree(rcvmsg);
return -EFAULT;
}
kfree(spid);
kfree(rcvmsg);
return 0;
}
case SCIOCSETSPID:
{
pr_debug("%s: DCBIOSETSPID: ioctl received\n",
sc_adapter[card]->devicename);
/*
* Get the spid from user space
*/
spid = memdup_user(data->dataptr, SCIOC_SPIDSIZE);
if (IS_ERR(spid)) {
kfree(rcvmsg);
return PTR_ERR(spid);
}
pr_debug("%s: SCIOCSETSPID: setting channel %d spid to %s\n",
sc_adapter[card]->devicename, data->channel, spid);
status = send_and_receive(card, CEPID, ceReqTypeCall,
ceReqClass0, ceReqCallSetSPID, data->channel,
strlen(spid), spid, rcvmsg, SAR_TIMEOUT);
if(!status && !(rcvmsg->rsp_status)) {
pr_debug("%s: SCIOCSETSPID: command successful\n",
sc_adapter[card]->devicename);
kfree(rcvmsg);
kfree(spid);
return 0;
}
else {
pr_debug("%s: SCIOCSETSPID: command failed (status = %d)\n",
sc_adapter[card]->devicename, status);
kfree(rcvmsg);
kfree(spid);
return status;
}
}
case SCIOCGETDN:
{
pr_debug("%s: SCIOGETDN: ioctl received\n",
sc_adapter[card]->devicename);
/*
* Get the dn from the board
*/
status = send_and_receive(card, CEPID, ceReqTypeCall, ceReqClass0, ceReqCallGetMyNumber,
data->channel, 0, NULL, rcvmsg, SAR_TIMEOUT);
if (!status) {
pr_debug("%s: SCIOCGETDN: command successful\n",
sc_adapter[card]->devicename);
}
else {
pr_debug("%s: SCIOCGETDN: command failed (status = %d)\n",
sc_adapter[card]->devicename, status);
kfree(rcvmsg);
return status;
}
dn = kzalloc(SCIOC_DNSIZE, GFP_KERNEL);
if (!dn) {
kfree(rcvmsg);
return -ENOMEM;
}
strlcpy(dn, rcvmsg->msg_data.byte_array, SCIOC_DNSIZE);
kfree(rcvmsg);
/*
* Package the dn and send to user space
*/
if (copy_to_user(data->dataptr, dn, SCIOC_DNSIZE)) {
kfree(dn);
return -EFAULT;
}
kfree(dn);
return 0;
}
case SCIOCSETDN:
{
pr_debug("%s: SCIOSETDN: ioctl received\n",
sc_adapter[card]->devicename);
/*
* Get the spid from user space
*/
dn = memdup_user(data->dataptr, SCIOC_DNSIZE);
if (IS_ERR(dn)) {
kfree(rcvmsg);
return PTR_ERR(dn);
}
pr_debug("%s: SCIOCSETDN: setting channel %d dn to %s\n",
sc_adapter[card]->devicename, data->channel, dn);
status = send_and_receive(card, CEPID, ceReqTypeCall,
ceReqClass0, ceReqCallSetMyNumber, data->channel,
strlen(dn),dn,rcvmsg, SAR_TIMEOUT);
if(!status && !(rcvmsg->rsp_status)) {
pr_debug("%s: SCIOCSETDN: command successful\n",
sc_adapter[card]->devicename);
kfree(rcvmsg);
kfree(dn);
return 0;
}
else {
pr_debug("%s: SCIOCSETDN: command failed (status = %d)\n",
sc_adapter[card]->devicename, status);
kfree(rcvmsg);
kfree(dn);
return status;
}
}
case SCIOCTRACE:
pr_debug("%s: SCIOTRACE: ioctl received\n",
sc_adapter[card]->devicename);
/* sc_adapter[card]->trace = !sc_adapter[card]->trace;
pr_debug("%s: SCIOCTRACE: tracing turned %s\n",
sc_adapter[card]->devicename,
sc_adapter[card]->trace ? "ON" : "OFF"); */
break;
case SCIOCSTAT:
{
boardInfo *bi;
pr_debug("%s: SCIOSTAT: ioctl received\n",
sc_adapter[card]->devicename);
bi = kzalloc(sizeof(boardInfo), GFP_KERNEL);
if (!bi) {
kfree(rcvmsg);
return -ENOMEM;
}
kfree(rcvmsg);
GetStatus(card, bi);
if (copy_to_user(data->dataptr, bi, sizeof(boardInfo))) {
kfree(bi);
return -EFAULT;
}
kfree(bi);
return 0;
}
case SCIOCGETSPEED:
{
pr_debug("%s: SCIOGETSPEED: ioctl received\n",
sc_adapter[card]->devicename);
/*
* Get the speed from the board
*/
status = send_and_receive(card, CEPID, ceReqTypeCall, ceReqClass0,
ceReqCallGetCallType, data->channel, 0, NULL, rcvmsg, SAR_TIMEOUT);
if (!status && !(rcvmsg->rsp_status)) {
pr_debug("%s: SCIOCGETSPEED: command successful\n",
sc_adapter[card]->devicename);
}
else {
pr_debug("%s: SCIOCGETSPEED: command failed (status = %d)\n",
sc_adapter[card]->devicename, status);
kfree(rcvmsg);
return status;
}
speed = rcvmsg->msg_data.byte_array[0];
kfree(rcvmsg);
/*
* Package the switch type and send to user space
*/
if (copy_to_user(data->dataptr, &speed, sizeof(char)))
return -EFAULT;
return 0;
}
case SCIOCSETSPEED:
pr_debug("%s: SCIOCSETSPEED: ioctl received\n",
sc_adapter[card]->devicename);
break;
case SCIOCLOOPTST:
pr_debug("%s: SCIOCLOOPTST: ioctl received\n",
sc_adapter[card]->devicename);
break;
default:
kfree(rcvmsg);
return -1;
}
kfree(rcvmsg);
return 0;
}
static int GetStatus(int card, boardInfo *bi)
{
RspMessage rcvmsg;
int i, status;
/*
* Fill in some of the basic info about the board
*/
bi->modelid = sc_adapter[card]->model;
strcpy(bi->serial_no, sc_adapter[card]->hwconfig.serial_no);
strcpy(bi->part_no, sc_adapter[card]->hwconfig.part_no);
bi->iobase = sc_adapter[card]->iobase;
bi->rambase = sc_adapter[card]->rambase;
bi->irq = sc_adapter[card]->interrupt;
bi->ramsize = sc_adapter[card]->hwconfig.ram_size;
bi->interface = sc_adapter[card]->hwconfig.st_u_sense;
strcpy(bi->load_ver, sc_adapter[card]->load_ver);
strcpy(bi->proc_ver, sc_adapter[card]->proc_ver);
/*
* Get the current PhyStats and LnkStats
*/
status = send_and_receive(card, CEPID, ceReqTypePhy, ceReqClass2,
ceReqPhyStatus, 0, 0, NULL, &rcvmsg, SAR_TIMEOUT);
if(!status) {
if(sc_adapter[card]->model < PRI_BOARD) {
bi->l1_status = rcvmsg.msg_data.byte_array[2];
for(i = 0 ; i < BRI_CHANNELS ; i++)
bi->status.bristats[i].phy_stat =
rcvmsg.msg_data.byte_array[i];
}
else {
bi->l1_status = rcvmsg.msg_data.byte_array[0];
bi->l2_status = rcvmsg.msg_data.byte_array[1];
for(i = 0 ; i < PRI_CHANNELS ; i++)
bi->status.pristats[i].phy_stat =
rcvmsg.msg_data.byte_array[i+2];
}
}
/*
* Get the call types for each channel
*/
for (i = 0 ; i < sc_adapter[card]->nChannels ; i++) {
status = send_and_receive(card, CEPID, ceReqTypeCall, ceReqClass0,
ceReqCallGetCallType, 0, 0, NULL, &rcvmsg, SAR_TIMEOUT);
if(!status) {
if (sc_adapter[card]->model == PRI_BOARD) {
bi->status.pristats[i].call_type =
rcvmsg.msg_data.byte_array[0];
}
else {
bi->status.bristats[i].call_type =
rcvmsg.msg_data.byte_array[0];
}
}
}
/*
* If PRI, get the call states and service states for each channel
*/
if (sc_adapter[card]->model == PRI_BOARD) {
/*
* Get the call states
*/
status = send_and_receive(card, CEPID, ceReqTypeStat, ceReqClass2,
ceReqPhyChCallState, 0, 0, NULL, &rcvmsg, SAR_TIMEOUT);
if(!status) {
for( i = 0 ; i < PRI_CHANNELS ; i++ )
bi->status.pristats[i].call_state =
rcvmsg.msg_data.byte_array[i];
}
/*
* Get the service states
*/
status = send_and_receive(card, CEPID, ceReqTypeStat, ceReqClass2,
ceReqPhyChServState, 0, 0, NULL, &rcvmsg, SAR_TIMEOUT);
if(!status) {
for( i = 0 ; i < PRI_CHANNELS ; i++ )
bi->status.pristats[i].serv_state =
rcvmsg.msg_data.byte_array[i];
}
/*
* Get the link stats for the channels
*/
for (i = 1 ; i <= PRI_CHANNELS ; i++) {
status = send_and_receive(card, CEPID, ceReqTypeLnk, ceReqClass0,
ceReqLnkGetStats, i, 0, NULL, &rcvmsg, SAR_TIMEOUT);
if (!status) {
bi->status.pristats[i-1].link_stats.tx_good =
(unsigned long)rcvmsg.msg_data.byte_array[0];
bi->status.pristats[i-1].link_stats.tx_bad =
(unsigned long)rcvmsg.msg_data.byte_array[4];
bi->status.pristats[i-1].link_stats.rx_good =
(unsigned long)rcvmsg.msg_data.byte_array[8];
bi->status.pristats[i-1].link_stats.rx_bad =
(unsigned long)rcvmsg.msg_data.byte_array[12];
}
}
/*
* Link stats for the D channel
*/
status = send_and_receive(card, CEPID, ceReqTypeLnk, ceReqClass0,
ceReqLnkGetStats, 0, 0, NULL, &rcvmsg, SAR_TIMEOUT);
if (!status) {
bi->dch_stats.tx_good = (unsigned long)rcvmsg.msg_data.byte_array[0];
bi->dch_stats.tx_bad = (unsigned long)rcvmsg.msg_data.byte_array[4];
bi->dch_stats.rx_good = (unsigned long)rcvmsg.msg_data.byte_array[8];
bi->dch_stats.rx_bad = (unsigned long)rcvmsg.msg_data.byte_array[12];
}
return 0;
}
/*
* If BRI or POTS, Get SPID, DN and call types for each channel
*/
/*
* Get the link stats for the channels
*/
status = send_and_receive(card, CEPID, ceReqTypeLnk, ceReqClass0,
ceReqLnkGetStats, 0, 0, NULL, &rcvmsg, SAR_TIMEOUT);
if (!status) {
bi->dch_stats.tx_good = (unsigned long)rcvmsg.msg_data.byte_array[0];
bi->dch_stats.tx_bad = (unsigned long)rcvmsg.msg_data.byte_array[4];
bi->dch_stats.rx_good = (unsigned long)rcvmsg.msg_data.byte_array[8];
bi->dch_stats.rx_bad = (unsigned long)rcvmsg.msg_data.byte_array[12];
bi->status.bristats[0].link_stats.tx_good =
(unsigned long)rcvmsg.msg_data.byte_array[16];
bi->status.bristats[0].link_stats.tx_bad =
(unsigned long)rcvmsg.msg_data.byte_array[20];
bi->status.bristats[0].link_stats.rx_good =
(unsigned long)rcvmsg.msg_data.byte_array[24];
bi->status.bristats[0].link_stats.rx_bad =
(unsigned long)rcvmsg.msg_data.byte_array[28];
bi->status.bristats[1].link_stats.tx_good =
(unsigned long)rcvmsg.msg_data.byte_array[32];
bi->status.bristats[1].link_stats.tx_bad =
(unsigned long)rcvmsg.msg_data.byte_array[36];
bi->status.bristats[1].link_stats.rx_good =
(unsigned long)rcvmsg.msg_data.byte_array[40];
bi->status.bristats[1].link_stats.rx_bad =
(unsigned long)rcvmsg.msg_data.byte_array[44];
}
/*
* Get the SPIDs
*/
for (i = 0 ; i < BRI_CHANNELS ; i++) {
status = send_and_receive(card, CEPID, ceReqTypeCall, ceReqClass0,
ceReqCallGetSPID, i+1, 0, NULL, &rcvmsg, SAR_TIMEOUT);
if (!status)
strcpy(bi->status.bristats[i].spid, rcvmsg.msg_data.byte_array);
}
/*
* Get the DNs
*/
for (i = 0 ; i < BRI_CHANNELS ; i++) {
status = send_and_receive(card, CEPID, ceReqTypeCall, ceReqClass0,
ceReqCallGetMyNumber, i+1, 0, NULL, &rcvmsg, SAR_TIMEOUT);
if (!status)
strcpy(bi->status.bristats[i].dn, rcvmsg.msg_data.byte_array);
}
return 0;
}
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