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staging: vt6655: fix direct dereferencing of user pointer

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Sparse reported that the data from tagSCmdRequest is given by
userspace, so it should be tagged as such.

Later, we were memcomparing and dereferencing it without first copying
it, fix that as well.

Signed-off-by: Guillaume Clement <gclement@baobob.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Guillaume Clement 2014-07-25 14:47:23 +02:00 committed by Greg Kroah-Hartman
parent 80dd705208
commit 53cbe20d02
3 changed files with 26 additions and 14 deletions
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2
drivers/staging/vt6655/iocmd.h
View File

@ -94,7 +94,7 @@ typedef enum tagWZONETYPE {
#pragma pack(1)
typedef struct tagSCmdRequest {
u8 name[16];
void *data;
void __user *data;
u16 wResult;
u16 wCmdCode;
} SCmdRequest, *PSCmdRequest;

32
drivers/staging/vt6655/iwctl.c
View File

@ -1621,17 +1621,24 @@ int iwctl_giwauth(struct net_device *dev,
int iwctl_siwgenie(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *wrq,
char *extra)
char __user *extra)
{
PSDevice pDevice = (PSDevice)netdev_priv(dev);
PSMgmtObject pMgmt = &(pDevice->sMgmtObj);
int ret = 0;
char length;
if (wrq->length) {
if ((wrq->length < 2) || (extra[1]+2 != wrq->length)) {
ret = -EINVAL;
goto out;
}
if (wrq->length < 2)
return -EINVAL;
ret = get_user(length, extra + 1);
if (ret)
return ret;
if (length + 2 != wrq->length)
return -EINVAL;
if (wrq->length > MAX_WPA_IE_LEN) {
ret = -ENOMEM;
goto out;
@ -1654,7 +1661,7 @@ out://not completely ...not necessary in wpa_supplicant 0.5.8
int iwctl_giwgenie(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *wrq,
char *extra)
char __user *extra)
{
PSDevice pDevice = (PSDevice)netdev_priv(dev);
PSMgmtObject pMgmt = &(pDevice->sMgmtObj);
@ -1801,18 +1808,23 @@ int iwctl_giwencodeext(struct net_device *dev,
int iwctl_siwmlme(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *wrq,
char *extra)
char __user *extra)
{
PSDevice pDevice = (PSDevice)netdev_priv(dev);
PSMgmtObject pMgmt = &(pDevice->sMgmtObj);
struct iw_mlme *mlme = (struct iw_mlme *)extra;
struct iw_mlme mime;
int ret = 0;
if (memcmp(pMgmt->abyCurrBSSID, mlme->addr.sa_data, ETH_ALEN)) {
ret = copy_from_user(&mime, extra, sizeof(mime));
if (ret)
return -EFAULT;
if (memcmp(pMgmt->abyCurrBSSID, mime.addr.sa_data, ETH_ALEN)) {
ret = -EINVAL;
return ret;
}
switch (mlme->cmd) {
switch (mime.cmd) {
case IW_MLME_DEAUTH:
//this command seems to be not complete,please test it --einsnliu
//bScheduleCommand((void *) pDevice, WLAN_CMD_DEAUTH, (unsigned char *)&reason);

6
drivers/staging/vt6655/iwctl.h
View File

@ -176,12 +176,12 @@ int iwctl_giwauth(struct net_device *dev,
int iwctl_siwgenie(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *wrq,
char *extra);
char __user *extra);
int iwctl_giwgenie(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *wrq,
char *extra);
char __user *extra);
int iwctl_siwencodeext(struct net_device *dev,
struct iw_request_info *info,
@ -196,7 +196,7 @@ int iwctl_giwencodeext(struct net_device *dev,
int iwctl_siwmlme(struct net_device *dev,
struct iw_request_info *info,
struct iw_point *wrq,
char *extra);
char __user *extra);
#endif // #ifdef WPA_SUPPLICANT_DRIVER_WEXT_SUPPORT
//End Add -- //2008-0409-07, <Add> by Einsn Liu