[PATCH 5.18 867/879] staging: r8188eu: delete rtw_wx_read/write32()

Greg Kroah-Hartman
2022-06-08T01:10:03Z

From: Dan Carpenter <dan.carpenter@oracle.com>

commit 4d0cc9e0e53e9946d7b8dc58279c62dfa7a2191b upstream.

These debugging tools let you call:

status = usb_control_msg_recv/send(udev, 0, REALTEK_USB_VENQT_CMD_REQ,
REALTEK_USB_VENQT_READ/WRITE, value,
REALTEK_USB_VENQT_CMD_IDX, io_buf,
size, RTW_USB_CONTROL_MSG_TIMEOUT,
GFP_KERNEL);

with a user controlled "value" in the 0-0xffff range. It's not a valid
API.

Fixes: 2b42bd58b321 ("staging: r8188eu: introduce new os_dep dir for RTL8188eu driver")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/YoXS4OaD1oauPvmj@kili
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/staging/r8188eu/os_dep/ioctl_linux.c | 86 ---------------------------
1 file changed, 2 insertions(+), 84 deletions(-)

--- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c
+++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c
@@ -1888,88 +1888,6 @@ static int rtw_wx_get_nick(struct net_de
return 0;
}

-static int rtw_wx_read32(struct net_device *dev,
- struct iw_request_info *info,
- union iwreq_data *wrqu, char *extra)
-{
- struct adapter *padapter;
- struct iw_point *p;
- u16 len;
- u32 addr;
- u32 data32;
- u32 bytes;
- u8 *ptmp;
- int ret;
-
- padapter = (struct adapter *)rtw_netdev_priv(dev);
- p = &wrqu->data;
- len = p->length;
- ptmp = memdup_user(p->pointer, len);
- if (IS_ERR(ptmp))
- return PTR_ERR(ptmp);
-
- bytes = 0;
- addr = 0;
- sscanf(ptmp, "%d,%x", &bytes, &addr);
-
- switch (bytes) {
- case 1:
- data32 = rtw_read8(padapter, addr);
- sprintf(extra, "0x%02X", data32);
- break;
- case 2:
- data32 = rtw_read16(padapter, addr);
- sprintf(extra, "0x%04X", data32);
- break;
- case 4:
- data32 = rtw_read32(padapter, addr);
- sprintf(extra, "0x%08X", data32);
- break;
- default:
- ret = -EINVAL;
- goto err_free_ptmp;
- }
-
- kfree(ptmp);
- return 0;
-
-err_free_ptmp:
- kfree(ptmp);
- return ret;
-}
-
-static int rtw_wx_write32(struct net_device *dev,
- struct iw_request_info *info,
- union iwreq_data *wrqu, char *extra)
-{
- struct adapter *padapter = (struct adapter *)rtw_netdev_priv(dev);
-
- u32 addr;
- u32 data32;
- u32 bytes;
-
- bytes = 0;
- addr = 0;
- data32 = 0;
- sscanf(extra, "%d,%x,%x", &bytes, &addr, &data32);
-
- switch (bytes) {
- case 1:
- rtw_write8(padapter, addr, (u8)data32);
- break;
- case 2:
- rtw_write16(padapter, addr, (u16)data32);
- break;
- case 4:
- rtw_write32(padapter, addr, data32);
- break;
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
static int rtw_wx_read_rf(struct net_device *dev,
struct iw_request_info *info,
union iwreq_data *wrqu, char *extra)
@@ -3897,8 +3815,8 @@ static const struct iw_priv_args rtw_pri
};

static iw_handler rtw_private_handler[] = {
-rtw_wx_write32, /* 0x00 */
-rtw_wx_read32, /* 0x01 */
+ NULL, /* 0x00 */
+ NULL, /* 0x01 */
NULL, /* 0x02 */
NULL, /* 0x03 */
/* for MM DTV platform */