diff options
| author | Larry Finger <Larry.Finger@lwfinger.net> | 2012-03-02 23:21:22 +0400 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2012-03-06 00:53:47 +0400 |
| commit | 48de1a17fc41613b7e9d61037fa989256d04234f (patch) | |
| tree | ae7aa10257c863880a932d78f2b7231f9404ea3d /drivers/net/wireless/rtlwifi/usb.c | |
| parent | 3abead59fcdeb56df8b83288a2f5edbe6423b0bb (diff) | |
| download | linux-48de1a17fc41613b7e9d61037fa989256d04234f.tar.xz | |
rtlwifi: Detect misread of end-point count
In the unlikely event of a misread of the USB end point count, the driver
generates a divide fault. To prevent this, add a check of the value
returned by _rtl_usb_init(). In addition, add some logging to indicate
why the condition occurred.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/rtlwifi/usb.c')
| -rw-r--r-- | drivers/net/wireless/rtlwifi/usb.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/net/wireless/rtlwifi/usb.c b/drivers/net/wireless/rtlwifi/usb.c index ffcf89fe45e4..b0eee0eb5679 100644 --- a/drivers/net/wireless/rtlwifi/usb.c +++ b/drivers/net/wireless/rtlwifi/usb.c @@ -346,9 +346,14 @@ static int _rtl_usb_init(struct ieee80211_hw *hw) pep_desc->bEndpointAddress, pep_desc->wMaxPacketSize, pep_desc->bInterval); } - if (rtlusb->in_ep_nums < rtlpriv->cfg->usb_interface_cfg->in_ep_num) - return -EINVAL ; - + if (rtlusb->in_ep_nums < rtlpriv->cfg->usb_interface_cfg->in_ep_num) { + pr_err("Too few input end points found\n"); + return -EINVAL; + } + if (rtlusb->out_ep_nums == 0) { + pr_err("No output end points found\n"); + return -EINVAL; + } /* usb endpoint mapping */ err = rtlpriv->cfg->usb_interface_cfg->usb_endpoint_mapping(hw); rtlusb->usb_mq_to_hwq = rtlpriv->cfg->usb_interface_cfg->usb_mq_to_hwq; @@ -976,6 +981,8 @@ int __devinit rtl_usb_probe(struct usb_interface *intf, } rtlpriv->cfg->ops->init_sw_leds(hw); err = _rtl_usb_init(hw); + if (err) + goto error_out; err = _rtl_usb_init_sw(hw); /* Init mac80211 sw */ err = rtl_init_core(hw); |