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| author | Jussi Kivilinna <jussi.kivilinna@mbnet.fi> | 2009-08-28 12:59:00 +0300 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2009-08-28 14:40:56 -0400 |
| commit | 5fd8f2503b0888ed0c8e0017264059a3f9dc51c0 (patch) | |
| tree | af5b0d441c535ebd1cc01b38662ddad92a9f2d1b /drivers/net/wireless/rndis_wlan.c | |
| parent | db0dd396da45502e02c64c4153c5822ab5a59a5f (diff) | |
| download | blackbird-op-linux-5fd8f2503b0888ed0c8e0017264059a3f9dc51c0.tar.gz blackbird-op-linux-5fd8f2503b0888ed0c8e0017264059a3f9dc51c0.zip | |
rndis_wlan: resize bssid list if too small
Buffer used for bssid list might be too small. Change rndis_query_oid()
to return required buffer length to caller and make rndis_check_bssid_list()
resize buffer when needed.
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/rndis_wlan.c')
| -rw-r--r-- | drivers/net/wireless/rndis_wlan.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/net/wireless/rndis_wlan.c b/drivers/net/wireless/rndis_wlan.c index 37796210db55..2309ad2214a0 100644 --- a/drivers/net/wireless/rndis_wlan.c +++ b/drivers/net/wireless/rndis_wlan.c @@ -676,7 +676,8 @@ static int rndis_query_oid(struct usbnet *dev, __le32 oid, void *data, int *len) if (ret == 0) { ret = le32_to_cpu(u.get_c->len); - *len = (*len > ret) ? ret : *len; + if (ret > *len) + *len = ret; memcpy(data, u.buf + le32_to_cpu(u.get_c->offset) + 8, *len); ret = rndis_error_status(u.get_c->status); @@ -1656,6 +1657,9 @@ static struct cfg80211_bss *rndis_bss_info_update(struct usbnet *usbdev, int ie_len, bssid_len; u8 *ie; + devdbg(usbdev, " found bssid: '%.32s' [%pM]", bssid->ssid.essid, + bssid->mac); + /* parse bssid structure */ bssid_len = le32_to_cpu(bssid->length); @@ -1695,10 +1699,12 @@ static int rndis_check_bssid_list(struct usbnet *usbdev) struct ndis_80211_bssid_list_ex *bssid_list; struct ndis_80211_bssid_ex *bssid; int ret = -EINVAL, len, count, bssid_len; + bool resized = false; devdbg(usbdev, "check_bssid_list"); len = CONTROL_BUFFER_SIZE; +resize_buf: buf = kmalloc(len, GFP_KERNEL); if (!buf) { ret = -ENOMEM; @@ -1709,11 +1715,18 @@ static int rndis_check_bssid_list(struct usbnet *usbdev) if (ret != 0) goto out; + if (!resized && len > CONTROL_BUFFER_SIZE) { + resized = true; + kfree(buf); + goto resize_buf; + } + bssid_list = buf; bssid = bssid_list->bssid; bssid_len = le32_to_cpu(bssid->length); count = le32_to_cpu(bssid_list->num_items); - devdbg(usbdev, "check_bssid_list: %d BSSIDs found", count); + devdbg(usbdev, "check_bssid_list: %d BSSIDs found (buflen: %d)", count, + len); while (count && ((void *)bssid + bssid_len) <= (buf + len)) { rndis_bss_info_update(usbdev, bssid); |
