diff options
| author | Adam Baker <linux@baker-net.org.uk> | 2008-02-03 15:46:24 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2008-02-29 15:19:27 -0500 |
| commit | d7bafff3f94efd850f8744d683e63812ff8d55c5 (patch) | |
| tree | ba2276597e2a533af54eff7db1042be2f8f7cbe2 | |
| parent | 181d6902b6bad978d157e69479c95cc0ff213a76 (diff) | |
rt2x00: don't write past the end when writing short descriptors on rt61
The space allocated in the skb for a descriptor is only 24 bytes when
setting up beacons in rt61 so make sure we don't write to the descriptor
words beyond that and corrupt the beacon packet.
Signed-off-by: Adam Baker <linux@baker-net.org.uk>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | drivers/net/wireless/rt2x00/rt61pci.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/net/wireless/rt2x00/rt61pci.c b/drivers/net/wireless/rt2x00/rt61pci.c index 547fa33e99dd..5e08541958cc 100644 --- a/drivers/net/wireless/rt2x00/rt61pci.c +++ b/drivers/net/wireless/rt2x00/rt61pci.c @@ -1531,9 +1531,11 @@ static void rt61pci_write_tx_desc(struct rt2x00_dev *rt2x00dev, rt2x00_set_field32(&word, TXD_W5_WAITING_DMA_DONE_INT, 1); rt2x00_desc_write(txd, 5, word); - rt2x00_desc_read(txd, 11, &word); - rt2x00_set_field32(&word, TXD_W11_BUFFER_LENGTH0, skbdesc->data_len); - rt2x00_desc_write(txd, 11, word); + if (skbdesc->desc_len > TXINFO_SIZE) { + rt2x00_desc_read(txd, 11, &word); + rt2x00_set_field32(&word, TXD_W11_BUFFER_LENGTH0, skbdesc->data_len); + rt2x00_desc_write(txd, 11, word); + } rt2x00_desc_read(txd, 0, &word); rt2x00_set_field32(&word, TXD_W0_OWNER_NIC, 1); |