diff options
| author | nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2013-03-10 21:59:28 +0000 |
|---|---|---|
| committer | nbd <nbd@3c298f89-4303-0410-b956-a3cf2f4a3e73> | 2013-03-10 21:59:28 +0000 |
| commit | 9f2ecab7f43f9078d1136582524629551427c8dd (patch) | |
| tree | e0064de701f9309d769f4581391258b54a40d054 /target/linux/cns3xxx | |
| parent | fb95b3dfd59d8bfef78d66b34083cab2c489ba2c (diff) | |
cns3xxx: prevent the ethernet driver from accessing uninitialized dma descriptor entries
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35950 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/cns3xxx')
| -rw-r--r-- | target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c b/target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c index 7a5c44cad6..c9040b1647 100644 --- a/target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c +++ b/target/linux/cns3xxx/files/drivers/net/ethernet/cavium/cns3xxx_eth.c @@ -619,8 +619,9 @@ static int eth_poll(struct napi_struct *napi, int budget) unsigned int length; unsigned int i = rx_ring->cur_index; struct rx_desc *desc = &(rx_ring)->desc[i]; + unsigned int alloc_count = rx_ring->alloc_count; - while (desc->cown) { + while (desc->cown && alloc_count + received < RX_DESCS - 1) { struct sk_buff *skb; int reserve = SKB_HEAD_ALIGN; |