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| author | Felix Fietkau <nbd@openwrt.org> | 2013-03-10 21:59:28 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2013-03-10 21:59:28 +0000 |
| commit | ee2b511e1f232487540c79dc120c097c5bd49a37 (patch) | |
| tree | c5eda09f34963d5218e15538f205a81f3a03dd98 | |
| parent | d22ac8d8fb6e7b62d1ddf2f19ae61ec6c82222c0 (diff) | |
| download | upstream-ee2b511e1f232487540c79dc120c097c5bd49a37.tar.gz upstream-ee2b511e1f232487540c79dc120c097c5bd49a37.tar.bz2 upstream-ee2b511e1f232487540c79dc120c097c5bd49a37.zip | |
cns3xxx: prevent the ethernet driver from accessing uninitialized dma descriptor entries
SVN-Revision: 35950
| -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; |