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authorVasily Averin <vvs@sw.ru>2006-09-27 12:54:14 -0700
committerAuke Kok <juke-jan.h.kok@intel.com>2006-09-27 12:54:14 -0700
commit793fab727324adc90a0a2889f2b1d88bae4790eb (patch)
treeeadf2858ba29efe65cb416d74cb3afcc194715f3 /drivers/net/e1000
parentdbf38c9474306297866d9c2af02c2d37c5165325 (diff)
e1000: possible memory leak in e1000_set_ringparam
Memory allocated for new tx_ring and rx_ring leaks if e1000_setup_XX_resources() fails.c Also this patch reduces stack usage (removed tx_new and rx_new) and uses kzalloc instead kmalloc+memset(0) Signed-off-by: Vasily Averin <vvs@sw.ru> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com>
Diffstat (limited to 'drivers/net/e1000')
-rw-r--r--drivers/net/e1000/e1000_ethtool.c38
1 files changed, 17 insertions, 21 deletions
diff --git a/drivers/net/e1000/e1000_ethtool.c b/drivers/net/e1000/e1000_ethtool.c
index 2cc949a3445..778ede3c021 100644
--- a/drivers/net/e1000/e1000_ethtool.c
+++ b/drivers/net/e1000/e1000_ethtool.c
@@ -646,8 +646,8 @@ e1000_set_ringparam(struct net_device *netdev,
{
struct e1000_adapter *adapter = netdev_priv(netdev);
e1000_mac_type mac_type = adapter->hw.mac_type;
- struct e1000_tx_ring *txdr, *tx_old, *tx_new;
- struct e1000_rx_ring *rxdr, *rx_old, *rx_new;
+ struct e1000_tx_ring *txdr, *tx_old;
+ struct e1000_rx_ring *rxdr, *rx_old;
int i, err, tx_ring_size, rx_ring_size;
if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
@@ -665,23 +665,17 @@ e1000_set_ringparam(struct net_device *netdev,
tx_old = adapter->tx_ring;
rx_old = adapter->rx_ring;
- adapter->tx_ring = kmalloc(tx_ring_size, GFP_KERNEL);
- if (!adapter->tx_ring) {
- err = -ENOMEM;
- goto err_setup_rx;
- }
- memset(adapter->tx_ring, 0, tx_ring_size);
+ err = -ENOMEM;
+ txdr = kzalloc(tx_ring_size, GFP_KERNEL);
+ if (!txdr)
+ goto err_alloc_tx;
- adapter->rx_ring = kmalloc(rx_ring_size, GFP_KERNEL);
- if (!adapter->rx_ring) {
- kfree(adapter->tx_ring);
- err = -ENOMEM;
- goto err_setup_rx;
- }
- memset(adapter->rx_ring, 0, rx_ring_size);
+ rxdr = kzalloc(rx_ring_size, GFP_KERNEL);
+ if (!rxdr)
+ goto err_alloc_rx;
- txdr = adapter->tx_ring;
- rxdr = adapter->rx_ring;
+ adapter->tx_ring = txdr;
+ adapter->rx_ring = rxdr;
rxdr->count = max(ring->rx_pending,(uint32_t)E1000_MIN_RXD);
rxdr->count = min(rxdr->count,(uint32_t)(mac_type < e1000_82544 ?
@@ -708,16 +702,14 @@ e1000_set_ringparam(struct net_device *netdev,
/* save the new, restore the old in order to free it,
* then restore the new back again */
- rx_new = adapter->rx_ring;
- tx_new = adapter->tx_ring;
adapter->rx_ring = rx_old;
adapter->tx_ring = tx_old;
e1000_free_all_rx_resources(adapter);
e1000_free_all_tx_resources(adapter);
kfree(tx_old);
kfree(rx_old);
- adapter->rx_ring = rx_new;
- adapter->tx_ring = tx_new;
+ adapter->rx_ring = rxdr;
+ adapter->tx_ring = txdr;
if ((err = e1000_up(adapter)))
goto err_setup;
}
@@ -729,6 +721,10 @@ err_setup_tx:
err_setup_rx:
adapter->rx_ring = rx_old;
adapter->tx_ring = tx_old;
+ kfree(rxdr);
+err_alloc_rx:
+ kfree(txdr);
+err_alloc_tx:
e1000_up(adapter);
err_setup:
clear_bit(__E1000_RESETTING, &adapter->flags);