2015-08-03 03:20:19

by Jia-Ju Bai

Subject: [PATCH] 3c59x: Fix resource leaks in vortex_open

When vortex_up is failed, the skb buffers allocated by __netdev_alloc_skb
in vortex_open are not released, which may cause resource leaks.
This bug has been submitted before.
This patch modifies the error handling code to fix it.

Signed-off-by: Jia-Ju Bai <[email protected]>
---
drivers/net/ethernet/3com/3c59x.c | 17 ++++++++---------
1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/3com/3c59x.c b/drivers/net/ethernet/3com/3c59x.c
index 2d1ce3c..753887d 100644
--- a/drivers/net/ethernet/3com/3c59x.c
+++ b/drivers/net/ethernet/3com/3c59x.c
@@ -1763,16 +1763,9 @@ vortex_open(struct net_device *dev)
vp->rx_ring[i].addr = cpu_to_le32(pci_map_single(VORTEX_PCI(vp), skb->data, PKT_BUF_SZ, PCI_DMA_FROMDEVICE));
}
if (i != RX_RING_SIZE) {
- int j;
pr_emerg("%s: no memory for rx ring\n", dev->name);
- for (j = 0; j < i; j++) {
- if (vp->rx_skbuff[j]) {
- dev_kfree_skb(vp->rx_skbuff[j]);
- vp->rx_skbuff[j] = NULL;
- }
- }
retval = -ENOMEM;
- goto err_free_irq;
+ goto err_free_skb;
}
/* Wrap the ring. */
vp->rx_ring[i-1].next = cpu_to_le32(vp->rx_ring_dma);
@@ -1782,7 +1775,13 @@ vortex_open(struct net_device *dev)
if (!retval)
goto out;

-err_free_irq:
+err_free_skb:
+ for (i = 0; i < RX_RING_SIZE; i++) {
+ if (vp->rx_skbuff[i]) {
+ dev_kfree_skb(vp->rx_skbuff[i]);
+ vp->rx_skbuff[i] = NULL;
+ }
+ }
free_irq(dev->irq, dev);
err:
if (vortex_debug > 1)
--
1.7.9.5

2015-08-03 22:21:53

by David Miller

Subject: Re: [PATCH] 3c59x: Fix resource leaks in vortex_open

From: Jia-Ju Bai <[email protected]>
Date: Mon, 3 Aug 2015 11:18:12 +0800

> When vortex_up is failed, the skb buffers allocated by __netdev_alloc_skb
> in vortex_open are not released, which may cause resource leaks.
> This bug has been submitted before.
> This patch modifies the error handling code to fix it.
>
> Signed-off-by: Jia-Ju Bai <[email protected]>

Applied, thanks.