From 1836098f97d22c81652aeeec64d1819dc2177bdb Mon Sep 17 00:00:00 2001 From: Manfred Spraul Date: Sat, 24 Dec 2005 14:19:24 +0100 Subject: [PATCH] [PATCH] forcedeth: fix random memory scribbling bug Two critical bugs were found in forcedeth 0.47: - TSO doesn't work. - pci_map_single() for the rx buffers is called with size==0. This bug is critical, it causes random memory corruptions on systems with an iommu. Below is a minimal fix for both bugs, for 2.6.15. TSO will be fixed properly in the next version. Tested on x86-64. Signed-Off-By: Manfred Spraul Signed-off-by: Linus Torvalds --- drivers/net/forcedeth.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/drivers/net/forcedeth.c b/drivers/net/forcedeth.c index 525624fc03b4..c39344adecce 100644 --- a/drivers/net/forcedeth.c +++ b/drivers/net/forcedeth.c @@ -10,7 +10,7 @@ * trademarks of NVIDIA Corporation in the United States and other * countries. * - * Copyright (C) 2003,4 Manfred Spraul + * Copyright (C) 2003,4,5 Manfred Spraul * Copyright (C) 2004 Andrew de Quincey (wol support) * Copyright (C) 2004 Carl-Daniel Hailfinger (invalid MAC handling, insane * IRQ rate fixes, bigendian fixes, cleanups, verification) @@ -100,6 +100,7 @@ * 0.45: 18 Sep 2005: Remove nv_stop/start_rx from every link check * 0.46: 20 Oct 2005: Add irq optimization modes. * 0.47: 26 Oct 2005: Add phyaddr 0 in phy scan. + * 0.48: 24 Dec 2005: Disable TSO, bugfix for pci_map_single * * Known bugs: * We suspect that on some hardware no TX done interrupts are generated. @@ -111,7 +112,7 @@ * DEV_NEED_TIMERIRQ will not harm you on sane hardware, only generating a few * superfluous timer interrupts from the nic. */ -#define FORCEDETH_VERSION "0.47" +#define FORCEDETH_VERSION "0.48" #define DRV_NAME "forcedeth" #include @@ -871,8 +872,8 @@ static int nv_alloc_rx(struct net_device *dev) } else { skb = np->rx_skbuff[nr]; } - np->rx_dma[nr] = pci_map_single(np->pci_dev, skb->data, skb->len, - PCI_DMA_FROMDEVICE); + np->rx_dma[nr] = pci_map_single(np->pci_dev, skb->data, + skb->end-skb->data, PCI_DMA_FROMDEVICE); if (np->desc_ver == DESC_VER_1 || np->desc_ver == DESC_VER_2) { np->rx_ring.orig[nr].PacketBuffer = cpu_to_le32(np->rx_dma[nr]); wmb(); @@ -999,7 +1000,7 @@ static void nv_drain_rx(struct net_device *dev) wmb(); if (np->rx_skbuff[i]) { pci_unmap_single(np->pci_dev, np->rx_dma[i], - np->rx_skbuff[i]->len, + np->rx_skbuff[i]->end-np->rx_skbuff[i]->data, PCI_DMA_FROMDEVICE); dev_kfree_skb(np->rx_skbuff[i]); np->rx_skbuff[i] = NULL; @@ -1334,7 +1335,7 @@ static void nv_rx_process(struct net_device *dev) * the performance. */ pci_unmap_single(np->pci_dev, np->rx_dma[i], - np->rx_skbuff[i]->len, + np->rx_skbuff[i]->end-np->rx_skbuff[i]->data, PCI_DMA_FROMDEVICE); { @@ -2455,7 +2456,7 @@ static int __devinit nv_probe(struct pci_dev *pci_dev, const struct pci_device_i np->txrxctl_bits |= NVREG_TXRXCTL_RXCHECK; dev->features |= NETIF_F_HW_CSUM | NETIF_F_SG; #ifdef NETIF_F_TSO - dev->features |= NETIF_F_TSO; + /* disabled dev->features |= NETIF_F_TSO; */ #endif } -- 2.20.1