From a85a46f2c38def5150251816890393803fdae7d0 Mon Sep 17 00:00:00 2001 From: Kevin Vigor Date: Thu, 22 Sep 2005 00:49:24 -0700 Subject: [PATCH] [PATCH] USB: fix pegasus driver Addresses some small bugs in the pegasus ethernet-over-USB driver. Specifically, malformed long packets from the adapter could cause a kernel panic; the interrupt interval calculation was inappropriate for high-speed devices; the return code from read_mii_word was tested incorrectly; and failure to unlink outstanding URBs before freeing them could lead to kernel panics when unloading the driver. Signed-off-by: Kevin Vigor Cc: Petko Manolov Signed-off-by: Andrew Morton Signed-off-by: Greg Kroah-Hartman Signed-off-by: Linus Torvalds --- drivers/usb/net/pegasus.c | 29 ++++++++++++++++++++--------- 1 file changed, 20 insertions(+), 9 deletions(-) diff --git a/drivers/usb/net/pegasus.c b/drivers/usb/net/pegasus.c index 7484d34780fc..6a4ffe6c3977 100644 --- a/drivers/usb/net/pegasus.c +++ b/drivers/usb/net/pegasus.c @@ -647,6 +647,13 @@ static void read_bulk_callback(struct urb *urb, struct pt_regs *regs) pkt_len -= 8; } + /* + * If the packet is unreasonably long, quietly drop it rather than + * kernel panicing by calling skb_put. + */ + if (pkt_len > PEGASUS_MTU) + goto goon; + /* * at this point we are sure pegasus->rx_skb != NULL * so we go ahead and pass up the packet. @@ -886,15 +893,17 @@ static inline void get_interrupt_interval(pegasus_t * pegasus) __u8 data[2]; read_eprom_word(pegasus, 4, (__u16 *) data); - if (data[1] < 0x80) { - if (netif_msg_timer(pegasus)) - dev_info(&pegasus->intf->dev, - "intr interval changed from %ums to %ums\n", - data[1], 0x80); - data[1] = 0x80; -#ifdef PEGASUS_WRITE_EEPROM - write_eprom_word(pegasus, 4, *(__u16 *) data); + if (pegasus->usb->speed != USB_SPEED_HIGH) { + if (data[1] < 0x80) { + if (netif_msg_timer(pegasus)) + dev_info(&pegasus->intf->dev, "intr interval " + "changed from %ums to %ums\n", + data[1], 0x80); + data[1] = 0x80; +#ifdef PEGASUS_WRITE_EEPROM + write_eprom_word(pegasus, 4, *(__u16 *) data); #endif + } } pegasus->intr_interval = data[1]; } @@ -904,8 +913,9 @@ static void set_carrier(struct net_device *net) pegasus_t *pegasus = netdev_priv(net); u16 tmp; - if (read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp)) + if (!read_mii_word(pegasus, pegasus->phy, MII_BMSR, &tmp)) return; + if (tmp & BMSR_LSTATUS) netif_carrier_on(net); else @@ -1355,6 +1365,7 @@ static void pegasus_disconnect(struct usb_interface *intf) cancel_delayed_work(&pegasus->carrier_check); unregister_netdev(pegasus->net); usb_put_dev(interface_to_usbdev(intf)); + unlink_all_urbs(pegasus); free_all_urbs(pegasus); free_skb_pool(pegasus); if (pegasus->rx_skb) -- GitLab