From: Steve Glendinning Date: Fri, 30 Nov 2012 05:55:48 +0000 (+0000) Subject: smsc95xx: fix suspend buffer overflow X-Git-Tag: master-2012-12-14~5^2~154 X-Git-Url: http://pileus.org/git/?a=commitdiff_plain;h=eed9a72914a2b2737a0d91b80579f878999574ef;p=~andy%2Flinux smsc95xx: fix suspend buffer overflow This patch fixes a buffer overflow introduced by bbd9f9e, where the filter_mask array is accessed beyond its bounds. Updated to also add a check for kzalloc failure, as reported by Bjorn Mork and Joe Perches. Reported-by: Dan Carpenter Signed-off-by: Steve Glendinning Cc: Bjorn Mork Cc: Joe Perches Signed-off-by: David S. Miller --- diff --git a/drivers/net/usb/smsc95xx.c b/drivers/net/usb/smsc95xx.c index 79d495d1554..c397b3a04f1 100644 --- a/drivers/net/usb/smsc95xx.c +++ b/drivers/net/usb/smsc95xx.c @@ -1281,7 +1281,7 @@ static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) } if (pdata->wolopts & (WAKE_BCAST | WAKE_MCAST | WAKE_ARP | WAKE_UCAST)) { - u32 *filter_mask = kzalloc(32, GFP_KERNEL); + u32 *filter_mask = kzalloc(sizeof(u32) * 32, GFP_KERNEL); u32 command[2]; u32 offset[2]; u32 crc[4]; @@ -1290,6 +1290,11 @@ static int smsc95xx_suspend(struct usb_interface *intf, pm_message_t message) LAN9500A_WUFF_NUM : LAN9500_WUFF_NUM; int i, filter = 0; + if (!filter_mask) { + netdev_warn(dev->net, "Unable to allocate filter_mask\n"); + return -ENOMEM; + } + memset(command, 0, sizeof(command)); memset(offset, 0, sizeof(offset)); memset(crc, 0, sizeof(crc));