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rt2x00: Don't use unitialized rxdesc->size 

rxdesc->size is unitialized before the desriptor has been read.
Move the truncation of the sk buffer to the moment all variables
have been initialized.

Signed-off-by: Mattias Nissler <mattias.nissler@gmx.de>
Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Mattias Nissler 2008-03-09 22:41:22 +01:00 committed by John W. Linville
parent 2d1be5b0d1
commit 2ae23854dc
2 changed files with 14 additions and 8 deletions
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11
drivers/net/wireless/rt2x00/rt2500usb.c
View File

@ -1123,13 +1123,10 @@ static void rt2500usb_fill_rxdone(struct queue_entry *entry,
/*
* Copy descriptor to the available headroom inside the skbuffer.
* Remove the original copy by trimming the skbuffer.
*/
skb_push(entry->skb, offset);
memcpy(entry->skb->data, rxd, entry->queue->desc_size);
rxd = (__le32 *)entry->skb->data;
skb_pull(entry->skb, offset);
skb_trim(entry->skb, rxdesc->size);
/*
* The descriptor is now aligned to 4 bytes and thus it is
@ -1154,12 +1151,18 @@ static void rt2500usb_fill_rxdone(struct queue_entry *entry,
rxdesc->size = rt2x00_get_field32(word0, RXD_W0_DATABYTE_COUNT);
rxdesc->my_bss = !!rt2x00_get_field32(word0, RXD_W0_MY_BSS);
/*
* Adjust the skb memory window to the frame boundaries.
*/
skb_pull(entry->skb, offset);
skb_trim(entry->skb, rxdesc->size);
/*
* Set descriptor and data pointer.
*/
skbdesc->data = entry->skb->data;
skbdesc->data_len = rxdesc->size;
skbdesc->desc = entry->skb->data - offset;
skbdesc->desc = rxd;
skbdesc->desc_len = entry->queue->desc_size;
}

11
drivers/net/wireless/rt2x00/rt73usb.c
View File

@ -1376,13 +1376,10 @@ static void rt73usb_fill_rxdone(struct queue_entry *entry,
/*
* Copy descriptor to the available headroom inside the skbuffer.
* Remove the original copy by pulling the skbuffer.
*/
skb_push(entry->skb, offset);
memcpy(entry->skb->data, rxd, entry->queue->desc_size);
rxd = (__le32 *)entry->skb->data;
skb_pull(entry->skb, offset + entry->queue->desc_size);
skb_trim(entry->skb, rxdesc->size);
/*
* The descriptor is now aligned to 4 bytes and thus it is
@ -1404,12 +1401,18 @@ static void rt73usb_fill_rxdone(struct queue_entry *entry,
rxdesc->size = rt2x00_get_field32(word0, RXD_W0_DATABYTE_COUNT);
rxdesc->my_bss = !!rt2x00_get_field32(word0, RXD_W0_MY_BSS);
/*
* Adjust the skb memory window to the frame boundaries.
*/
skb_pull(entry->skb, offset + entry->queue->desc_size);
skb_trim(entry->skb, rxdesc->size);
/*
* Set descriptor and data pointer.
*/
skbdesc->data = entry->skb->data;
skbdesc->data_len = rxdesc->size;
skbdesc->desc = entry->skb->data - offset;
skbdesc->desc = rxd;
skbdesc->desc_len = entry->queue->desc_size;
}