[PATCH V2] rtlwifi: rtl8192cu: Fix memset/memcpy using sizeof(ptr)not sizeof(*ptr)

From: Joe Perches
Date: Mon May 09 2011 - 13:09:44 EST


On Mon, 2011-05-09 at 11:02 -0500, Larry Finger wrote:
> On 05/09/2011 12:43 AM, Joe Perches wrote:
> > Found via coccinelle script
> > @@
> > type T;
> > T* ptr;
> > expression E1;
> > @@
> > * memset(E1, 0, sizeof(ptr));
> > Signed-off-by: Joe Perches<joe@xxxxxxxxxxx>
> > ---
> > drivers/net/wireless/rtlwifi/rtl8192cu/trx.c | 2 +-
> > 1 files changed, 1 insertions(+), 1 deletions(-)
> >
> > diff --git a/drivers/net/wireless/rtlwifi/rtl8192cu/trx.c b/drivers/net/wireless/rtlwifi/rtl8192cu/trx.c
> > @@ -372,7 +372,7 @@ static void _rtl_rx_process(struct ieee80211_hw *hw, struct sk_buff *skb)
[]
> > + memset(rx_status, 0, sizeof(*rx_status));
> ACK.

Hey Larry.

If this is correct, then probably the memcpy at the
end of the routine needs conversion too.

---

drivers/net/wireless/rtlwifi/rtl8192cu/trx.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/rtlwifi/rtl8192cu/trx.c b/drivers/net/wireless/rtlwifi/rtl8192cu/trx.c
index 79c98f6..3a92ba3 100644
--- a/drivers/net/wireless/rtlwifi/rtl8192cu/trx.c
+++ b/drivers/net/wireless/rtlwifi/rtl8192cu/trx.c
@@ -372,7 +372,7 @@ static void _rtl_rx_process(struct ieee80211_hw *hw, struct sk_buff *skb)
__le16 fc;
struct ieee80211_hdr *hdr;

- memset(rx_status, 0, sizeof(rx_status));
+ memset(rx_status, 0, sizeof(*rx_status));
rxdesc = skb->data;
skb_len = skb->len;
drvinfo_len = (GET_RX_DESC_DRVINFO_SIZE(rxdesc) * RTL_RX_DRV_INFO_UNIT);
@@ -434,7 +434,7 @@ static void _rtl_rx_process(struct ieee80211_hw *hw, struct sk_buff *skb)
"0x%02X\n", fc, (u32)hdr->addr1[0], (u32)hdr->addr1[1],
(u32)hdr->addr1[2], (u32)hdr->addr1[3], (u32)hdr->addr1[4],
(u32)hdr->addr1[5]));
- memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
+ memcpy(IEEE80211_SKB_RXCB(skb), rx_status, sizeof(*rx_status));
ieee80211_rx_irqsafe(hw, skb);
}



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