linux-kernel - [PATCH 5/9] drivers/net/wireless: Correct code taking the size of a pointer

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Date:	Sun, 13 Dec 2009 12:42:07 +0100 (CET)
From:	Julia Lawall <julia@...u.dk>
To:	Ivo van Doorn <IvDoorn@...il.com>,
	Gertjan van Wingerde <gwingerde@...il.com>,
	"John W. Linville" <linville@...driver.com>,
	linux-wireless@...r.kernel.org, users@...x00.serialmonkey.com,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [PATCH 5/9] drivers/net/wireless: Correct code taking the size of
 a pointer

From: Julia Lawall <julia@...u.dk>

sizeof(iv16) and sizeof(iv32) are the sizes of pointers.  Change them to
the size of the copied data.

A simplified version of the semantic patch that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression *x;
expression f;
type T;
@@

*f(...,(T)x,...)
// </smpl>

Signed-off-by: Julia Lawall <julia@...u.dk>

---
 drivers/net/wireless/rt2x00/rt2800lib.c        |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
index eb1e1d0..1e74732 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -2140,8 +2140,8 @@ static void rt2800_get_tkip_seq(struct ieee80211_hw *hw, u8 hw_key_idx,
 	rt2800_register_multiread(rt2x00dev, offset,
 				      &iveiv_entry, sizeof(iveiv_entry));
 
-	memcpy(&iveiv_entry.iv[0], iv16, sizeof(iv16));
-	memcpy(&iveiv_entry.iv[4], iv32, sizeof(iv32));
+	memcpy(&iveiv_entry.iv[0], iv16, sizeof(*iv16));
+	memcpy(&iveiv_entry.iv[4], iv32, sizeof(*iv32));
 }
 
 static int rt2800_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
--
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