This patch replaces the memcpy with a put_unaligned_le16. The placement
of crc inside of PSDU can also be unaligned. With memcpy this can fail
on some architectures.
Signed-off-by: Alexander Aring <alex.aring@xxxxxxxxx>
Reported-by: Marcel Holtmann <marcel@xxxxxxxxxxxx>
---
net/mac802154/tx.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/net/mac802154/tx.c b/net/mac802154/tx.c
index fe2e17e..31e51e4 100644
--- a/net/mac802154/tx.c
+++ b/net/mac802154/tx.c
@@ -20,6 +20,7 @@
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <linux/crc-ccitt.h>
+#include <asm/unaligned.h>
#include <net/rtnetlink.h>
#include <net/ieee802154_netdev.h>
@@ -84,9 +85,9 @@ ieee802154_tx(struct ieee802154_local *local, struct sk_buff *skb)
mac802154_monitors_rx(local, skb);
if (!(local->hw.flags & IEEE802154_HW_OMIT_CKSUM)) {
- __le16 crc = cpu_to_le16(crc_ccitt(0, skb->data, skb->len));
+ u16 crc = crc_ccitt(0, skb->data, skb->len);
- memcpy(skb_put(skb, 2), &crc, 2);
+ put_unaligned_le16(crc, skb_put(skb, 2));
}
if (skb_cow_head(skb, local->hw.extra_tx_headroom))
--
2.1.2
--
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