--- /dev/null
+From 748b2f5e82d17480404b3e2895388fc2925f7caf Mon Sep 17 00:00:00 2001
+From: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
+Date: Mon, 6 Mar 2023 11:18:24 -0800
+Subject: ca8210: Fix unsigned mac_len comparison with zero in ca8210_skb_tx()
+
+From: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
+
+commit 748b2f5e82d17480404b3e2895388fc2925f7caf upstream.
+
+mac_len is of type unsigned, which can never be less than zero.
+
+ mac_len = ieee802154_hdr_peek_addrs(skb, &header);
+ if (mac_len < 0)
+ return mac_len;
+
+Change this to type int as ieee802154_hdr_peek_addrs() can return negative
+integers, this is found by static analysis with smatch.
+
+Fixes: 6c993779ea1d ("ca8210: fix mac_len negative array access")
+Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
+Acked-by: Alexander Aring <aahringo@redhat.com>
+Reviewed-by: Simon Horman <simon.horman@corigine.com>
+Link: https://lore.kernel.org/r/20230306191824.4115839-1-harshit.m.mogalapalli@oracle.com
+Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/net/ieee802154/ca8210.c | 3 +--
+ 1 file changed, 1 insertion(+), 2 deletions(-)
+
+--- a/drivers/net/ieee802154/ca8210.c
++++ b/drivers/net/ieee802154/ca8210.c
+@@ -1944,10 +1944,9 @@ static int ca8210_skb_tx(
+ struct ca8210_priv *priv
+ )
+ {
+- int status;
+ struct ieee802154_hdr header = { 0 };
+ struct secspec secspec;
+- unsigned int mac_len;
++ int mac_len, status;
+
+ dev_dbg(&priv->spi->dev, "ca8210_skb_tx() called\n");
+