From: Harshit Mogalapalli harshit.m.mogalapalli@oracle.com
[ Upstream commit 748b2f5e82d17480404b3e2895388fc2925f7caf ]
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@ora... Signed-off-by: Stefan Schmidt stefan@datenfreihafen.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ieee802154/ca8210.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/net/ieee802154/ca8210.c b/drivers/net/ieee802154/ca8210.c index 0b0c6c0764fe9..d0b5129439ed6 100644 --- a/drivers/net/ieee802154/ca8210.c +++ b/drivers/net/ieee802154/ca8210.c @@ -1902,10 +1902,9 @@ static int ca8210_skb_tx( struct ca8210_priv *priv ) { - int status; struct ieee802154_hdr header = { }; struct secspec secspec; - unsigned int mac_len; + int mac_len, status;
dev_dbg(&priv->spi->dev, "%s called\n", __func__);