From 018df4cac217ae3ad0607681b84921310556a7c1 Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Thu, 12 Mar 2020 15:04:30 +0000 Subject: [PATCH] net: systemport: fix index check to avoid an array out of bounds access Currently the bounds check on index is off by one and can lead to an out of bounds access on array priv->filters_loc when index is RXCHK_BRCM_TAG_MAX. Fixes: 2302389b8f27 ("net: systemport: Add support for WAKE_FILTER") Signed-off-by: Colin Ian King Signed-off-by: David S. Miller --- drivers/net/ethernet/broadcom/bcmsysport.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/broadcom/bcmsysport.c b/drivers/net/ethernet/broadcom/bcmsysport.c index e0611cba87f95..15b31cddc054b 100644 --- a/drivers/net/ethernet/broadcom/bcmsysport.c +++ b/drivers/net/ethernet/broadcom/bcmsysport.c @@ -2135,7 +2135,7 @@ static int bcm_sysport_rule_set(struct bcm_sysport_priv *priv, return -ENOSPC; index = find_first_zero_bit(priv->filters, RXCHK_BRCM_TAG_MAX); - if (index > RXCHK_BRCM_TAG_MAX) + if (index >= RXCHK_BRCM_TAG_MAX) return -ENOSPC; /* Location is the classification ID, and index is the position -- 2.39.5