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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: bb9051a2b2 ("net: systemport: Add support for WAKE_FILTER")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
alistair/sensors
Colin Ian King 2020-03-12 15:04:30 +00:00 committed by David S. Miller
parent 9d0e0cd9a5
commit c0368595c1
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/broadcom/bcmsysport.c
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@ -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