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dpaa2-eth: prevent array underflow in update_cls_rule()

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[ Upstream commit 6d32a5119811d2e9b5caa284181944c6f1f192ed ]

The "location" is controlled by the user via the ethtool_set_rxnfc()
function.  This update_cls_rule() function checks for array overflows
but it doesn't check if the value is negative.  I have changed the type
to unsigned to prevent array underflows.

Fixes: afb90dbb5f ("dpaa2-eth: Add ethtool support for flow classification")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dan Carpenter 2020-05-08 17:37:20 +03:00 • committed by Greg Kroah-Hartman
commit d07987924a
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c
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@ -590,7 +590,7 @@ static int num_rules(struct dpaa2_eth_priv *priv)
static int update_cls_rule(struct net_device *net_dev,
struct ethtool_rx_flow_spec *new_fs,
int location)
unsigned int location)
{
struct dpaa2_eth_priv *priv = netdev_priv(net_dev);
struct dpaa2_eth_cls_rule *rule;