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net: lan966x: fix a couple off by one bugs

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The lan966x->ports[] array has lan966x->num_phys_ports elements.  These
are assigned in lan966x_probe().  That means the > comparison should be
changed to >=.

The first off by one check is harmless but the second one could lead to
an out of bounds access and a crash.

Fixes: 5ccd66e01c ("net: lan966x: add support for interrupts from analyzer")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Dan Carpenter 2022-04-21 18:46:13 +03:00 committed by David S. Miller
parent 4e2e65e2e5
commit 9810c58c70
1 changed files with 2 additions and 2 deletions
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4
drivers/net/ethernet/microchip/lan966x/lan966x_mac.c
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@ -346,7 +346,7 @@ static void lan966x_mac_irq_process(struct lan966x *lan966x, u32 row,
lan966x_mac_process_raw_entry(&raw_entries[column],
mac, &vid, &dest_idx);
if (WARN_ON(dest_idx > lan966x->num_phys_ports))
if (WARN_ON(dest_idx >= lan966x->num_phys_ports))
continue;
/* If the entry in SW is found, then there is nothing
@ -393,7 +393,7 @@ static void lan966x_mac_irq_process(struct lan966x *lan966x, u32 row,
lan966x_mac_process_raw_entry(&raw_entries[column],
mac, &vid, &dest_idx);
if (WARN_ON(dest_idx > lan966x->num_phys_ports))
if (WARN_ON(dest_idx >= lan966x->num_phys_ports))
continue;
mac_entry = lan966x_mac_alloc_entry(mac, vid, dest_idx);