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net/mlx5: E-Switch, Fix out of bound access when setting vport rate

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[ Upstream commit 11aa5800ed ]

The code that deals with eswitch vport bw guarantee was going beyond the
eswitch vport array limit, fix that.  This was pointed out by the kernel
address sanitizer (KASAN).

The error from KASAN log:
[2018-09-15 15:04:45] BUG: KASAN: slab-out-of-bounds in
mlx5_eswitch_set_vport_rate+0x8c1/0xae0 [mlx5_core]

Fixes: c9497c9890 ("net/mlx5: Add support for setting VF min rate")
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Eran Ben Elisha
2018-10-18 09:18:09 +02:00
committed by Greg Kroah-Hartman
parent 02e16d375e
commit 92a2a40c87
1 changed files with 2 additions and 2 deletions
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drivers/net/ethernet/mellanox/mlx5/core/eswitch.c
+2 -2
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@@ -2000,7 +2000,7 @@ static u32 calculate_vports_min_rate_divider(struct mlx5_eswitch *esw)
u32 max_guarantee = 0;
int i;
for (i = 0; i <= esw->total_vports; i++) {
for (i = 0; i < esw->total_vports; i++) {
evport = &esw->vports[i];
if (!evport->enabled || evport->info.min_rate < max_guarantee)
continue;
@@ -2020,7 +2020,7 @@ static int normalize_vports_min_rate(struct mlx5_eswitch *esw, u32 divider)
int err;
int i;
for (i = 0; i <= esw->total_vports; i++) {
for (i = 0; i < esw->total_vports; i++) {
evport = &esw->vports[i];
if (!evport->enabled)
continue;