net: aquantia: fixed instack structure overflow

This is a real stack undercorruption found by kasan build.

The issue did no harm normally because it only overflowed
2 bytes after `bitary` array which on most architectures
were mapped into `err` local.

Fixes: bab6de8fd180 ("net: ethernet: aquantia: Atlantic A0 and B0 specific functions.")
Signed-off-by: Nikita Danilov <nikita.danilov@aquantia.com>
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c
index 2469ed4d86b939816e46c59fb631820f8cf3872a..30fdcb9b11fdb697d31a42b607ea589eb0a4e00d 100644 (file)
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c
@@ -207,8 +207,8 @@ static int hw_atl_a0_hw_rss_set(struct aq_hw_s *self,
        u32 i = 0U;
        u32 num_rss_queues = max(1U, self->aq_nic_cfg->num_rss_queues);
        int err = 0;
-       u16 bitary[(HW_ATL_A0_RSS_REDIRECTION_MAX *
-                                       HW_ATL_A0_RSS_REDIRECTION_BITS / 16U)];
+       u16 bitary[1 + (HW_ATL_A0_RSS_REDIRECTION_MAX *
+                  HW_ATL_A0_RSS_REDIRECTION_BITS / 16U)];
 
        memset(bitary, 0, sizeof(bitary));
 

diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
index b58ca7cb8e9d4eef80055cfdba3dab08db4127ad..c4cdc51350b25eca2c78a63cc9a24b1e3b8f1a0f 100644 (file)
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
@@ -199,8 +199,8 @@ static int hw_atl_b0_hw_rss_set(struct aq_hw_s *self,
        u32 i = 0U;
        u32 num_rss_queues = max(1U, self->aq_nic_cfg->num_rss_queues);
        int err = 0;
-       u16 bitary[(HW_ATL_B0_RSS_REDIRECTION_MAX *
-                                       HW_ATL_B0_RSS_REDIRECTION_BITS / 16U)];
+       u16 bitary[1 + (HW_ATL_B0_RSS_REDIRECTION_MAX *
+                  HW_ATL_B0_RSS_REDIRECTION_BITS / 16U)];
 
        memset(bitary, 0, sizeof(bitary));