diff options
| author | Konstantin Khorenko <khorenko@virtuozzo.com> | 2018-11-23 19:10:28 +0300 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2018-12-20 12:02:26 -0800 |
| commit | 31389b53b3e0b535867af9090a5d19ec64768d55 (patch) | |
| tree | 512c28eaa91cbedeac40993b1b2e37f7a920529e /drivers/net/ethernet | |
| parent | cd0d465bb697a9c7bf66a9fe940f7981232f1676 (diff) | |
i40e: define proper net_device::neigh_priv_len
Out of bound read reported by KASan.
i40iw_net_event() reads unconditionally 16 bytes from
neigh->primary_key while the memory allocated for
"neighbour" struct is evaluated in neigh_alloc() as
tbl->entry_size + dev->neigh_priv_len
where "dev" is a net_device.
But the driver does not setup dev->neigh_priv_len and
we read beyond the neigh entry allocated memory,
so the patch in the next mail fixes this.
Signed-off-by: Konstantin Khorenko <khorenko@virtuozzo.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ethernet')
| -rw-r--r-- | drivers/net/ethernet/intel/i40e/i40e_main.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c index fbb21ac06c98..5824d74bb8dc 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -12339,6 +12339,9 @@ static int i40e_config_netdev(struct i40e_vsi *vsi) ether_addr_copy(netdev->dev_addr, mac_addr); ether_addr_copy(netdev->perm_addr, mac_addr); + /* i40iw_net_event() reads 16 bytes from neigh->primary_key */ + netdev->neigh_priv_len = sizeof(u32) * 4; + netdev->priv_flags |= IFF_UNICAST_FLT; netdev->priv_flags |= IFF_SUPP_NOFCS; /* Setup netdev TC information */ |