diff options
| author | Konstantin Khorenko <khorenko@virtuozzo.com> | 2018-11-23 19:10:28 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-02-12 19:44:57 +0100 |
| commit | 5037c6ff109d72d6a7b33ae4b8f78a5279f080d0 (patch) | |
| tree | cb938d612ce56bf2e49903197c3c0ff0ab8e8ded | |
| parent | 06df6307c6e4a6735be96ee515b9a80f3a9ae051 (diff) | |
i40e: define proper net_device::neigh_priv_len
[ Upstream commit 31389b53b3e0b535867af9090a5d19ec64768d55 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -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 57c7456a5751..7836072d3f63 100644 --- a/drivers/net/ethernet/intel/i40e/i40e_main.c +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c @@ -9194,6 +9194,9 @@ 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 */ |