diff options
| author | Krzysztof Kazimierczak <krzysztof.kazimierczak@intel.com> | 2019-12-12 03:13:06 -0800 |
|---|---|---|
| committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2020-01-03 16:08:33 -0800 |
| commit | 65bb559b6c11dfe3311d1b77ba5a4b8b34a3ec75 (patch) | |
| tree | bb13ce2017a95577a14e46ea02ab0c535bde2476 /drivers/net/ethernet/intel/ice/ice_base.c | |
| parent | 1f45ebe0d8fbe6178670b663005f38ef8535db5d (diff) | |
ice: Add a boundary check in ice_xsk_umem()
In ice_xsk_umem(), variable qid which is later used as an array index,
is not validated for a possible boundary exceedance. Because of that,
a calling function might receive an invalid address, which causes
general protection fault when dereferenced.
To address this, add a boundary check to see if qid is greater than the
size of a UMEM array. Also, don't let user change vsi->num_xsk_umems
just by trying to setup a second UMEM if its value is already set up
(i.e. UMEM region has already been allocated for this VSI).
While at it, make sure that ring->zca.free pointer is always zeroed out
if there is no UMEM on a specified ring.
Signed-off-by: Krzysztof Kazimierczak <krzysztof.kazimierczak@intel.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/intel/ice/ice_base.c')
| -rw-r--r-- | drivers/net/ethernet/intel/ice/ice_base.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_base.c b/drivers/net/ethernet/intel/ice/ice_base.c index d4559d45288f..25f2e0fb3833 100644 --- a/drivers/net/ethernet/intel/ice/ice_base.c +++ b/drivers/net/ethernet/intel/ice/ice_base.c @@ -326,6 +326,7 @@ int ice_setup_rx_ctx(struct ice_ring *ring) dev_info(&vsi->back->pdev->dev, "Registered XDP mem model MEM_TYPE_ZERO_COPY on Rx ring %d\n", ring->q_index); } else { + ring->zca.free = NULL; if (!xdp_rxq_info_is_reg(&ring->xdp_rxq)) xdp_rxq_info_reg(&ring->xdp_rxq, ring->netdev, |