[PATCH AUTOSEL 5.4 233/350] ice: Check for null pointer dereference when setting rings
From: Sasha Levin <sashal@kernel.org>
Date: 2019-12-10 21:22:12
Also in:
intel-wired-lan, lkml, stable
Subsystem:
intel ethernet drivers, networking drivers, the rest · Maintainers:
Tony Nguyen, Przemek Kitszel, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Michal Swiatkowski <redacted> [ Upstream commit eb0ee8abfeb9ff4b98e8e40217b8667bfb08587a ] Without this check rebuild vsi can lead to kernel panic. Signed-off-by: Michal Swiatkowski <redacted> Tested-by: Andrew Bowers <redacted> Signed-off-by: Jeff Kirsher <redacted> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/net/ethernet/intel/ice/ice_main.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 214cd6eca405d..2408f0de95fc2 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c@@ -3970,8 +3970,13 @@ int ice_vsi_setup_tx_rings(struct ice_vsi *vsi) } ice_for_each_txq(vsi, i) { - vsi->tx_rings[i]->netdev = vsi->netdev; - err = ice_setup_tx_ring(vsi->tx_rings[i]); + struct ice_ring *ring = vsi->tx_rings[i]; + + if (!ring) + return -EINVAL; + + ring->netdev = vsi->netdev; + err = ice_setup_tx_ring(ring); if (err) break; }
@@ -3996,8 +4001,13 @@ int ice_vsi_setup_rx_rings(struct ice_vsi *vsi) } ice_for_each_rxq(vsi, i) { - vsi->rx_rings[i]->netdev = vsi->netdev; - err = ice_setup_rx_ring(vsi->rx_rings[i]); + struct ice_ring *ring = vsi->rx_rings[i]; + + if (!ring) + return -EINVAL; + + ring->netdev = vsi->netdev; + err = ice_setup_rx_ring(ring); if (err) break; }
--
2.20.1