[PATCH 4.19 074/243] ice: Fix possible NULL pointer de-reference

Greg Kroah-Hartman
2019-12-11T15:20:38Z

From: Bruce Allan <bruce.w.allan@intel.com>

[ Upstream commit f25dad19ba70f7cc135da78ec013325042cd8c52 ]

A recent update to smatch is causing it to report the error "we previously
assumed 'm_entry->vsi_list_info' could be null". Fix that.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.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>
---
drivers/net/ethernet/intel/ice/ice_switch.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/intel/ice/ice_switch.c b/drivers/net/ethernet/intel/ice/ice_switch.c
index 4012adbab0112..1bfc59dff51f7 100644
--- a/drivers/net/ethernet/intel/ice/ice_switch.c
+++ b/drivers/net/ethernet/intel/ice/ice_switch.c
@@ -1023,6 +1023,9 @@ ice_handle_vsi_list_mgmt(struct ice_hw *hw,
u16 vsi_id = new_fltr->fwd_id.vsi_id;
enum ice_adminq_opc opcode;

+ if (!m_entry->vsi_list_info)
+ return ICE_ERR_CFG;
+
/* A rule already exists with the new VSI being added */
if (test_bit(vsi_id, m_entry->vsi_list_info->vsi_map))
return 0;
--
2.20.1