ice: Fix a null pointer dereference in ice_copy_and_init_pkg()

Add check for the return value of devm_kmemdup()
to prevent potential null pointer dereference.

Fixes: c764881 ("ice: Implement Dynamic Device Personalization (DDP) download")
Cc: [email protected]
Signed-off-by: Haoxiang Li <[email protected]>
Reviewed-by: Michal Swiatkowski <[email protected]>
Reviewed-by: Aleksandr Loktionov <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Tested-by: Rinitha S <[email protected]> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <[email protected]>

Author: Haoxiang Li

drivers/net/ethernet/intel/ice/ice_ddp.c

@@ -2301,6 +2301,8 @@ enum ice_ddp_state ice_copy_and_init_pkg(struct ice_hw *hw, const u8 *buf,
 		return ICE_DDP_PKG_ERR;
 
 	buf_copy = devm_kmemdup(ice_hw_to_dev(hw), buf, len, GFP_KERNEL);
+	if (!buf_copy)
+		return ICE_DDP_PKG_ERR;
 
 	state = ice_init_pkg(hw, buf_copy, len);
 	if (!ice_is_init_pkg_successful(state)) {