WifiScanninService: Reject bgscan requests on invalid caps

Reject any bgscan requests if the HAL returns invalid capabilities at
startup.

Bug: 33566846
Test: Added unit test.
Change-Id: I1a6a986194dd0da2ef139f13307657aafd67b4e4

1 files changed, 5 insertions, 0 deletions

diff --git a/service/java/com/android/server/wifi/scanner/WifiScanningServiceImpl.java b/service/java/com/android/server/wifi/scanner/WifiScanningServiceImpl.java
index 68c917ffd..8846fe3a4 100644
--- a/service/java/com/android/server/wifi/scanner/WifiScanningServiceImpl.java
+++ b/service/java/com/android/server/wifi/scanner/WifiScanningServiceImpl.java
@@ -1002,6 +1002,11 @@ public class WifiScanningServiceImpl extends IWifiScanner.Stub {
                             loge("could not get scan capabilities");
                             return HANDLED;
                         }
+                        if (capabilities.max_scan_buckets <= 0) {
+                            loge("invalid max buckets in scan capabilities "
+                                    + capabilities.max_scan_buckets);
+                            return HANDLED;
+                        }
                         mBackgroundScheduler.setMaxBuckets(capabilities.max_scan_buckets);
                         mBackgroundScheduler.setMaxApPerScan(capabilities.max_ap_cache_per_scan);