From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Kweku Adams <kwekua@google.com>
Date: Wed, 21 Sep 2022 22:13:01 +0000
Subject: [PATCH] Handle invalid data during job loading.

Catch exceptions that may be thrown if invalid data ended up in the
persisted job file.

Bug: 246541702
Bug: 246542132
Bug: 246542285
Bug: 246542330
Test: install test app with invalid job config, start app to schedule job, then reboot device
(cherry picked from commit c98fb42b480b3beedc2d94de6110f50212c4aa0b)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:df1ba00dd9f64a3ae9a9e05979dfae6a15c7e203)
Merged-In: Id0ceba345942baf21177f687b8dd85ef001c0a9e
Change-Id: Id0ceba345942baf21177f687b8dd85ef001c0a9e
---
 .../java/com/android/server/job/JobStore.java | 26 ++++++++++++++++---
 1 file changed, 23 insertions(+), 3 deletions(-)

diff --git a/services/core/java/com/android/server/job/JobStore.java b/services/core/java/com/android/server/job/JobStore.java
index 4f8b1dcc6bb4..7f2d7fb5987d 100644
--- a/services/core/java/com/android/server/job/JobStore.java
+++ b/services/core/java/com/android/server/job/JobStore.java
@@ -623,6 +623,10 @@ public final class JobStore {
                 }
             } catch (XmlPullParserException | IOException e) {
                 Slog.wtf(TAG, "Error jobstore xml.", e);
+            } catch (Exception e) {
+                // Crashing at this point would result in a boot loop, so live with a general
+                // Exception for system stability's sake.
+                Slog.wtf(TAG, "Unexpected exception", e);
             } finally {
                 if (mPersistInfo.countAllJobsLoaded < 0) { // Only set them once.
                     mPersistInfo.countAllJobsLoaded = numJobs;
@@ -753,6 +757,15 @@ public final class JobStore {
             } catch (NumberFormatException e) {
                 Slog.d(TAG, "Error reading constraints, skipping.");
                 return null;
+            } catch (XmlPullParserException e) {
+                Slog.d(TAG, "Error Parser Exception.", e);
+                return null;
+            } catch (IOException e) {
+                Slog.d(TAG, "Error I/O Exception.", e);
+                return null;
+            } catch (IllegalArgumentException e) {
+                Slog.e(TAG, "Constraints contained invalid data", e);
+                return null;
             }
             parser.next(); // Consume </constraints>
 
@@ -848,8 +861,14 @@ public final class JobStore {
                 return null;
             }
 
-            PersistableBundle extras = PersistableBundle.restoreFromXml(parser);
-            jobBuilder.setExtras(extras);
+            final PersistableBundle extras;
+            try {
+                extras = PersistableBundle.restoreFromXml(parser);
+                jobBuilder.setExtras(extras);
+            } catch (IllegalArgumentException e) {
+                Slog.e(TAG, "Persisted extras contained invalid data", e);
+                return null;
+            }
             parser.nextTag(); // Consume </extras>
 
             // Migrate sync jobs forward from earlier, incomplete representation
@@ -887,7 +906,8 @@ public final class JobStore {
             return new JobInfo.Builder(jobId, cname);
         }
 
-        private void buildConstraintsFromXml(JobInfo.Builder jobBuilder, XmlPullParser parser) {
+        private void buildConstraintsFromXml(JobInfo.Builder jobBuilder, XmlPullParser parser)
+                throws XmlPullParserException, IOException {
             String val;
 
             final String netCapabilities = parser.getAttributeValue(null, "net-capabilities");