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42 lines
1.9 KiB
Diff
42 lines
1.9 KiB
Diff
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Michael Wright <michaelwr@google.com>
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Date: Mon, 26 Sep 2022 20:37:33 +0100
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Subject: [PATCH] Reconcile WorkSource parcel and unparcel code.
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Prior to this CL, WorkSources would Parcel their list of WorkChains as
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-1 if null, or the size of the list followed by the list itself if
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non-null. When reading it back in, on the other hand, they would check
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if the size was positive, and only then read the list from the Parcel.
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This works for all cases except when the WorkSource has an empty but
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non-null list of WorkChains as the list would get written to the parcel,
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but then never read on the other side.
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If parceling a list was a no-op when empty this wouldn't be an issue,
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but it must write at least its size into the parcel to know how many
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elements to extract. In the empty list case, this single element is left
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unread as the size is not positive which essentially corrupts any future
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items read from that same parcelable.
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Bug: 220302519
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Test: atest android.security.cts.WorkSourceTest#testWorkChainParceling
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Change-Id: I2fec40dfced420ca38e717059b0e95ee8ef9946a
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(cherry picked from commit 266b3bddcf14d448c0972db64b42950f76c759e3)
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Merged-In: I2fec40dfced420ca38e717059b0e95ee8ef9946a
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---
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core/java/android/os/WorkSource.java | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/core/java/android/os/WorkSource.java b/core/java/android/os/WorkSource.java
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index 327071906e18..c2f43edfc8af 100644
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--- a/core/java/android/os/WorkSource.java
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+++ b/core/java/android/os/WorkSource.java
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@@ -107,7 +107,7 @@ public class WorkSource implements Parcelable {
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mNames = in.createStringArray();
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int numChains = in.readInt();
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- if (numChains > 0) {
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+ if (numChains >= 0) {
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mChains = new ArrayList<>(numChains);
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in.readParcelableList(mChains, WorkChain.class.getClassLoader());
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} else {
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