mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
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87 lines
3.5 KiB
Diff
87 lines
3.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Yuri Lin <yurilin@google.com>
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Date: Tue, 13 Sep 2022 12:53:19 -0400
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Subject: [PATCH] Limit lengths of fields in Condition to a max length.
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This app-generated input needs to not be too long to avoid errors in the process of writing to disk.
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Bug: 242846316
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Test: cts ConditionTest; atest ConditionTest; manually verified exploit apk is OK
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Change-Id: Ic2fa8f06cc7a4c1f262115764fbd1be2a226b4b9
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Merged-In: Ic2fa8f06cc7a4c1f262115764fbd1be2a226b4b9
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(cherry picked from commit 81352c3775949c622441e10b468766441e35edc7)
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(cherry picked from commit 5cb217fff3bc7184bd776a9dc2991e7fce5e25bd)
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Merged-In: Ic2fa8f06cc7a4c1f262115764fbd1be2a226b4b9
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---
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.../service/notification/Condition.java | 38 +++++++++++++++++--
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1 file changed, 34 insertions(+), 4 deletions(-)
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diff --git a/core/java/android/service/notification/Condition.java b/core/java/android/service/notification/Condition.java
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index 447afe62fd1a..5f65d401600a 100644
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--- a/core/java/android/service/notification/Condition.java
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+++ b/core/java/android/service/notification/Condition.java
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@@ -94,6 +94,12 @@ public final class Condition implements Parcelable {
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@SystemApi
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public final int icon;
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+ /**
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+ * The maximum string length for any string contained in this condition.
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+ * @hide
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+ */
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+ public static final int MAX_STRING_LENGTH = 1000;
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+
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/**
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* An object representing the current state of a {@link android.app.AutomaticZenRule}.
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* @param id the {@link android.app.AutomaticZenRule#getConditionId()} of the zen rule
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@@ -109,16 +115,19 @@ public final class Condition implements Parcelable {
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if (id == null) throw new IllegalArgumentException("id is required");
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if (summary == null) throw new IllegalArgumentException("summary is required");
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if (!isValidState(state)) throw new IllegalArgumentException("state is invalid: " + state);
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- this.id = id;
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- this.summary = summary;
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- this.line1 = line1;
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- this.line2 = line2;
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+ this.id = getTrimmedUri(id);
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+ this.summary = getTrimmedString(summary);
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+ this.line1 = getTrimmedString(line1);
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+ this.line2 = getTrimmedString(line2);
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this.icon = icon;
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this.state = state;
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this.flags = flags;
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}
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public Condition(Parcel source) {
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+ // This constructor passes all fields directly into the constructor that takes all the
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+ // fields as arguments; that constructor will trim each of the input strings to
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+ // max length if necessary.
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this((Uri)source.readParcelable(Condition.class.getClassLoader()),
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source.readString(),
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source.readString(),
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@@ -234,4 +243,25 @@ public final class Condition implements Parcelable {
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return new Condition[size];
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}
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};
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+
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+ /**
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+ * Returns a truncated copy of the string if the string is longer than MAX_STRING_LENGTH.
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+ */
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+ private static String getTrimmedString(String input) {
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+ if (input != null && input.length() > MAX_STRING_LENGTH) {
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+ return input.substring(0, MAX_STRING_LENGTH);
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+ }
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+ return input;
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+ }
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+
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+ /**
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+ * Returns a truncated copy of the Uri by trimming the string representation to the maximum
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+ * string length.
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+ */
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+ private static Uri getTrimmedUri(Uri input) {
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+ if (input != null && input.toString().length() > MAX_STRING_LENGTH) {
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+ return Uri.parse(getTrimmedString(input.toString()));
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+ }
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+ return input;
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+ }
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}
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