Blame SOURCES/0017-QQmlJs-FixedPoolArray-fix-UB-precondition-violation-.patch
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From c6e595e7fbbe80c8db7ae33d8af05a4fd946a2f5 Mon Sep 17 00:00:00 2001
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From: Marc Mutz <marc.mutz@qt.io>
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Date: Tue, 21 Dec 2021 09:20:17 +0100
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Subject: [PATCH 17/20] QQmlJs::FixedPoolArray: fix UB (precondition violation)
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in allocate()
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Says ubsan:
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qqmljsfixedpoolarray_p.h:90:19: runtime error: null pointer passed as argument 2, which is declared to never be null
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Fix, like in so many other places, by a size check.
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Pick-to: 6.3 6.2 5.15
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Change-Id: I9181d6ecb467c2dc726978ce7f93b35a6bf2f944
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Reviewed-by: Lars Knoll <lars.knoll@qt.io>
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(cherry picked from commit d74e931f3fc2587ac6d1e2930acbbe54ea5be2b5)
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---
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src/qml/common/qqmljsfixedpoolarray_p.h | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/qml/common/qqmljsfixedpoolarray_p.h b/src/qml/common/qqmljsfixedpoolarray_p.h
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index b65b994d6c..15a8cd6878 100644
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--- a/src/qml/common/qqmljsfixedpoolarray_p.h
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+++ b/src/qml/common/qqmljsfixedpoolarray_p.h
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@@ -86,7 +86,7 @@ public:
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if (QTypeInfo<T>::isComplex) {
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for (int i = 0; i < count; ++i)
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new (data + i) T(vector.at(i));
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- } else {
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+ } else if (count) {
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memcpy(data, static_cast<const void*>(vector.constData()), count * sizeof(T));
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}
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}
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--
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2.35.1
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