37 lines
1.2 KiB
Diff
37 lines
1.2 KiB
Diff
From d8a0dcb11e92d3237f5f4e90a4916df518bdc53d Mon Sep 17 00:00:00 2001
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From: Matthias Clasen <mclasen@redhat.com>
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Date: Sun, 6 Jan 2019 14:17:30 -0500
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Subject: [PATCH 441/682] list store: Fix overflow issues
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Check for over- and underflow when manipulating positions.
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This makes the sequence
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g_list_model_get_item (store, 0);
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g_list_model_get_item (store, -1u);
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return NULL for the second call, as it should.
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Closes: #1639
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---
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gio/gliststore.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/gio/gliststore.c b/gio/gliststore.c
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index ae8e2c1d8..8d87159d5 100644
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--- a/gio/gliststore.c
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+++ b/gio/gliststore.c
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@@ -181,9 +181,9 @@ g_list_store_get_item (GListModel *list,
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if (store->last_position != -1u)
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{
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- if (store->last_position == position + 1)
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+ if (position < G_MAXUINT && store->last_position == position + 1)
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it = g_sequence_iter_prev (store->last_iter);
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- else if (store->last_position == position - 1)
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+ else if (position > 0 && store->last_position == position - 1)
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it = g_sequence_iter_next (store->last_iter);
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else if (store->last_position == position)
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it = store->last_iter;
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--
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2.19.1
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