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gobject: Add a missing NULL check for the return from lookup_type_node_I()

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This can cause a `NULL` dereference on the next line if there is no
`TypeNode` for `iface_type`, for example if `iface_type ==
G_TYPE_INVALID`.

Unlikely, but possible since this API is public.

Spotted by Coverity.

Signed-off-by: Philip Withnall <pwithnall@endlessos.org>

Coverity CID: #1501602
This commit is contained in:
Philip Withnall
2022-12-21 19:16:10 +00:00
parent 5e378c775a
commit 251bab3e71
2 changed files with 5 additions and 1 deletions
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4
gobject/tests/type-flags.c
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@@ -130,6 +130,8 @@ test_type_flags_final_instance_check (void)
TEST_TYPE_DEPRECATED));
g_assert_true (g_type_check_instance_is_a ((GTypeInstance *) final,
G_TYPE_OBJECT));
g_assert_false (g_type_check_instance_is_a ((GTypeInstance *) final,
G_TYPE_INVALID));
g_clear_object (&final);
}
@@ -184,6 +186,8 @@ test_type_flags_deprecated (void)
G_TYPE_OBJECT));
g_assert_false (g_type_check_instance_is_a ((GTypeInstance *) deprecated_object,
TEST_TYPE_FINAL));
g_assert_false (g_type_check_instance_is_a ((GTypeInstance *) deprecated_object,
G_TYPE_INVALID));
g_test_assert_expected_messages ();