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Fix invalid pointer dereference in wcpcpy_chk
The src pointer is const and points to a different object, so accessing dest via src is invalid. Reviewed-by: Florian Weimer <fweimer@redhat.com>
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@ -28,13 +28,12 @@ __wcpcpy_chk (wchar_t *dest, const wchar_t *src, size_t destlen)
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{
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wchar_t *wcp = (wchar_t *) dest - 1;
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wint_t c;
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const ptrdiff_t off = src - dest + 1;
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do
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{
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if (__glibc_unlikely (destlen-- == 0))
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__chk_fail ();
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c = wcp[off];
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c = *src++;
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*++wcp = c;
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}
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while (c != L'\0');
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