regedit: Don't crash if REG_SZ is empty.

Signed-off-by: Fabian Maurer <dark.shadow4@web.de> Signed-off-by: Hugh McMaster <hugh.mcmaster@outlook.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

regedit: Don't crash if REG_SZ is empty.
8e9a469e · Fabian Maurer · Alexandre Julliard · 84d2d781 · 8e9a469e
Commit 8e9a469e authored Oct 02, 2017 by Fabian Maurer Committed by Alexandre Julliard Oct 02, 2017
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regproc.c programs/regedit/regproc.c +3 -2

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--- a/programs/regedit/regproc.c
+++ b/programs/regedit/regproc.c
@@ -1243,11 +1243,12 @@ static size_t export_value_name(FILE *fp, WCHAR *name, size_t len, BOOL unicode)

 static void export_string_data(WCHAR **buf, WCHAR *data, size_t size)
 {
-    size_t len, line_len;
+    size_t len = 0, line_len;
    WCHAR *str;
    static const WCHAR fmt[] = {'"','%','s','"',0};

-    len = size / sizeof(WCHAR) - 1;
+    if (size)
+        len = size / sizeof(WCHAR) - 1;
    str = REGPROC_escape_string(data, len, &line_len);
    *buf = heap_xalloc((line_len + 3) * sizeof(WCHAR));
    sprintfW(*buf, fmt, str);