reg: Avoid allocating zero bytes of memory when handling REG_BINARY data.

Signed-off-by: Hugh McMaster <hugh.mcmaster@outlook.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

reg: Avoid allocating zero bytes of memory when handling REG_BINARY data.
1dd785d1 · Hugh McMaster · Alexandre Julliard · e2dfb0af · 1dd785d1
Commit 1dd785d1 authored May 06, 2021 by Hugh McMaster Committed by Alexandre Julliard May 06, 2021
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add.c programs/reg/add.c +2 -0

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--- a/programs/reg/add.c
+++ b/programs/reg/add.c
@@ -89,6 +89,8 @@ static BOOL get_regdata(const WCHAR *data, DWORD reg_type, WCHAR separator,
            BYTE hex0, hex1, *ptr;
            int i = 0, destByteIndex = 0, datalen = lstrlenW(data);

+            if (!datalen) return TRUE;
+
            *size_bytes = ((datalen + datalen % 2) / 2) * sizeof(BYTE);
            *data_bytes = malloc(*size_bytes);