msvcrt: Fix buffer overflow in _get_tzname.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=46481Signed-off-by: Piotr Caban <piotr@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

msvcrt: Fix buffer overflow in _get_tzname.
79188582 · Piotr Caban · Alexandre Julliard · 358fb2f4 · 79188582
Commit 79188582 authored Feb 27, 2019 by Piotr Caban Committed by Alexandre Julliard Feb 27, 2019
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time.c dlls/msvcrt/time.c +5 -0

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--- a/dlls/msvcrt/time.c
+++ b/dlls/msvcrt/time.c
@@ -939,6 +939,11 @@ int CDECL MSVCRT__get_tzname(MSVCRT_size_t *ret, char *buf, MSVCRT_size_t bufsiz
    *ret = strlen(timezone)+1;
    if(!buf && !bufsize)
        return 0;
+    if(*ret > bufsize)
+    {
+        buf[0] = 0;
+        return MSVCRT_ERANGE;
+    }

    strcpy(buf, timezone);
    return 0;