Akihiro Sagawa : quartz: Ensure error text is terminated with NUL character.
Alexandre Julliard
julliard at winehq.org
Fri May 31 15:53:31 CDT 2019
Module: wine
Branch: master
Commit: fc4ef8692e82b3e480b76daf088f099897a790e8
URL: https://source.winehq.org/git/wine.git/?a=commit;h=fc4ef8692e82b3e480b76daf088f099897a790e8
Author: Akihiro Sagawa <sagawa.aki at gmail.com>
Date: Thu May 30 22:58:09 2019 +0900
quartz: Ensure error text is terminated with NUL character.
Signed-off-by: Akihiro Sagawa <sagawa.aki at gmail.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>
---
dlls/quartz/main.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/dlls/quartz/main.c b/dlls/quartz/main.c
index 08287a7..282104e 100644
--- a/dlls/quartz/main.c
+++ b/dlls/quartz/main.c
@@ -313,7 +313,13 @@ DWORD WINAPI AMGetErrorTextA(HRESULT hr, LPSTR buffer, DWORD maxlen)
return 0;
res = AMGetErrorTextW(hr, errorW, ARRAY_SIZE(errorW));
- return WideCharToMultiByte(CP_ACP, 0, errorW, res, buffer, maxlen, 0, 0);
+ if (!res)
+ return 0;
+
+ res = WideCharToMultiByte(CP_ACP, 0, errorW, -1, NULL, 0, 0, 0);
+ if (res > maxlen || !res)
+ return 0;
+ return WideCharToMultiByte(CP_ACP, 0, errorW, -1, buffer, maxlen, 0, 0) - 1;
}
/***********************************************************************
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