[PATCH v2 1/1] ucrtbase/tests: Avoid reading behind buffer in test_swprintf (ASan).

[Bernhard Übelacker]

From: Bernhard Übelacker

---
 dlls/ucrtbase/tests/printf.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/dlls/ucrtbase/tests/printf.c b/dlls/ucrtbase/tests/printf.c
index 75bd7830869..16dd4f3727b 100644
--- a/dlls/ucrtbase/tests/printf.c
+++ b/dlls/ucrtbase/tests/printf.c
@@ -193,7 +193,7 @@ static void test_swprintf (void)
         const int n        = vswprintf_wrapper (_CRT_INTERNAL_PRINTF_LEGACY_VSPRINTF_NULL_TERMINATION, buffer, bufsiz, fmt);
         const int valid    = n < 0 ? bufsiz : (n == bufsiz ? n : n+1);

-        WideCharToMultiByte (CP_ACP, 0, buffer, -1, narrow, sizeof(narrow), NULL, NULL);
+        WideCharToMultiByte (CP_ACP, 0, buffer, valid, narrow, sizeof(narrow), NULL, NULL);
         WideCharToMultiByte (CP_ACP, 0, fmt, -1, narrow_fmt, sizeof(narrow_fmt), NULL, NULL);
         ok (n == expect, ""%s": expected %d, returned %d\n",
             narrow_fmt, expect, n);
@@ -208,7 +208,7 @@ static void test_swprintf (void)
         const int n        = vswprintf_wrapper (_CRT_INTERNAL_PRINTF_STANDARD_SNPRINTF_BEHAVIOR, buffer, bufsiz, fmt);
         const int valid    = n >= bufsiz ? bufsiz - 1 : n < 0 ? 0 : n;

-        WideCharToMultiByte (CP_ACP, 0, buffer, -1, narrow, sizeof(narrow), NULL, NULL);
+        WideCharToMultiByte (CP_ACP, 0, buffer, valid, narrow, sizeof(narrow), NULL, NULL);
         WideCharToMultiByte (CP_ACP, 0, fmt, -1, narrow_fmt, sizeof(narrow_fmt), NULL, NULL);
         ok (n == expect, ""%s": expected %d, returned %d\n",
             narrow_fmt, expect, n);
@@ -225,7 +225,7 @@ static void test_swprintf (void)
         const int n        = vswprintf_wrapper (0, buffer, bufsiz, fmt);
         const int valid    = n < 0 ? bufsiz - 1 : n;

-        WideCharToMultiByte (CP_ACP, 0, buffer, -1, narrow, sizeof(narrow), NULL, NULL);
+        WideCharToMultiByte (CP_ACP, 0, buffer, valid, narrow, sizeof(narrow), NULL, NULL);
         WideCharToMultiByte (CP_ACP, 0, fmt, -1, narrow_fmt, sizeof(narrow_fmt), NULL, NULL);
         ok (n == expect, ""%s": expected %d, returned %d\n",
             narrow_fmt, expect, n);