[reactos] 01/01: [POWRPROF] EnumPwrSchemes: Fix callback string lengths

[Eric Kohl]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=eabae983e02f838b8303c…

commit eabae983e02f838b8303ca3241f6c80924ca6e46
Author:     Eric Kohl <eric.kohl(a)reactos.org>
AuthorDate: Mon Apr 22 00:41:24 2019 +0200
Commit:     Eric Kohl <eric.kohl(a)reactos.org>
CommitDate: Mon Apr 22 00:44:47 2019 +0200

    [POWRPROF] EnumPwrSchemes: Fix callback string lengths
    
    The callback routine should get the real lengths of the name and description strings
in bytes instead of the buffer sizes in characters. This fixes buffer overflows in
powercfg.cpl.
---
 dll/win32/powrprof/powrprof.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dll/win32/powrprof/powrprof.c b/dll/win32/powrprof/powrprof.c
index 672c8324ca..d176c2ae04 100644
--- a/dll/win32/powrprof/powrprof.c
+++ b/dll/win32/powrprof/powrprof.c
@@ -265,7 +265,7 @@ EnumPwrSchemes(PWRSCHEMESENUMPROC lpfnPwrSchemesEnumProc,
         memcpy(&PwrPolicy.user, &userPwrPolicy, sizeof(USER_POWER_POLICY));
         memcpy(&PwrPolicy.mach, &machinePwrPolicy,
sizeof(MACHINE_POWER_POLICY));
 
-        if (!lpfnPwrSchemesEnumProc(_wtoi(szNum), dwNameSize, szName, dwDescSize, szDesc,
&PwrPolicy, lParam))
+        if (!lpfnPwrSchemesEnumProc(_wtoi(szNum), (wcslen(szName) + 1) * sizeof(WCHAR),
szName, (wcslen(szDesc) + 1) * sizeof(WCHAR), szDesc, &PwrPolicy, lParam))
             goto cleanup;
         else
             bRet = TRUE;