Rob Shearman : rpcrt4: Don' t copy memory from the buffer in NdrConformantStringUnmarshall if we just pointed the memory pointer into the buffer .

[Alexandre Julliard]

Module: wine
Branch: master
Commit: b9c92e95642325c99f83b4c2cbb610a5b01a47e3
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=b9c92e95642325c99f83b4c2cbb610a5b01a47e3

Author: Rob Shearman <rob at codeweavers.com>
Date:   Mon Dec 17 18:20:34 2007 +0000

rpcrt4: Don't copy memory from the buffer in NdrConformantStringUnmarshall if we just pointed the memory pointer into the buffer.

(Reported by Dan Kegel.)

---

 dlls/rpcrt4/ndr_marshall.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/dlls/rpcrt4/ndr_marshall.c b/dlls/rpcrt4/ndr_marshall.c
index 2de650d..ca40bfa 100644
--- a/dlls/rpcrt4/ndr_marshall.c
+++ b/dlls/rpcrt4/ndr_marshall.c
@@ -890,7 +890,8 @@ unsigned char *WINAPI NdrConformantStringUnmarshall( PMIDL_STUB_MESSAGE pStubMsg
       *ppMemory = NdrAllocate(pStubMsg, memsize);
   }
 
-  safe_copy_from_buffer(pStubMsg, *ppMemory, bufsize);
+  if (*ppMemory != pStubMsg->Buffer)
+    safe_copy_from_buffer(pStubMsg, *ppMemory, bufsize);
 
   if (*pFormat == RPC_FC_C_CSTRING) {
     TRACE("string=%s\n", debugstr_a((char*)*ppMemory));