Sebastian Lackner : server: Fix crash when calling SetNamedPipeHandleState on partially closed pipe.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: ace9d329e9c1bae6a4d15d98482a67b802721348
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=ace9d329e9c1bae6a4d15d98482a67b802721348

Author: Sebastian Lackner <sebastian at fds-team.de>
Date:   Mon Nov 23 07:24:07 2015 +0100

server: Fix crash when calling SetNamedPipeHandleState on partially closed pipe.

Signed-off-by: Sebastian Lackner <sebastian at fds-team.de>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/kernel32/tests/pipe.c | 12 ++++++++++++
 server/named_pipe.c        |  6 +++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/dlls/kernel32/tests/pipe.c b/dlls/kernel32/tests/pipe.c
index 842376a..60336f8 100644
--- a/dlls/kernel32/tests/pipe.c
+++ b/dlls/kernel32/tests/pipe.c
@@ -1427,6 +1427,9 @@ static void test_CloseHandle(void)
 
     ret = GetNamedPipeHandleStateA(hfile, &state, NULL, NULL, NULL, NULL, 0);
     ok(ret, "GetNamedPipeHandleState failed with %u\n", GetLastError());
+    state = PIPE_READMODE_MESSAGE | PIPE_WAIT;
+    ret = SetNamedPipeHandleState(hfile, &state, NULL, NULL);
+    ok(ret, "SetNamedPipeHandleState failed with %u\n", GetLastError());
 
     SetLastError(0xdeadbeef);
     ret = ReadFile(hfile, buffer, 0, &numbytes, NULL);
@@ -1464,6 +1467,9 @@ static void test_CloseHandle(void)
 
     ret = GetNamedPipeHandleStateA(hfile, &state, NULL, NULL, NULL, NULL, 0);
     ok(ret, "GetNamedPipeHandleState failed with %u\n", GetLastError());
+    state = PIPE_READMODE_MESSAGE | PIPE_WAIT;
+    ret = SetNamedPipeHandleState(hfile, &state, NULL, NULL);
+    ok(ret, "SetNamedPipeHandleState failed with %u\n", GetLastError());
 
     SetLastError(0xdeadbeef);
     ret = ReadFile(hfile, buffer, 0, &numbytes, NULL);
@@ -1515,6 +1521,9 @@ static void test_CloseHandle(void)
 
     ret = GetNamedPipeHandleStateA(hpipe, &state, NULL, NULL, NULL, NULL, 0);
     ok(ret, "GetNamedPipeHandleState failed with %u\n", GetLastError());
+    state = PIPE_READMODE_MESSAGE | PIPE_WAIT;
+    ret = SetNamedPipeHandleState(hpipe, &state, NULL, NULL);
+    ok(ret, "SetNamedPipeHandleState failed with %u\n", GetLastError());
 
     SetLastError(0xdeadbeef);
     ret = ReadFile(hpipe, buffer, 0, &numbytes, NULL);
@@ -1552,6 +1561,9 @@ static void test_CloseHandle(void)
 
     ret = GetNamedPipeHandleStateA(hpipe, &state, NULL, NULL, NULL, NULL, 0);
     ok(ret, "GetNamedPipeHandleState failed with %u\n", GetLastError());
+    state = PIPE_READMODE_MESSAGE | PIPE_WAIT;
+    ret = SetNamedPipeHandleState(hpipe, &state, NULL, NULL);
+    ok(ret, "SetNamedPipeHandleState failed with %u\n", GetLastError());
 
     SetLastError(0xdeadbeef);
     ret = ReadFile(hpipe, buffer, 0, &numbytes, NULL);
diff --git a/server/named_pipe.c b/server/named_pipe.c
index 1c9143f..8d5753a 100644
--- a/server/named_pipe.c
+++ b/server/named_pipe.c
@@ -1046,7 +1046,11 @@ DECL_HANDLER(set_named_pipe_info)
         client = (struct pipe_client *)get_handle_obj( current->process, req->handle,
                                                        0, &pipe_client_ops );
         if (!client) return;
-        server = client->server;
+        if (!(server = client->server))
+        {
+            release_object( client );
+            return;
+        }
     }
 
     if ((req->flags & ~(NAMED_PIPE_MESSAGE_STREAM_READ | NAMED_PIPE_NONBLOCKING_MODE)) ||