[PATCH v3 1/2] ntdll: Refuse to start if wineserver is in wrong pid namespace

[Alfred Agrell]

From: Alfred Agrell

---
 dlls/ntdll/unix/server.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dlls/ntdll/unix/server.c b/dlls/ntdll/unix/server.c
index 258a959de72..1fb02aa4125 100644
--- a/dlls/ntdll/unix/server.c
+++ b/dlls/ntdll/unix/server.c
@@ -1655,6 +1655,10 @@ size_t server_init_process(void)
     /* work around Ubuntu's ptrace breakage */
     if (server_pid != -1) prctl( 0x59616d61 /* PR_SET_PTRACER */, server_pid );
 #endif
+    /* ensure wineserver exists in our pid namespace */
+    if (server_pid == 0)
+        fatal_error( "cannot determine wineserver's process ID.\n"
+                     "Is it running in wrong pid namespace?\n" );

/* ignore SIGPIPE so that we get an EPIPE error instead  */
     sig_act.sa_handler = SIG_IGN;