Linux sandbox: restrict clock_gettime() and clock_getres()

sandbox/linux/seccomp-bpf-helpers/baseline_policy.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "sandbox/linux/seccomp-bpf-helpers/baseline_policy.h"
 
 #include <errno.h>
 #include <sys/mman.h>
 #include <sys/socket.h>
 #include <sys/syscall.h>
@@ skipping 108 matching lines @@
   if (IsBaselinePolicyAllowed(sysno)) {
     return Allow();
   }
 
 #if defined(OS_ANDROID)
   // Needed for thread creation.
   if (sysno == __NR_sigaltstack)
     return Allow();
 #endif
 
+  if (sysno == __NR_clock_gettime) {
+    return RestrictClockID();
+  }
+
   if (sysno == __NR_clone) {
     return RestrictCloneToThreadsAndEPERMFork();
   }
 
   if (sysno == __NR_fcntl)
     return RestrictFcntlCommands();
 
 #if defined(__i386__) || defined(__arm__) || defined(__mips__)
   if (sysno == __NR_fcntl64)
     return RestrictFcntlCommands();
@@ skipping 108 matching lines @@
     DCHECK_EQ(syscall(__NR_getpid), current_pid_);
   }
   return EvaluateSyscallImpl(fs_denied_errno_, current_pid_, sysno);
 }
 
 ResultExpr BaselinePolicy::InvalidSyscall() const {
   return CrashSIGSYS();
 }
 
 }  // namespace sandbox.