diff --git sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc
index 68ce32a..bb779c2 100644
--- sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc
+++ sandbox/linux/seccomp-bpf-helpers/syscall_parameters_restrictions.cc
@@ -137,23 +137,13 @@ namespace sandbox {
 // CLONE_VM, nor CLONE_THREAD, which includes all fork() implementations.
 ResultExpr RestrictCloneToThreadsAndEPERMFork() {
   const Arg<unsigned long> flags(0);
+  const int required = CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND |
+                       CLONE_THREAD | CLONE_SYSVSEM;
+  const int safe = CLONE_SETTLS | CLONE_PARENT_SETTID | CLONE_CHILD_CLEARTID |
+                   CLONE_DETACHED;
+  const BoolExpr thread_clone_ok = (flags&~safe)==required;
 
-  // TODO(mdempsky): Extend DSL to support (flags & ~mask1) == mask2.
-  const uint64_t kAndroidCloneMask = CLONE_VM | CLONE_FS | CLONE_FILES |
-                                     CLONE_SIGHAND | CLONE_THREAD |
-                                     CLONE_SYSVSEM;
-  const uint64_t kObsoleteAndroidCloneMask = kAndroidCloneMask | CLONE_DETACHED;
-
-  const uint64_t kGlibcPthreadFlags =
-      CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND | CLONE_THREAD |
-      CLONE_SYSVSEM | CLONE_SETTLS | CLONE_PARENT_SETTID | CLONE_CHILD_CLEARTID;
-  const BoolExpr glibc_test = flags == kGlibcPthreadFlags;
-
-  const BoolExpr android_test =
-      AnyOf(flags == kAndroidCloneMask, flags == kObsoleteAndroidCloneMask,
-            flags == kGlibcPthreadFlags);
-
-  return If(IsAndroid() ? android_test : glibc_test, Allow())
+  return If(thread_clone_ok, Allow())
       .ElseIf((flags & (CLONE_VM | CLONE_THREAD)) == 0, Error(EPERM))
       .Else(CrashSIGSYSClone());
 }
diff --git sandbox/linux/seccomp-bpf-helpers/syscall_sets.cc sandbox/linux/seccomp-bpf-helpers/syscall_sets.cc
index 7dbcc87..782be78 100644
--- sandbox/linux/seccomp-bpf-helpers/syscall_sets.cc
+++ sandbox/linux/seccomp-bpf-helpers/syscall_sets.cc
@@ -391,6 +391,7 @@ bool SyscallSets::IsAllowedProcessStartOrDeath(int sysno) {
 #if defined(__i386__)
     case __NR_waitpid:
 #endif
+    case __NR_set_tid_address:
       return true;
     case __NR_clone:  // Should be parameter-restricted.
     case __NR_setns:  // Privileged.
@@ -403,7 +404,6 @@ bool SyscallSets::IsAllowedProcessStartOrDeath(int sysno) {
 #if defined(__i386__) || defined(__x86_64__) || defined(__mips__)
     case __NR_set_thread_area:
 #endif
-    case __NR_set_tid_address:
     case __NR_unshare:
 #if !defined(__mips__) && !defined(__aarch64__)
     case __NR_vfork:
@@ -513,6 +513,8 @@ bool SyscallSets::IsAllowedAddressSpaceAccess(int sysno) {
     case __NR_mlock:
     case __NR_munlock:
     case __NR_munmap:
+    case __NR_mremap:
+    case __NR_membarrier:
       return true;
     case __NR_madvise:
     case __NR_mincore:
@@ -530,7 +532,6 @@ bool SyscallSets::IsAllowedAddressSpaceAccess(int sysno) {
     case __NR_modify_ldt:
 #endif
     case __NR_mprotect:
-    case __NR_mremap:
     case __NR_msync:
     case __NR_munlockall:
     case __NR_readahead:
diff --git sandbox/linux/system_headers/arm64_linux_syscalls.h sandbox/linux/system_headers/arm64_linux_syscalls.h
index 59d0eab..7ae7002 100644
--- sandbox/linux/system_headers/arm64_linux_syscalls.h
+++ sandbox/linux/system_headers/arm64_linux_syscalls.h
@@ -1063,4 +1063,8 @@
 #define __NR_memfd_create 279
 #endif
 
+#if !defined(__NR_membarrier)
+#define __NR_membarrier 283
+#endif
+
 #endif  // SANDBOX_LINUX_SYSTEM_HEADERS_ARM64_LINUX_SYSCALLS_H_
diff --git sandbox/linux/system_headers/arm_linux_syscalls.h sandbox/linux/system_headers/arm_linux_syscalls.h
index 1addd53..7843b5e 100644
--- sandbox/linux/system_headers/arm_linux_syscalls.h
+++ sandbox/linux/system_headers/arm_linux_syscalls.h
@@ -1385,6 +1385,10 @@
 #define __NR_memfd_create (__NR_SYSCALL_BASE+385)
 #endif
 
+#if !defined(__NR_membarrier)
+#define __NR_membarrier (__NR_SYSCALL_BASE+389)
+#endif
+
 // ARM private syscalls.
 #if !defined(__ARM_NR_BASE)
 #define __ARM_NR_BASE (__NR_SYSCALL_BASE + 0xF0000)
diff --git sandbox/linux/system_headers/mips64_linux_syscalls.h sandbox/linux/system_headers/mips64_linux_syscalls.h
index ec75815..612fcfa 100644
--- sandbox/linux/system_headers/mips64_linux_syscalls.h
+++ sandbox/linux/system_headers/mips64_linux_syscalls.h
@@ -1271,4 +1271,8 @@
 #define __NR_memfd_create (__NR_Linux + 314)
 #endif
 
+#if !defined(__NR_membarrier)
+#define __NR_membarrier (__NR_Linux + 318)
+#endif
+
 #endif  // SANDBOX_LINUX_SYSTEM_HEADERS_MIPS64_LINUX_SYSCALLS_H_
diff --git sandbox/linux/system_headers/mips_linux_syscalls.h sandbox/linux/system_headers/mips_linux_syscalls.h
index ddbf97f..1742acd 100644
--- sandbox/linux/system_headers/mips_linux_syscalls.h
+++ sandbox/linux/system_headers/mips_linux_syscalls.h
@@ -1433,4 +1433,8 @@
 #define __NR_memfd_create (__NR_Linux + 354)
 #endif
 
+#if !defined(__NR_membarrier)
+#define __NR_membarrier (__NR_Linux + 358)
+#endif
+
 #endif  // SANDBOX_LINUX_SYSTEM_HEADERS_MIPS_LINUX_SYSCALLS_H_
diff --git sandbox/linux/system_headers/x86_32_linux_syscalls.h sandbox/linux/system_headers/x86_32_linux_syscalls.h
index a6afc62..7ed0a3b 100644
--- sandbox/linux/system_headers/x86_32_linux_syscalls.h
+++ sandbox/linux/system_headers/x86_32_linux_syscalls.h
@@ -1422,5 +1422,9 @@
 #define __NR_memfd_create 356
 #endif
 
+#if !defined(__NR_membarrier)
+#define __NR_membarrier 375
+#endif
+
 #endif  // SANDBOX_LINUX_SYSTEM_HEADERS_X86_32_LINUX_SYSCALLS_H_
 
diff --git sandbox/linux/system_headers/x86_64_linux_syscalls.h sandbox/linux/system_headers/x86_64_linux_syscalls.h
index 349504a..ea3c7c9 100644
--- sandbox/linux/system_headers/x86_64_linux_syscalls.h
+++ sandbox/linux/system_headers/x86_64_linux_syscalls.h
@@ -1290,5 +1290,9 @@
 #define __NR_memfd_create 319
 #endif
 
+#if !defined(__NR_membarrier)
+#define __NR_membarrier 324
+#endif
+
 #endif  // SANDBOX_LINUX_SYSTEM_HEADERS_X86_64_LINUX_SYSCALLS_H_