Merge "Remove unnecessary ASLR workaround" am: 93f5f96418 (cd21536c) · Commits · e / os / android_frameworks_base

core/jni/com_android_internal_os_Zygote.cpp

+0 −30

Original line number	Diff line number	Diff line
		@@ -62,7 +62,6 @@
		#include <sys/time.h>
		#include <sys/types.h>
		#include <sys/un.h>
		#include <sys/utsname.h>
		#include <sys/wait.h>
		#include <unistd.h>

		@@ -850,26 +849,6 @@ static void MountEmulatedStorage(uid_t uid, jint mount_mode,
		}
		}

		static bool NeedsNoRandomizeWorkaround() {
		#if !defined(__arm__)
		return false;
		#else
		int major;
		int minor;
		struct utsname uts;
		if (uname(&uts) == -1) {
		return false;
		}

		if (sscanf(uts.release, "%d.%d", &major, &minor) != 2) {
		return false;
		}

		// Kernels before 3.4.* need the workaround.
		return (major < 3) \|\| ((major == 3) && (minor < 4));
		#endif
		}

		// Utility to close down the Zygote socket file descriptors while
		// the child is still running as root with Zygote's privileges. Each
		// descriptor (if any) is closed via dup3(), replacing it with a valid
		@@ -1740,15 +1719,6 @@ static void SpecializeCommon(JNIEnv* env, uid_t uid, gid_t gid, jintArray gids,
		// runtime.
		runtime_flags &= ~RuntimeFlags::GWP_ASAN_LEVEL_MASK;

		if (NeedsNoRandomizeWorkaround()) {
		// Work around ARM kernel ASLR lossage (http://b/5817320).
		int old_personality = personality(0xffffffff);
		int new_personality = personality(old_personality \| ADDR_NO_RANDOMIZE);
		if (new_personality == -1) {
		ALOGW("personality(%d) failed: %s", new_personality, strerror(errno));
		}
		}

		SetCapabilities(permitted_capabilities, effective_capabilities, permitted_capabilities,
		fail_fn);