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authorArun Chandran <achandran@mvista.com>2014-10-10 15:31:24 +0400
committerCatalin Marinas <catalin.marinas@arm.com>2014-10-24 18:47:49 +0400
commit92980405f3537136b8e81007a9df576762f49bbb (patch)
treea40d98e18e154c3d04e673842864812e14425c08 /arch/arm64/Kconfig
parente2b6b35ee77522c2e15e770aded0b05c25ca0616 (diff)
downloadlinux-92980405f3537136b8e81007a9df576762f49bbb.tar.xz
arm64: ASLR: Don't randomise text when randomise_va_space == 0
When user asks to turn off ASLR by writing "0" to /proc/sys/kernel/randomize_va_space there should not be any randomization to mmap base, stack, VDSO, libs, text and heap Currently arm64 violates this behavior by randomising text. Fix this by defining a constant ELF_ET_DYN_BASE. The randomisation of mm->mmap_base is done by setup_new_exec -> arch_pick_mmap_layout -> mmap_base -> mmap_rnd. Signed-off-by: Arun Chandran <achandran@mvista.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig')
-rw-r--r--arch/arm64/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index b8053be1d803..9532f8d5857e 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -1,5 +1,6 @@
config ARM64
def_bool y
+ select ARCH_BINFMT_ELF_RANDOMIZE_PIE
select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
select ARCH_HAS_SG_CHAIN
select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST