From 26ca63592dab77d816a891ca5e8c8b530963e9ac Mon Sep 17 00:00:00 2001 From: =?utf8?q?Peter=20M=C3=BCller?= Date: Sat, 19 Mar 2022 21:08:32 +0000 Subject: [PATCH] Kernel: Set CONFIG_ARCH_MMAP_RND_BITS to 32 bits MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit This follows a recommendation by ClipOS, making ASLR bypassing attempts harder. Signed-off-by: Peter Müller Reviewed-by: Michael Tremer --- config/kernel/kernel.config.aarch64-ipfire | 2 +- config/kernel/kernel.config.armv6l-ipfire | 2 +- config/kernel/kernel.config.riscv64-ipfire | 2 +- config/kernel/kernel.config.x86_64-ipfire | 2 +- 4 files changed, 4 insertions(+), 4 deletions(-) diff --git a/config/kernel/kernel.config.aarch64-ipfire b/config/kernel/kernel.config.aarch64-ipfire index 6728fa7f35..4205aa5bc0 100644 --- a/config/kernel/kernel.config.aarch64-ipfire +++ b/config/kernel/kernel.config.aarch64-ipfire @@ -702,7 +702,7 @@ CONFIG_HAVE_MOD_ARCH_SPECIFIC=y CONFIG_MODULES_USE_ELF_RELA=y CONFIG_ARCH_HAS_ELF_RANDOMIZE=y CONFIG_HAVE_ARCH_MMAP_RND_BITS=y -CONFIG_ARCH_MMAP_RND_BITS=18 +CONFIG_ARCH_MMAP_RND_BITS=32 CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS=y CONFIG_ARCH_MMAP_RND_COMPAT_BITS=11 CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT=y diff --git a/config/kernel/kernel.config.armv6l-ipfire b/config/kernel/kernel.config.armv6l-ipfire index d8482de928..ef36b8e221 100644 --- a/config/kernel/kernel.config.armv6l-ipfire +++ b/config/kernel/kernel.config.armv6l-ipfire @@ -778,7 +778,7 @@ CONFIG_MODULES_USE_ELF_REL=y CONFIG_ARCH_HAS_ELF_RANDOMIZE=y CONFIG_HAVE_ARCH_MMAP_RND_BITS=y CONFIG_HAVE_EXIT_THREAD=y -CONFIG_ARCH_MMAP_RND_BITS=8 +CONFIG_ARCH_MMAP_RND_BITS=32 CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT=y CONFIG_CLONE_BACKWARDS=y CONFIG_OLD_SIGSUSPEND3=y diff --git a/config/kernel/kernel.config.riscv64-ipfire b/config/kernel/kernel.config.riscv64-ipfire index 73911b2ab9..d8045c15c9 100644 --- a/config/kernel/kernel.config.riscv64-ipfire +++ b/config/kernel/kernel.config.riscv64-ipfire @@ -388,7 +388,7 @@ CONFIG_HAVE_MOD_ARCH_SPECIFIC=y CONFIG_MODULES_USE_ELF_RELA=y CONFIG_ARCH_HAS_ELF_RANDOMIZE=y CONFIG_HAVE_ARCH_MMAP_RND_BITS=y -CONFIG_ARCH_MMAP_RND_BITS=18 +CONFIG_ARCH_MMAP_RND_BITS=32 CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT=y CONFIG_CLONE_BACKWARDS=y CONFIG_COMPAT_32BIT_TIME=y diff --git a/config/kernel/kernel.config.x86_64-ipfire b/config/kernel/kernel.config.x86_64-ipfire index 0f322826ee..b148155453 100644 --- a/config/kernel/kernel.config.x86_64-ipfire +++ b/config/kernel/kernel.config.x86_64-ipfire @@ -742,7 +742,7 @@ CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK=y CONFIG_ARCH_HAS_ELF_RANDOMIZE=y CONFIG_HAVE_ARCH_MMAP_RND_BITS=y CONFIG_HAVE_EXIT_THREAD=y -CONFIG_ARCH_MMAP_RND_BITS=28 +CONFIG_ARCH_MMAP_RND_BITS=32 CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS=y CONFIG_ARCH_MMAP_RND_COMPAT_BITS=8 CONFIG_HAVE_ARCH_COMPAT_MMAP_BASES=y -- 2.39.5