diff mbox series

[01/11] Kernel: Set CONFIG_ARCH_MMAP_RND_BITS to 32 bits

Message ID	cb505ff6-5140-94ea-33ef-e2745a8d9629@ipfire.org
State	Accepted
Commit	26ca63592dab77d816a891ca5e8c8b530963e9ac
Headers	Message-ID: <cb505ff6-5140-94ea-33ef-e2745a8d9629@ipfire.org> Date: Sat, 19 Mar 2022 21:08:32 +0000 MIME-Version: 1.0 Subject: [PATCH 01/11] Kernel: Set CONFIG_ARCH_MMAP_RND_BITS to 32 bits Content-Language: en-US To: development@lists.ipfire.org References: <771528ff-9bb0-2073-4819-471ab16bb920@ipfire.org> From: =?utf-8?q?Peter_M=C3=BCller?= <peter.mueller@ipfire.org> In-Reply-To: <771528ff-9bb0-2073-4819-471ab16bb920@ipfire.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: list Errors-To: development-bounces@lists.ipfire.org Sender: "Development" <development-bounces@lists.ipfire.org>
Series	Kernel: Improve hardening \| [00/11] Kernel: Improve hardening [01/11] Kernel: Set CONFIG_ARCH_MMAP_RND_BITS to 32 bits [02/11] Kernel: Disable support for tracing block I/O actions [03/11] Kernel: Pin loading kernel files to one filesystem [04/11] Kernel: Enable undefined behaviour sanity checker [05/11] Kernel: Gate SETID transitions to limit CAP_SET(G\|U)ID capabilities [06/11] Kernel: Enable LSM support and set security level to "integrity" [07/11] Kernel: Trigger BUG if data corruption is detected [08/11] Kernel: Do not automatically load TTY line disciplines, only if necessary [09/11] Kernel: Enable SVA support for both Intel and AMD CPUs [10/11] Kernel: Disable function and stack tracers [11/11] Kernel: Update rootfile for x86_64

Commit Message

Peter Müller March 19, 2022, 9:08 p.m. UTC

  This follows a recommendation by ClipOS, making ASLR bypassing attempts
harder.

Signed-off-by: Peter Müller <peter.mueller@ipfire.org>
---
 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(-)

Comments

Michael Tremer March 23, 2022, 11:42 a.m. UTC | #1

I feel we have talked about this on multiple occasions, yet it never made its way into the repository.

Reviewed-by: Michael Tremer <michael.tremer@ipfire.org>

> On 19 Mar 2022, at 21:08, Peter Müller <peter.mueller@ipfire.org> wrote:
> 
> This follows a recommendation by ClipOS, making ASLR bypassing attempts
> harder.
> 
> Signed-off-by: Peter Müller <peter.mueller@ipfire.org>
> ---
> 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 6728fa7f3..4205aa5bc 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 d8482de92..ef36b8e22 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 73911b2ab..d8045c15c 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 0f322826e..b14815545 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
> -- 
> 2.34.1

diff mbox series

Patch

diff --git a/config/kernel/kernel.config.aarch64-ipfire b/config/kernel/kernel.config.aarch64-ipfire
index 6728fa7f3..4205aa5bc 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 d8482de92..ef36b8e22 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 73911b2ab..d8045c15c 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 0f322826e..b14815545 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