From: Michael Tremer <michael.tremer@ipfire.org>
To: development@lists.ipfire.org
Subject: Re: [PATCH 01/11] Kernel: Set CONFIG_ARCH_MMAP_RND_BITS to 32 bits
Date: Wed, 23 Mar 2022 11:42:34 +0000 [thread overview]
Message-ID: <CAA380DB-FF68-4E08-9BFD-6C0A658ABE48@ipfire.org> (raw)
In-Reply-To: <cb505ff6-5140-94ea-33ef-e2745a8d9629@ipfire.org>
[-- Attachment #1: Type: text/plain, Size: 3025 bytes --]
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(a)ipfire.org>
> On 19 Mar 2022, at 21:08, Peter Müller <peter.mueller(a)ipfire.org> wrote:
>
> This follows a recommendation by ClipOS, making ASLR bypassing attempts
> harder.
>
> Signed-off-by: Peter Müller <peter.mueller(a)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
next prev parent reply other threads:[~2022-03-23 11:42 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-19 21:08 [PATCH 00/11] Kernel: Improve hardening Peter Müller
2022-03-19 21:08 ` [PATCH 01/11] Kernel: Set CONFIG_ARCH_MMAP_RND_BITS to 32 bits Peter Müller
2022-03-23 11:42 ` Michael Tremer [this message]
2022-03-19 21:08 ` [PATCH 02/11] Kernel: Disable support for tracing block I/O actions Peter Müller
2022-03-23 11:44 ` Michael Tremer
2022-03-19 21:09 ` [PATCH 03/11] Kernel: Pin loading kernel files to one filesystem Peter Müller
2022-03-21 17:15 ` Arne Fitzenreiter
2022-03-21 18:50 ` Michael Tremer
2022-03-21 20:24 ` alf
2022-03-22 11:17 ` Michael Tremer
2022-03-19 21:09 ` [PATCH 04/11] Kernel: Enable undefined behaviour sanity checker Peter Müller
2022-03-23 11:45 ` Michael Tremer
2022-03-19 21:09 ` [PATCH 05/11] Kernel: Gate SETID transitions to limit CAP_SET(G|U)ID capabilities Peter Müller
2022-03-23 11:46 ` Michael Tremer
2022-03-19 21:10 ` [PATCH 06/11] Kernel: Enable LSM support and set security level to "integrity" Peter Müller
2022-03-23 17:50 ` Michael Tremer
2022-03-19 21:10 ` [PATCH 07/11] Kernel: Trigger BUG if data corruption is detected Peter Müller
2022-03-23 17:53 ` Michael Tremer
2022-03-19 21:10 ` [PATCH 08/11] Kernel: Do not automatically load TTY line disciplines, only if necessary Peter Müller
2022-03-23 17:54 ` Michael Tremer
2022-03-19 21:10 ` [PATCH 09/11] Kernel: Enable SVA support for both Intel and AMD CPUs Peter Müller
2022-03-23 17:54 ` Michael Tremer
2022-03-19 21:11 ` [PATCH 10/11] Kernel: Disable function and stack tracers Peter Müller
2022-03-23 17:56 ` Michael Tremer
2022-03-19 21:11 ` [PATCH 11/11] Kernel: Update rootfile for x86_64 Peter Müller
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