From: Michael Tremer <michael.tremer@ipfire.org>
To: development@lists.ipfire.org
Subject: Re: [PATCH 04/11] Kernel: Enable undefined behaviour sanity checker
Date: Wed, 23 Mar 2022 11:45:19 +0000 [thread overview]
Message-ID: <4B728932-3A62-4AD4-AF09-0C1CE4C8B65B@ipfire.org> (raw)
In-Reply-To: <2f4432a0-6b08-9f0e-780c-e86aedfa4969@ipfire.org>
[-- Attachment #1: Type: text/plain, Size: 4207 bytes --]
Hello,
The documentation for this says that CONFIG_UBSAN_SANITIZE_ALL will massively increase the size of the kernel.
How much is this? A larger kernel generally means slower execution. Did you perform any benchmarks?
> On 19 Mar 2022, at 21:09, Peter Müller <peter.mueller(a)ipfire.org> wrote:
>
> Signed-off-by: Peter Müller <peter.mueller(a)ipfire.org>
> ---
> config/kernel/kernel.config.aarch64-ipfire | 13 ++++++++++++-
> config/kernel/kernel.config.armv6l-ipfire | 13 ++++++++++++-
> config/kernel/kernel.config.riscv64-ipfire | 13 ++++++++++++-
> config/kernel/kernel.config.x86_64-ipfire | 13 ++++++++++++-
> 4 files changed, 48 insertions(+), 4 deletions(-)
>
> diff --git a/config/kernel/kernel.config.aarch64-ipfire b/config/kernel/kernel.config.aarch64-ipfire
> index d9179c061..b2ef43e51 100644
> --- a/config/kernel/kernel.config.aarch64-ipfire
> +++ b/config/kernel/kernel.config.aarch64-ipfire
> @@ -8008,7 +8008,18 @@ CONFIG_DEBUG_FS_ALLOW_ALL=y
> CONFIG_HAVE_ARCH_KGDB=y
> # CONFIG_KGDB is not set
> CONFIG_ARCH_HAS_UBSAN_SANITIZE_ALL=y
> -# CONFIG_UBSAN is not set
> +CONFIG_UBSAN=y
> +# CONFIG_UBSAN_TRAP is not set
> +CONFIG_CC_HAS_UBSAN_BOUNDS=y
> +CONFIG_UBSAN_BOUNDS=y
> +CONFIG_UBSAN_ONLY_BOUNDS=y
> +CONFIG_UBSAN_SHIFT=y
> +# CONFIG_UBSAN_DIV_ZERO is not set
> +CONFIG_UBSAN_BOOL=y
> +CONFIG_UBSAN_ENUM=y
> +# CONFIG_UBSAN_ALIGNMENT is not set
> +CONFIG_UBSAN_SANITIZE_ALL=y
> +# CONFIG_TEST_UBSAN is not set
> CONFIG_HAVE_KCSAN_COMPILER=y
> # end of Generic Kernel Debugging Instruments
>
> diff --git a/config/kernel/kernel.config.armv6l-ipfire b/config/kernel/kernel.config.armv6l-ipfire
> index 522278160..13326a29c 100644
> --- a/config/kernel/kernel.config.armv6l-ipfire
> +++ b/config/kernel/kernel.config.armv6l-ipfire
> @@ -7989,7 +7989,18 @@ CONFIG_DEBUG_FS_ALLOW_ALL=y
> # CONFIG_DEBUG_FS_ALLOW_NONE is not set
> CONFIG_HAVE_ARCH_KGDB=y
> # CONFIG_KGDB is not set
> -# CONFIG_UBSAN is not set
> +CONFIG_UBSAN=y
> +# CONFIG_UBSAN_TRAP is not set
> +CONFIG_CC_HAS_UBSAN_BOUNDS=y
> +CONFIG_UBSAN_BOUNDS=y
> +CONFIG_UBSAN_ONLY_BOUNDS=y
> +CONFIG_UBSAN_SHIFT=y
> +# CONFIG_UBSAN_DIV_ZERO is not set
> +CONFIG_UBSAN_BOOL=y
> +CONFIG_UBSAN_ENUM=y
> +# CONFIG_UBSAN_ALIGNMENT is not set
> +CONFIG_UBSAN_SANITIZE_ALL=y
> +# CONFIG_TEST_UBSAN is not set
> CONFIG_HAVE_KCSAN_COMPILER=y
> # end of Generic Kernel Debugging Instruments
>
> diff --git a/config/kernel/kernel.config.riscv64-ipfire b/config/kernel/kernel.config.riscv64-ipfire
> index ebb830eb7..fa4ee46fa 100644
> --- a/config/kernel/kernel.config.riscv64-ipfire
> +++ b/config/kernel/kernel.config.riscv64-ipfire
> @@ -6597,7 +6597,18 @@ CONFIG_HAVE_ARCH_KGDB=y
> CONFIG_HAVE_ARCH_KGDB_QXFER_PKT=y
> # CONFIG_KGDB is not set
> CONFIG_ARCH_HAS_UBSAN_SANITIZE_ALL=y
> -# CONFIG_UBSAN is not set
> +CONFIG_UBSAN=y
> +# CONFIG_UBSAN_TRAP is not set
> +CONFIG_CC_HAS_UBSAN_BOUNDS=y
> +CONFIG_UBSAN_BOUNDS=y
> +CONFIG_UBSAN_ONLY_BOUNDS=y
> +CONFIG_UBSAN_SHIFT=y
> +# CONFIG_UBSAN_DIV_ZERO is not set
> +CONFIG_UBSAN_BOOL=y
> +CONFIG_UBSAN_ENUM=y
> +# CONFIG_UBSAN_ALIGNMENT is not set
> +CONFIG_UBSAN_SANITIZE_ALL=y
> +# CONFIG_TEST_UBSAN is not set
> CONFIG_HAVE_KCSAN_COMPILER=y
> # end of Generic Kernel Debugging Instruments
>
> diff --git a/config/kernel/kernel.config.x86_64-ipfire b/config/kernel/kernel.config.x86_64-ipfire
> index 675c3ce1e..e6a03a9e5 100644
> --- a/config/kernel/kernel.config.x86_64-ipfire
> +++ b/config/kernel/kernel.config.x86_64-ipfire
> @@ -7430,7 +7430,18 @@ CONFIG_DEBUG_FS_ALLOW_ALL=y
> CONFIG_HAVE_ARCH_KGDB=y
> # CONFIG_KGDB is not set
> CONFIG_ARCH_HAS_UBSAN_SANITIZE_ALL=y
> -# CONFIG_UBSAN is not set
> +CONFIG_UBSAN=y
> +# CONFIG_UBSAN_TRAP is not set
> +CONFIG_CC_HAS_UBSAN_BOUNDS=y
> +CONFIG_UBSAN_BOUNDS=y
> +CONFIG_UBSAN_ONLY_BOUNDS=y
> +CONFIG_UBSAN_SHIFT=y
> +# CONFIG_UBSAN_DIV_ZERO is not set
> +CONFIG_UBSAN_BOOL=y
> +CONFIG_UBSAN_ENUM=y
> +# CONFIG_UBSAN_ALIGNMENT is not set
> +CONFIG_UBSAN_SANITIZE_ALL=y
> +# CONFIG_TEST_UBSAN is not set
> CONFIG_HAVE_ARCH_KCSAN=y
> CONFIG_HAVE_KCSAN_COMPILER=y
> # CONFIG_KCSAN is not set
> --
> 2.34.1
next prev parent reply other threads:[~2022-03-23 11:45 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
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 [this message]
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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