* [PATCH] init/Kconfig: Remove USELIB syscall by default
@ 2022-04-12 21:25 Kees Cook
2022-04-12 21:48 ` Nathan Chancellor
0 siblings, 1 reply; 2+ messages in thread
From: Kees Cook @ 2022-04-12 21:25 UTC (permalink / raw)
To: Nathan Chancellor, Andrew Morton
Cc: Kees Cook, Masahiro Yamada, x86, linux-arch, linux-kernel,
linux-hardening
The uselib syscall has been long deprecated. There's no need to keep
this enabled by default under X86_32.
Signed-off-by: Kees Cook <keescook@chromium.org>
---
init/Kconfig | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/init/Kconfig b/init/Kconfig
index ddcbefe535e9..5cddb9ba0eef 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -435,8 +435,8 @@ config CROSS_MEMORY_ATTACH
See the man page for more details.
config USELIB
- bool "uselib syscall"
- def_bool ALPHA || M68K || SPARC || X86_32 || IA32_EMULATION
+ bool "uselib syscall (for libc5 and earlier)"
+ default ALPHA || M68K || SPARC
help
This option enables the uselib syscall, a system call used in the
dynamic linker from libc5 and earlier. glibc does not use this
--
2.32.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] init/Kconfig: Remove USELIB syscall by default
2022-04-12 21:25 [PATCH] init/Kconfig: Remove USELIB syscall by default Kees Cook
@ 2022-04-12 21:48 ` Nathan Chancellor
0 siblings, 0 replies; 2+ messages in thread
From: Nathan Chancellor @ 2022-04-12 21:48 UTC (permalink / raw)
To: Kees Cook
Cc: Andrew Morton, Masahiro Yamada, x86, linux-arch, linux-kernel,
linux-hardening
On Tue, Apr 12, 2022 at 02:25:20PM -0700, Kees Cook wrote:
> The uselib syscall has been long deprecated. There's no need to keep
> this enabled by default under X86_32.
>
> Signed-off-by: Kees Cook <keescook@chromium.org>
The 'bool "" + def_bool' was weird and I had to look up what libc5 even
was :)
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
> ---
> init/Kconfig | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/init/Kconfig b/init/Kconfig
> index ddcbefe535e9..5cddb9ba0eef 100644
> --- a/init/Kconfig
> +++ b/init/Kconfig
> @@ -435,8 +435,8 @@ config CROSS_MEMORY_ATTACH
> See the man page for more details.
>
> config USELIB
> - bool "uselib syscall"
> - def_bool ALPHA || M68K || SPARC || X86_32 || IA32_EMULATION
> + bool "uselib syscall (for libc5 and earlier)"
> + default ALPHA || M68K || SPARC
> help
> This option enables the uselib syscall, a system call used in the
> dynamic linker from libc5 and earlier. glibc does not use this
> --
> 2.32.0
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2022-04-12 21:25 [PATCH] init/Kconfig: Remove USELIB syscall by default Kees Cook
2022-04-12 21:48 ` Nathan Chancellor
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