On Tue, 1 Sep 2020 18:00:16 +0200, Jessica Yu wrote:
> In the arm64 module linker script, the section .text.ftrace_trampoline
> is specified unconditionally regardless of whether CONFIG_DYNAMIC_FTRACE
> is enabled (this is simply due to the limitation that module linker
> scripts are not preprocessed like the vmlinux one).
>
> Normally, for .plt and .text.ftrace_trampoline, the section flags
> present in the module binary wouldn't matter since module_frob_arch_sections()
> would assign them manually anyway. However, the arm64 module loader only
> sets the section flags for .text.ftrace_trampoline when
> CONFIG_DYNAMIC_FTRACE=y.
> That's only become problematic recently due to a recent change in
> binutils-2.35, where the .text.ftrace_trampoline section (along with the
> .plt section) is now marked writable and executable (WAX).
>
> [...]
Applied to arm64 (for-next/fixes), thanks!
[1/1] arm64/module: set trampoline section flags regardless of
CONFIG_DYNAMIC_FTRACE
https://git.kernel.org/arm64/c/e0328feda79d
--
Catalin
