Re: [PATCH v8 03/14] kasan: Fix inline mode for x86 tag-based mode

[Andrey Ryabinin <ryabinin.a.a@gmail.com>]

On 1/12/26 6:27 PM, Maciej Wieczor-Retman wrote:
> From: Maciej Wieczor-Retman <maciej.wieczor-retman@intel.com>
> 
> The LLVM compiler uses hwasan-instrument-with-calls parameter to setup
> inline or outline mode in tag-based KASAN. If zeroed, it means the
> instrumentation implementation will be pasted into each relevant
> location along with KASAN related constants during compilation. If set
> to one all function instrumentation will be done with function calls
> instead.
> 
> The default hwasan-instrument-with-calls value for the x86 architecture
> in the compiler is "1", which is not true for other architectures.
> Because of this, enabling inline mode in software tag-based KASAN
> doesn't work on x86 as the kernel script doesn't zero out the parameter
> and always sets up the outline mode.
> 
> Explicitly zero out hwasan-instrument-with-calls when enabling inline
> mode in tag-based KASAN.
> 
> Signed-off-by: Maciej Wieczor-Retman <maciej.wieczor-retman@intel.com>
> Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
> Reviewed-by: Alexander Potapenko <glider@google.com>
> ---

Reviewed-by: Andrey Ryabinin <ryabinin.a.a@gmail.com>