Re: [PATCH 3/3] x86/traps: fix an objtool warning in handle_bug()

[Kirill A . Shutemov]

On Fri, Jun 21, 2024 at 11:49:01AM +0200, Alexander Potapenko wrote:
> Because handle_bug() is a noinstr function, call to
> kmsan_unpoison_entry_regs() should be happening within the
> instrumentation_begin()/instrumentation_end() region.
> 
> Fortunately, the same noinstr annotation lets us dereference @regs
> in handle_bug() without unpoisoning them, so we don't have to move the
> `is_valid_bugaddr(regs->ip)` check below instrumentation_begin().

Imperative mood, please. And capitalize "fix" in the subject.

https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/tree/Documentation/process/maintainer-tip.rst#n134
> 
> Reported-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
> Link: https://groups.google.com/g/kasan-dev/c/ZBiGzZL36-I/m/WtNuKqP9EQAJ
> Signed-off-by: Alexander Potapenko <glider@xxxxxxxxxx>

Otherwise, looks good.

Reviewed-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>

-- 
  Kiryl Shutsemau / Kirill A. Shutemov