Re: [PATCH] ubsan: disable unsigned-integer-overflow sanitizer with clang

[Nathan Chancellor]

On Mon, Jan 04, 2021 at 03:33:33PM -0800, Andrew Morton wrote:
> On Mon, 4 Jan 2021 15:33:36 -0700 Nathan Chancellor <natechancellor@xxxxxxxxx> wrote:
> 
> > > > +++ b/lib/Kconfig.ubsan
> > > > @@ -122,6 +122,8 @@ config UBSAN_SIGNED_OVERFLOW
> > > >
> > > >  config UBSAN_UNSIGNED_OVERFLOW
> > > >         bool "Perform checking for unsigned arithmetic overflow"
> > > > +       # clang hugely expands stack usage with -fsanitize=object-size
> > > 
> > > This is the first time -fsanitize=object-size is mentioned. Typo?
> > 
> > Copy and paste issue from CONFIG_UBSAN_OBJECT_SIZE
> 
> This?

Correct.

> --- a/lib/Kconfig.ubsan~ubsan-disable-unsigned-integer-overflow-sanitizer-with-clang-fix
> +++ a/lib/Kconfig.ubsan
> @@ -122,7 +122,7 @@ config UBSAN_SIGNED_OVERFLOW
>  
>  config UBSAN_UNSIGNED_OVERFLOW
>  	bool "Perform checking for unsigned arithmetic overflow"
> -	# clang hugely expands stack usage with -fsanitize=object-size
> +	# clang hugely expands stack usage with -fsanitize=unsigned-integer-overflow
>  	depends on !CC_IS_CLANG
>  	depends on $(cc-option,-fsanitize=unsigned-integer-overflow)
>  	help
> _
> 

Cheers,
Nathan