On Wed, Feb 07, 2024 at 01:45:28AM +, Justin Stitt wrote:
> I wouldn't mind also seeing a test_ubsan_div_overflow test case here.
>
> It has some quirky behavior and it'd be nice to test that the sanitizers
> properly capture it.
>
> Check out this Godbolt: https://godbolt.org/z/qG5f1j6n1
>
Hi,
On Mon, Feb 05, 2024 at 01:37:29AM -0800, Kees Cook wrote:
> In order to mitigate unexpected signed wrap-around[1], bring back the
> signed integer overflow sanitizer. It was removed in commit 6aaa31aeb9cf
> ("ubsan: remove overflow checks") because it was effectively a no-op
> when combined w
On Mon, Feb 05, 2024 at 02:10:26PM +0100, Marco Elver wrote:
> On Mon, 5 Feb 2024 at 13:59, Kees Cook wrote:
> >
> > On Mon, Feb 05, 2024 at 01:54:24PM +0100, Andrey Ryabinin wrote:
> > >
> > >
> > > On 2/5/24 10:37, Kees Cook wrote:
> > >
> > > > ---
> > > > include/linux/compiler_types.h | 9 +
On Mon, 5 Feb 2024 at 13:59, Kees Cook wrote:
>
> On Mon, Feb 05, 2024 at 01:54:24PM +0100, Andrey Ryabinin wrote:
> >
> >
> > On 2/5/24 10:37, Kees Cook wrote:
> >
> > > ---
> > > include/linux/compiler_types.h | 9 -
> > > lib/Kconfig.ubsan | 14 +++
> > > lib/test_ubsan.c
On Mon, Feb 05, 2024 at 01:54:24PM +0100, Andrey Ryabinin wrote:
>
>
> On 2/5/24 10:37, Kees Cook wrote:
>
> > ---
> > include/linux/compiler_types.h | 9 -
> > lib/Kconfig.ubsan | 14 +++
> > lib/test_ubsan.c | 37 ++
> > lib/ubsan.c
On 2/5/24 10:37, Kees Cook wrote:
> ---
> include/linux/compiler_types.h | 9 -
> lib/Kconfig.ubsan | 14 +++
> lib/test_ubsan.c | 37 ++
> lib/ubsan.c| 68 ++
> lib/ubsan.h
On Mon, Feb 05, 2024 at 12:29:21PM +0100, Marco Elver wrote:
> On Mon, 5 Feb 2024 at 10:37, Kees Cook wrote:
> >
> > In order to mitigate unexpected signed wrap-around[1], bring back the
> > signed integer overflow sanitizer. It was removed in commit 6aaa31aeb9cf
> > ("ubsan: remove overflow check
On Mon, 5 Feb 2024 at 10:37, Kees Cook wrote:
>
> In order to mitigate unexpected signed wrap-around[1], bring back the
> signed integer overflow sanitizer. It was removed in commit 6aaa31aeb9cf
> ("ubsan: remove overflow checks") because it was effectively a no-op
> when combined with -fno-strict
In order to mitigate unexpected signed wrap-around[1], bring back the
signed integer overflow sanitizer. It was removed in commit 6aaa31aeb9cf
("ubsan: remove overflow checks") because it was effectively a no-op
when combined with -fno-strict-overflow (which correctly changes signed
overflow from b
