[PATCH 0/2] fix the missing underflow in memory operation function

[Walter Wu]

The patchsets help to produce KASAN report when size is negative numbers
in memory operation function. It is helpful for programmer to solve the
undefined behavior issue. Patch 1 based on Dmitry's review and
suggestion, patch 2 is a test in order to verify the patch 1.

[1]https://bugzilla.kernel.org/show_bug.cgi?id=199341
[2]https://lore.kernel.org/linux-arm-kernel/20190927034338.15...@mediatek.com/

Walter Wu (2):
kasan: detect negative size in memory operation function
kasan: add test for invalid size in memmove

---
lib/test_kasan.c | 18 ++++++++++++++++++
mm/kasan/common.c | 13 ++++++++-----
mm/kasan/generic.c | 5 +++++
mm/kasan/generic_report.c | 18 ++++++++++++++++++
mm/kasan/tags.c | 5 +++++
mm/kasan/tags_report.c | 17 +++++++++++++++++
6 files changed, 71 insertions(+), 5 deletions(-)

--
2.18.0

[Dmitry Vyukov]

On Mon, Oct 14, 2019 at 12:32 PM Walter Wu <walter...@mediatek.com> wrote:
>
> The patchsets help to produce KASAN report when size is negative numbers
> in memory operation function. It is helpful for programmer to solve the
> undefined behavior issue. Patch 1 based on Dmitry's review and
> suggestion, patch 2 is a test in order to verify the patch 1.

Hi Walter,

I only received this cover letter, but not the actual patches. I also
don't see them in the group:
https://groups.google.com/forum/#!forum/kasan-dev
nor on internet. Have you mailed them? Where are they?

> [1]https://bugzilla.kernel.org/show_bug.cgi?id=199341
> [2]https://lore.kernel.org/linux-arm-kernel/20190927034338.15...@mediatek.com/
>
> Walter Wu (2):
> kasan: detect negative size in memory operation function
> kasan: add test for invalid size in memmove
>
> ---
> lib/test_kasan.c | 18 ++++++++++++++++++
> mm/kasan/common.c | 13 ++++++++-----
> mm/kasan/generic.c | 5 +++++
> mm/kasan/generic_report.c | 18 ++++++++++++++++++
> mm/kasan/tags.c | 5 +++++
> mm/kasan/tags_report.c | 17 +++++++++++++++++
> 6 files changed, 71 insertions(+), 5 deletions(-)
>
> --
> 2.18.0
>

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[Dmitry Vyukov]

On Mon, Oct 14, 2019 at 12:36 PM Dmitry Vyukov <dvy...@google.com> wrote:
>
> On Mon, Oct 14, 2019 at 12:32 PM Walter Wu <walter...@mediatek.com> wrote:
> >
> > The patchsets help to produce KASAN report when size is negative numbers
> > in memory operation function. It is helpful for programmer to solve the
> > undefined behavior issue. Patch 1 based on Dmitry's review and
> > suggestion, patch 2 is a test in order to verify the patch 1.
>
> Hi Walter,
>
> I only received this cover letter, but not the actual patches. I also
> don't see them in the group:
> https://groups.google.com/forum/#!forum/kasan-dev
> nor on internet. Have you mailed them? Where are they?

OK, received them just now.