Re: [PATCH v4 0/6] kasan: add workqueue and timer stack for generic KASAN

2020-12-01 Thread Walter Wu
On Tue, 2020-12-01 at 15:02 +0100, 'Dmitry Vyukov' via kasan-dev wrote: > On Tue, Dec 1, 2020 at 12:17 PM Walter Wu wrote: > > > > Hi Dmitry, > > > > On Tue, 2020-12-01 at 08:59 +0100, 'Dmitry Vyukov' via kasan-dev wrote: > > > On Wed, Sep 30, 2020 at 5:29 PM Thomas Gleixner > > > wrote: > > > >

Re: [PATCH v4 0/6] kasan: add workqueue and timer stack for generic KASAN

2020-12-01 Thread Dmitry Vyukov
On Tue, Dec 1, 2020 at 3:13 PM Thomas Gleixner wrote: > >> > Syzbot reports many UAF issues for workqueue or timer, see [1] and [2]. > >> > In some of these access/allocation happened in process_one_work(), > >> > we see the free stack is useless in KASAN report, it doesn't help > >> > programmers

Re: [PATCH v4 0/6] kasan: add workqueue and timer stack for generic KASAN

2020-12-01 Thread Thomas Gleixner
On Tue, Dec 01 2020 at 08:59, Dmitry Vyukov wrote: > On Wed, Sep 30, 2020 at 5:29 PM Thomas Gleixner wrote: >> On Thu, Sep 24 2020 at 12:01, Walter Wu wrote: >> > Syzbot reports many UAF issues for workqueue or timer, see [1] and [2]. >> > In some of these access/allocation happened in process_one

Re: [PATCH v4 0/6] kasan: add workqueue and timer stack for generic KASAN

2020-12-01 Thread Dmitry Vyukov
On Tue, Dec 1, 2020 at 12:17 PM Walter Wu wrote: > > Hi Dmitry, > > On Tue, 2020-12-01 at 08:59 +0100, 'Dmitry Vyukov' via kasan-dev wrote: > > On Wed, Sep 30, 2020 at 5:29 PM Thomas Gleixner wrote: > > > > > > On Thu, Sep 24 2020 at 12:01, Walter Wu wrote: > > > > Syzbot reports many UAF issues

Re: [PATCH v4 0/6] kasan: add workqueue and timer stack for generic KASAN

2020-12-01 Thread Walter Wu
Hi Dmitry, On Tue, 2020-12-01 at 08:59 +0100, 'Dmitry Vyukov' via kasan-dev wrote: > On Wed, Sep 30, 2020 at 5:29 PM Thomas Gleixner wrote: > > > > On Thu, Sep 24 2020 at 12:01, Walter Wu wrote: > > > Syzbot reports many UAF issues for workqueue or timer, see [1] and [2]. > > > In some of these a

Re: [PATCH v4 0/6] kasan: add workqueue and timer stack for generic KASAN

2020-12-01 Thread Dmitry Vyukov
On Wed, Sep 30, 2020 at 5:29 PM Thomas Gleixner wrote: > > On Thu, Sep 24 2020 at 12:01, Walter Wu wrote: > > Syzbot reports many UAF issues for workqueue or timer, see [1] and [2]. > > In some of these access/allocation happened in process_one_work(), > > we see the free stack is useless in KASAN

Re: [PATCH v4 0/6] kasan: add workqueue and timer stack for generic KASAN

2020-09-30 Thread Thomas Gleixner
On Thu, Sep 24 2020 at 12:01, Walter Wu wrote: > Syzbot reports many UAF issues for workqueue or timer, see [1] and [2]. > In some of these access/allocation happened in process_one_work(), > we see the free stack is useless in KASAN report, it doesn't help > programmers to solve UAF on workqueue.

Re: [PATCH v4 0/6] kasan: add workqueue and timer stack for generic KASAN

2020-09-24 Thread Walter Wu
On Thu, 2020-09-24 at 13:51 +0200, 'Alexander Potapenko' via kasan-dev wrote: > > --- > > Documentation/dev-tools/kasan.rst | 5 +++-- > > kernel/time/timer.c | 3 +++ > > kernel/workqueue.c| 3 +++ > > lib/test_kasan_module.c | 55 > > ++

Re: [PATCH v4 0/6] kasan: add workqueue and timer stack for generic KASAN

2020-09-24 Thread Alexander Potapenko
> --- > Documentation/dev-tools/kasan.rst | 5 +++-- > kernel/time/timer.c | 3 +++ > kernel/workqueue.c| 3 +++ > lib/test_kasan_module.c | 55 > +++ > mm/kasan/report.c | 4 ++-- > 5 files

[PATCH v4 0/6] kasan: add workqueue and timer stack for generic KASAN

2020-09-23 Thread Walter Wu
Syzbot reports many UAF issues for workqueue or timer, see [1] and [2]. In some of these access/allocation happened in process_one_work(), we see the free stack is useless in KASAN report, it doesn't help programmers to solve UAF on workqueue. The same may stand for times. This patchset improves K