Re: [PATCH 0/5] kasan: add workqueue and timer stack for generic KASAN

2020-08-10 Thread Qian Cai
On Mon, Aug 10, 2020 at 10:31:22PM +0800, Walter Wu wrote: > On Mon, 2020-08-10 at 08:44 -0400, Qian Cai wrote: > > On Mon, Aug 10, 2020 at 07:50:57PM +0800, Walter Wu wrote: > > > On Mon, 2020-08-10 at 07:19 -0400, Qian Cai wrote: > > > > > > > > > On Aug 10, 2020, at 3:21 AM, Walter Wu > > > >

Re: [PATCH 0/5] kasan: add workqueue and timer stack for generic KASAN

2020-08-10 Thread Walter Wu
On Mon, 2020-08-10 at 08:44 -0400, Qian Cai wrote: > On Mon, Aug 10, 2020 at 07:50:57PM +0800, Walter Wu wrote: > > On Mon, 2020-08-10 at 07:19 -0400, Qian Cai wrote: > > > > > > > On Aug 10, 2020, at 3:21 AM, Walter Wu > > > > wrote: > > > > > > > > Syzbot reports many UAF issues for workqueu

Re: [PATCH 0/5] kasan: add workqueue and timer stack for generic KASAN

2020-08-10 Thread Qian Cai
On Mon, Aug 10, 2020 at 07:50:57PM +0800, Walter Wu wrote: > On Mon, 2020-08-10 at 07:19 -0400, Qian Cai wrote: > > > > > On Aug 10, 2020, at 3:21 AM, Walter Wu wrote: > > > > > > Syzbot reports many UAF issues for workqueue or timer, see [1] and [2]. > > > In some of these access/allocation ha

Re: [PATCH 0/5] kasan: add workqueue and timer stack for generic KASAN

2020-08-10 Thread Walter Wu
On Mon, 2020-08-10 at 19:50 +0800, Walter Wu wrote: > On Mon, 2020-08-10 at 07:19 -0400, Qian Cai wrote: > > > > > On Aug 10, 2020, at 3:21 AM, Walter Wu wrote: > > > > > > Syzbot reports many UAF issues for workqueue or timer, see [1] and [2]. > > > In some of these access/allocation happened

Re: [PATCH 0/5] kasan: add workqueue and timer stack for generic KASAN

2020-08-10 Thread Walter Wu
On Mon, 2020-08-10 at 07:19 -0400, Qian Cai wrote: > > > On Aug 10, 2020, at 3:21 AM, 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 K

Re: [PATCH 0/5] kasan: add workqueue and timer stack for generic KASAN

2020-08-10 Thread Qian Cai
> On Aug 10, 2020, at 3:21 AM, 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 wo

[PATCH 0/5] kasan: add workqueue and timer stack for generic KASAN

2020-08-10 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