On Fri, Feb 12, 2021 at 08:18:11PM +0900, Tetsuo Handa wrote: > On 2021/02/12 1:41, Michal Hocko wrote: > > But I suspect we have drifted away from the original issue. I thought > > that a simple check would help us narrow down this particular case and > > somebody messing up from the IRQ context didn't sound like a completely > > off. > > > > From my experience at > https://lkml.kernel.org/r/201409192053.ihj35462.jlomosoffvt...@i-love.sakura.ne.jp > , > I think we can replace direct PF_* manipulation with macros which do not > receive "struct task_struct *" argument. > Since TASK_PFA_TEST()/TASK_PFA_SET()/TASK_PFA_CLEAR() are for manipulating > PFA_* flags on a remote thread, we can > define similar ones for manipulating PF_* flags on current thread. Then, > auditing dangerous users becomes easier.
No, nobody is manipulating another task's GFP flags.
