Re: [PATCH] sched/core: check format and overflows in cgroup2 cpu.max

[Tejun Heo]

Hello,

On Wed, Feb 27, 2019 at 11:13:21AM +0300, Konstantin Khlebnikov wrote:
> Cgroup2 interface for cpu bandwidth limit has some flaws:
> 
> - on stack buffer overflow
> - no checks for valid format or trailing garbage
> - no checks for integer overflows
> 
> This patch fixes all these flaws.

Ditto as the blkio patch.  Unless there is a correctness problem, my
preference is towards keeping the parsing functions simple and I don't
think the kernel needs to play the role of strict input verifier here
as long as the only foot getting shot is the user's own.

Thanks.

-- 
tejun