Re: [PATCH][next] sched/debug: fix memory corruption caused by multiple small reads of flags

[Peter Zijlstra]

On Thu, Oct 29, 2020 at 03:11:03PM +0000, Colin King wrote:
> From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
> 
> Reading /proc/sys/kernel/sched_domain/cpu*/domain0/flags mutliple times
> with small reads causes oopses with slub corruption issues because the kfree is
> free'ing an offset from a previous allocation. Fix this by adding in a new
> pointer 'buf' for the allocation and kfree and use the temporary pointer tmp
> to handle memory copies of the buf offsets.

Thanks!