Re: Regarding slabinfo tool generating kernel crash

Re: Regarding slabinfo tool generating kernel crash

[Michal Hocko]

On Mon 26-02-18 18:52:35, Gopi Sai Teja wrote:
> Hi all,
> 
> We are using slabinfo tool with -df option. Tool is generating kernel crash.
> Please help if anyone got same issue.
> 
> Our kernel image was built with poison, store_user, red_zone and sanity_checks
> enabled in slab debug.

Such a report is basically pointless without the crash report and the
kernel version which happens to be affected.

-- 
Michal Hocko
SUSE Labs

Re: Re: Regarding slabinfo tool generating kernel crash

[Michal Hocko]

[Sorry for a late reply]

On Thu 01-03-18 12:48:10, Gopi Sai Teja wrote:
> Hi all,
>  
> Please find the crash logs attached tested on 4.4.0-116-generic #140-Ubuntu.
> How to reproduce:
> 
> Boot the kernel with all slab debug flags enabled(red_zone, poison,
> sanity_checks, store_user)
> 
> and run slabinfo -df.
> 
> For more info, please check the logs.
> If more info required, please let me know

Slabs are corrupted so you should focus on who causes the corruption.
Please work with your distribution support or try to reproduce with the
current upstream kernel to get more help on the kernel mailing list.
Slabtop merely points out the problem.
-- 
Michal Hocko
SUSE Labs