On Fri, Aug 16, 2019 at 03:48:49PM +0800, Ming Lei wrote:
> It is reported that sysfs buffer overflow can be triggered in case
> of too many CPU cores(>841 on 4K PAGE_SIZE) when showing CPUs in
> blk_mq_hw_sysfs_cpus_show().
>
> This info isn't useful, given users may retrieve the CPU list
> from sw queue entries under same kobject dir, so far not see
> any active users.
>
> So remove the entry as suggested by Greg.
>
> Cc: stable@xxxxxxxxxxxxxxx
> Cc: Mark Ray <mark.ray@xxxxxxx>
> Cc: Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>
> Fixes: 676141e48af7("blk-mq: don't dump CPU -> hw queue map on driver load")
> Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
> ---
> block/blk-mq-sysfs.c | 23 -----------------------
> 1 file changed, 23 deletions(-)
Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
