Re: [PATCH v3 1/2] prctl_set_mm: Refactor checks from validate_prctl_map

[Cyrill Gorcunov]

On Thu, May 02, 2019 at 02:52:02PM +0200, Michal Koutný wrote:
> Despite comment of validate_prctl_map claims there are no capability
> checks, it is not completely true since commit 4d28df6152aa ("prctl:
> Allow local CAP_SYS_ADMIN changing exe_file"). Extract the check out of
> the function and make the function perform purely arithmetic checks.
> 
> This patch should not change any behavior, it is mere refactoring for
> following patch.
> 
> v1, v2: ---
> v3: Remove unused mm variable from validate_prctl_map_addr
> 
> CC: Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>
> CC: Cyrill Gorcunov <gorcunov@xxxxxxxxx>
> Signed-off-by: Michal Koutný <mkoutny@xxxxxxxx>
> Reviewed-by: Kirill Tkhai <ktkhai@xxxxxxxxxxxxx>
Reviewed-by: Cyrill Gorcunov <gorcunov@xxxxxxxxx>