lkml.org 
[lkml]   [2020]   [Feb]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [RFC PATCH v14 05/10] fs,landlock: Support filesystem access-control
On Thu, Feb 27, 2020 at 5:50 PM Mickaël Salaün <mic@digikod.net> wrote:
> On 26/02/2020 21:29, Jann Horn wrote:
> > On Mon, Feb 24, 2020 at 5:03 PM Mickaël Salaün <mic@digikod.net> wrote:
> >> +static inline u32 get_mem_access(unsigned long prot, bool private)
> >> +{
> >> + u32 access = LANDLOCK_ACCESS_FS_MAP;
> >> +
> >> + /* Private mapping do not write to files. */
> >> + if (!private && (prot & PROT_WRITE))
> >> + access |= LANDLOCK_ACCESS_FS_WRITE;
> >> + if (prot & PROT_READ)
> >> + access |= LANDLOCK_ACCESS_FS_READ;
> >> + if (prot & PROT_EXEC)
> >> + access |= LANDLOCK_ACCESS_FS_EXECUTE;
> >> + return access;
> >> +}
[...]
> However, I'm not sure this hook is useful for now. Indeed, the process
> still need to have a file descriptor open with the right accesses.

Yeah, agreed.

\
 
 \ /
  Last update: 2020-02-27 17:53    [W:0.081 / U:0.468 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site