On Wed, Apr 16, 2025 at 02:06:21PM +0200, Petr Mladek wrote: > On Tue 2025-04-15 10:02:33, Kees Cook wrote: > > Some system owners use slab_debug=FPZ (or similar) as a hardening option, > > but do not want to be forced into having kernel addresses exposed due > > to the implicit "no_hash_pointers" boot param setting.[1] > > > > Introduce the "hash_pointers" boot param, which defaults to "auto" > > (the current behavior), but also includes "always" (forcing on hashing > > even when "slab_debug=..." is defined), and "never". The existing > > "no_hash_pointers" boot param becomes an alias for "hash_pointers=never". > > > > This makes it possible to boot with "slab_debug=FPZ hash_pointers=always". > > > > Link: https://github.com/KSPP/linux/issues/368 [1] > > Fixes: 792702911f58 ("slub: force on no_hash_pointers when slub_debug is enabled") > > Co-developed-by: Sergio Perez Gonzalez <sperezglz@xxxxxxxxx> > > Signed-off-by: Sergio Perez Gonzalez <sperezglz@xxxxxxxxx> > > Acked-by: Vlastimil Babka <vbabka@xxxxxxx> > > Acked-by: David Rientjes <rientjes@xxxxxxxxxx> > > Reviewed-by: Bagas Sanjaya <bagasdotme@xxxxxxxxx> > > Signed-off-by: Kees Cook <kees@xxxxxxxxxx> > > Tested-by: Petr Mladek <pmladek@xxxxxxxx> > Reviewed-by: Petr Mladek <pmladek@xxxxxxxx> > > I am going to wait few more days for a potential feedback. > I'll queue it for 6.16 unless anyone complains. Hi, Is this still planned for 6.16? I just noticed it wasn't in -next, and we're almost to the end of the merge window... -Kees -- Kees Cook
