Messages in this thread | | | Date | Tue, 29 Aug 2023 15:22:37 +0200 | From | Vlastimil Babka <> | Subject | [GIT PULL] slab updates for 6.6 |
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Hi Linus,
please pull the latest slab updates from:
git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab.git tags/slab-for-6.6
This happens to be a small one (due to summer I guess), and all hardening related.
Thanks, Vlastimil
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* Randomized kmalloc caches, by GONG, Ruiqi.
A new opt-in hardening feature to make heap spraying harder. It creates multiple (16) copies of kmalloc caches, reducing the chance of an attacker-controllable allocation site to land in the same slab as e.g. an allocation site with use-after-free vulnerability. The selection of the copy is derived from the allocation site address, including a per-boot random seed.
* Stronger typing for hardened freelists in SLUB, by Jann Horn
Introduces a custom type for hardened freelist entries instead of "void *" as those are not directly dereferencable. While reviewing this, I've noticed opportunities for further cleanups in that code and added those on top.
---------------------------------------------------------------- GONG, Ruiqi (1): Randomized slab caches for kmalloc()
Jann Horn (1): mm/slub: refactor freelist to use custom type
Vlastimil Babka (3): mm/slub: remove redundant kasan_reset_tag() from freelist_ptr calculations mm/slub: remove freelist_dereference() Merge branch 'slab/for-6.6/random_kmalloc' into slab/for-next
include/linux/percpu.h | 12 +++++++--- include/linux/slab.h | 23 +++++++++++++++++--- mm/Kconfig | 17 +++++++++++++++ mm/kfence/kfence_test.c | 7 ++++-- mm/slab.c | 2 +- mm/slab.h | 2 +- mm/slab_common.c | 49 ++++++++++++++++++++++++++++++++++++----- mm/slub.c | 58 ++++++++++++++++++++++++++++--------------------- 8 files changed, 130 insertions(+), 40 deletions(-) ~
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