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Wed, 17 Jul 2024 10:49:23 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id O9QVLrOhl2ZlPwAAD6G6ig (envelope-from ); Wed, 17 Jul 2024 10:49:23 +0000 Message-ID: <746087fd-993b-47b3-99e4-9bd4d3502e71@suse.cz> Date: Wed, 17 Jul 2024 12:49:23 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Vlastimil Babka Subject: [GIT PULL] slab updates for 6.11 To: Linus Torvalds Cc: David Rientjes , Christoph Lameter , Joonsoo Kim , Pekka Enberg , Andrew Morton , "linux-mm@kvack.org" , LKML , Roman Gushchin , Hyeonggon Yoo <42.hyeyoo@gmail.com>, Kees Cook , Chengming Zhou Content-Language: en-US Autocrypt: addr=vbabka@suse.cz; keydata= xsFNBFZdmxYBEADsw/SiUSjB0dM+vSh95UkgcHjzEVBlby/Fg+g42O7LAEkCYXi/vvq31JTB KxRWDHX0R2tgpFDXHnzZcQywawu8eSq0LxzxFNYMvtB7sV1pxYwej2qx9B75qW2plBs+7+YB 87tMFA+u+L4Z5xAzIimfLD5EKC56kJ1CsXlM8S/LHcmdD9Ctkn3trYDNnat0eoAcfPIP2OZ+ 9oe9IF/R28zmh0ifLXyJQQz5ofdj4bPf8ecEW0rhcqHfTD8k4yK0xxt3xW+6Exqp9n9bydiy tcSAw/TahjW6yrA+6JhSBv1v2tIm+itQc073zjSX8OFL51qQVzRFr7H2UQG33lw2QrvHRXqD Ot7ViKam7v0Ho9wEWiQOOZlHItOOXFphWb2yq3nzrKe45oWoSgkxKb97MVsQ+q2SYjJRBBH4 8qKhphADYxkIP6yut/eaj9ImvRUZZRi0DTc8xfnvHGTjKbJzC2xpFcY0DQbZzuwsIZ8OPJCc LM4S7mT25NE5kUTG/TKQCk922vRdGVMoLA7dIQrgXnRXtyT61sg8PG4wcfOnuWf8577aXP1x 6mzw3/jh3F+oSBHb/GcLC7mvWreJifUL2gEdssGfXhGWBo6zLS3qhgtwjay0Jl+kza1lo+Cv BB2T79D4WGdDuVa4eOrQ02TxqGN7G0Biz5ZLRSFzQSQwLn8fbwARAQABzSBWbGFzdGltaWwg QmFia2EgPHZiYWJrYUBzdXNlLmN6PsLBlAQTAQoAPgIbAwULCQgHAwUVCgkICwUWAgMBAAIe AQIXgBYhBKlA1DSZLC6OmRA9UCJPp+fMgqZkBQJkBREIBQkRadznAAoJECJPp+fMgqZkNxIQ ALZRqwdUGzqL2aeSavbum/VF/+td+nZfuH0xeWiO2w8mG0+nPd5j9ujYeHcUP1edE7uQrjOC Gs9sm8+W1xYnbClMJTsXiAV88D2btFUdU1mCXURAL9wWZ8Jsmz5ZH2V6AUszvNezsS/VIT87 AmTtj31TLDGwdxaZTSYLwAOOOtyqafOEq+gJB30RxTRE3h3G1zpO7OM9K6ysLdAlwAGYWgJJ V4JqGsQ/lyEtxxFpUCjb5Pztp7cQxhlkil0oBYHkudiG8j1U3DG8iC6rnB4yJaLphKx57NuQ PIY0Bccg+r9gIQ4XeSK2PQhdXdy3UWBr913ZQ9AI2usid3s5vabo4iBvpJNFLgUmxFnr73SJ KsRh/2OBsg1XXF/wRQGBO9vRuJUAbnaIVcmGOUogdBVS9Sun/Sy4GNA++KtFZK95U7J417/J Hub2xV6Ehc7UGW6fIvIQmzJ3zaTEfuriU1P8ayfddrAgZb25JnOW7L1zdYL8rXiezOyYZ8Fm ZyXjzWdO0RpxcUEp6GsJr11Bc4F3aae9OZtwtLL/jxc7y6pUugB00PodgnQ6CMcfR/HjXlae h2VS3zl9+tQWHu6s1R58t5BuMS2FNA58wU/IazImc/ZQA+slDBfhRDGYlExjg19UXWe/gMcl De3P1kxYPgZdGE2eZpRLIbt+rYnqQKy8UxlszsBNBFsZNTUBCACfQfpSsWJZyi+SHoRdVyX5 J6rI7okc4+b571a7RXD5UhS9dlVRVVAtrU9ANSLqPTQKGVxHrqD39XSw8hxK61pw8p90pg4G /N3iuWEvyt+t0SxDDkClnGsDyRhlUyEWYFEoBrrCizbmahOUwqkJbNMfzj5Y7n7OIJOxNRkB IBOjPdF26dMP69BwePQao1M8Acrrex9sAHYjQGyVmReRjVEtv9iG4DoTsnIR3amKVk6si4Ea X/mrapJqSCcBUVYUFH8M7bsm4CSxier5ofy8jTEa/CfvkqpKThTMCQPNZKY7hke5qEq1CBk2 wxhX48ZrJEFf1v3NuV3OimgsF2odzieNABEBAAHCwXwEGAEKACYCGwwWIQSpQNQ0mSwujpkQ PVAiT6fnzIKmZAUCZAUSmwUJDK5EZgAKCRAiT6fnzIKmZOJGEACOKABgo9wJXsbWhGWYO7mD 8R8mUyJHqbvaz+yTLnvRwfe/VwafFfDMx5GYVYzMY9TWpA8psFTKTUIIQmx2scYsRBUwm5VI EurRWKqENcDRjyo+ol59j0FViYysjQQeobXBDDE31t5SBg++veI6tXfpco/UiKEsDswL1WAr tEAZaruo7254TyH+gydURl2wJuzo/aZ7Y7PpqaODbYv727Dvm5eX64HCyyAH0s6sOCyGF5/p eIhrOn24oBf67KtdAN3H9JoFNUVTYJc1VJU3R1JtVdgwEdr+NEciEfYl0O19VpLE/PZxP4wX PWnhf5WjdoNI1Xec+RcJ5p/pSel0jnvBX8L2cmniYnmI883NhtGZsEWj++wyKiS4NranDFlA HdDM3b4lUth1pTtABKQ1YuTvehj7EfoWD3bv9kuGZGPrAeFNiHPdOT7DaXKeHpW9homgtBxj 8aX/UkSvEGJKUEbFL9cVa5tzyialGkSiZJNkWgeHe+jEcfRT6pJZOJidSCdzvJpbdJmm+eED w9XOLH1IIWh7RURU7G1iOfEfmImFeC3cbbS73LQEFGe1urxvIH5K/7vX+FkNcr9ujwWuPE9b 1C2o4i/yZPLXIVy387EjA6GZMqvQUFuSTs/GeBcv0NjIQi8867H3uLjz+mQy63fAitsDwLmR EP+ylKVEKb0Q2A== Content-Type: text/plain; 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Thanks, Vlastimil ====================================== The most prominent change this time is the kmem_buckets based hardening of kmalloc() allocations from Kees Cook. We have also extended the kmalloc() alignment guarantees for non-power-of-two sizes in a way that benefits rust. The rest are various cleanups and non-critical fixups. - Dedicated bucket allocator (Kees Cook) This series [1] enhances the probabilistic defense against heap spraying/grooming of CONFIG_RANDOM_KMALLOC_CACHES from last year. kmalloc() users that are known to be useful for exploits can get completely separate set of kmalloc caches that can't be shared with other users. The first converted users are alloc_msg() and memdup_user(). The hardening is enabled by CONFIG_SLAB_BUCKETS. - Extended kmalloc() alignment guarantees (Vlastimil Babka) For years now we have guaranteed natural alignment for power-of-two allocations, but nothing was defined for other sizes (in practice, we have two such buckets, kmalloc-96 and kmalloc-192). To avoid unnecessary padding in the rust layer due to its alignment rules, extend the guarantee so that the alignment is at least the largest power-of-two divisor of the requested size. This fits what rust needs, is a superset of the existing power-of-two guarantee, and does not in practice change the layout (and thus does not add overhead due to padding) of the kmalloc-96 and kmalloc-192 caches, unless slab debugging is enabled for them. - Cleanups and non-critical fixups (Chengming Zhou, Suren Baghdasaryan, Matthew Willcox, Alex Shi, Vlastimil Babka) Various tweaks related to the new alloc profiling code, folio conversion, debugging and more leftovers after SLAB. [1] https://lore.kernel.org/all/20240701190152.it.631-kees@kernel.org/ ---------------------------------------------------------------- Alex Shi (Tencent) (1): mm/memcg: alignment memcg_data define condition Chengming Zhou (3): slab: make check_object() more consistent slab: don't put freepointer outside of object if only orig_size slab: delete useless RED_INACTIVE and RED_ACTIVE Kees Cook (6): mm/slab: Introduce kmem_buckets typedef mm/slab: Plumb kmem_buckets into __do_kmalloc_node() mm/slab: Introduce kvmalloc_buckets_node() that can take kmem_buckets argument mm/slab: Introduce kmem_buckets_create() and family ipc, msg: Use dedicated slab buckets for alloc_msg() mm/util: Use dedicated slab buckets for memdup_user() Matthew Wilcox (Oracle) (1): mm: Reduce the number of slab->folio casts Suren Baghdasaryan (2): mm, slab: move allocation tagging code in the alloc path into a hook mm, slab: move prepare_slab_obj_exts_hook under CONFIG_MEM_ALLOC_PROFILING Vlastimil Babka (3): mm, slab: don't wrap internal functions with alloc_hooks() slab, rust: extend kmalloc() alignment guarantees to remove Rust padding Merge branch 'slab/for-6.11/buckets' into slab/for-next Documentation/core-api/memory-allocation.rst | 6 +- include/linux/mm.h | 6 +- include/linux/mm_types.h | 9 +- include/linux/poison.h | 7 +- include/linux/slab.h | 97 +++++++++---- ipc/msgutil.c | 13 +- kernel/configs/hardening.config | 1 + lib/fortify_kunit.c | 2 - lib/slub_kunit.c | 2 +- mm/Kconfig | 17 +++ mm/slab.h | 14 +- mm/slab_common.c | 111 +++++++++++++- mm/slub.c | 209 +++++++++++++++------------ mm/util.c | 23 ++- rust/kernel/alloc/allocator.rs | 19 +-- scripts/kernel-doc | 1 + tools/include/linux/poison.h | 7 +- 17 files changed, 369 insertions(+), 175 deletions(-)