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Randomize slab freelist

Webb25 apr. 2016 · Provides an optional config (CONFIG_FREELIST_RANDOM) to randomize the SLAB freelist. The list is randomized during initialization of a new set of pages. The order on different freelist sizes is pre-computed at boot for performance. Each kmem_cache … Webb> Fixes: c7ce4f60ac19 ("mm: SLAB freelist randomization") > Signed-off-by: John Sperbeck > Reviewed-by: Thomas Garnier This should have been signed off by yourself. I'm guessing that the author was in fact John?

kernel-hardening - [PATCH v2] mm: SLAB freelist randomization

Webb> Provides an optional config (CONFIG_FREELIST_RANDOM) to randomize the > SLAB freelist. The list is randomized during initialization of a new set > of pages. The order on different freelist sizes is pre-computed at boot > for performance. Each kmem_cache … Webb29 juni 2024 · Checks the hardening options in the Linux kernel config. optional arguments: -h, –help show this help message and exit. –version show program’s version number and exit. -p {X86_64,X86_32,ARM64,ARM}, –print {X86_64,X86_32,ARM64,ARM} print hardening preferences for selected architecture. pay enterprise claim online https://southwestribcentre.com

图解slub - Kernel Exploring - GitBook

WebbWe list mitigations added in all Linux versions. kernel.randomize_va_space. Address Space Layout Randomization (ASLR). virtual syscalls (vsyscall) replaced by virtual Dynamic Shared Object (vDSO) (ineffective until 2024) kernel.mmap_min_addr. NULL page … Webb30 nov. 2024 · The heap quarantine PUT operation you see in this output happens during kernel memory freeing. The heap quarantine REDUCE operation happens during kernel memory allocation, if the quarantine size limit is exceeded. The kernel objects released … Webb*PATCH] Fix SLAB freelist randomization duplicate entries @ 2024-01-03 18:19 Thomas Garnier 2024-01-06 0:35 ` Andrew Morton 0 siblings, 1 reply; 5+ messages in thread From: Thomas Garnier @ 2024-01-03 18:19 UTC (permalink / raw) To: Christoph Lameter, … screwfix co uk basin taps

CONFIG_SLAB_FREELIST_RANDOM: Randomize slab freelist

Category:Re: [PATCH v4] mm: SLAB freelist randomization

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Randomize slab freelist

linux/Kconfig at master · torvalds/linux · GitHub

Webb10 maj 2024 · To: Andrew Morton ; Subject: [PATCH v2 2/6] mm: Kconfig: move swap and slab config options to the MM section; From: Johannes Weiner ; Date: Tue, 10 May 2024 11:28:43 -0400; Cc: Michal Hocko , Roman Gushchin , Shakeel Butt … WebbOn Mon, 25 Apr 2016 13:39:23 -0700 Thomas Garnier wrote: > Provides an optional config (CONFIG_FREELIST_RANDOM) to randomize the > SLAB freelist. The list is randomized during initialization of a new set > of pages. The order on …

Randomize slab freelist

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WebbRandomizes the freelist order used on creating new pages. This security feature reduces the predictability of the kernel slab allocator against heap overflows. SLAB freelist randomization found in init/Kconfig. The configuration item … WebbThis commit reorganizes the previous SLAB freelist randomization to prepare for the SLUB implementation. It moves functions that will be shared to slab_common. It also move the definition of freelist_idx_t in the slab_def header so a similar type can be used for all …

WebbCONFIG_SLAB_FREELIST_RANDOM - Kernel-Config - BoxMatrix If you like BoxMatrix then please contribute Supportdata, Supportdata2, Firmware and/or Hardware ( get in touch ). My [email protected] is not reachable by me since september. Please use … Webbslab_test 1 run on boot. Difference only seen on the 2048 size test being the worse case scenario covered by freelist randomization. New slab pages are constantly being created on the 10000 allocations. Variance should be mainly due to getting new pages every few …

Webb25 apr. 2016 · The list is randomized during initialization of a new set of pages. The order on different freelist sizes is pre-computed at boot for performance. Each kmem_cache has its own randomized freelist except early on boot where global lists are used. WebbMake sense. I think it is still valuable to randomize earlier pages. I will adapt the code, test and send patch v4. Thanks for the quick feedback, Thomas On Mon, Apr 25, 2016 at 5:40 PM, Joonsoo Kim wrote: > On Mon, Apr 25, 2016 at 01:39:23PM -0700, Thomas Garnier wrote: >> Provides an optional config …

Webbslab_test 1 run on boot. Difference only seen on the 2048 size test being the worse case scenario covered by freelist randomization. New slab pages are constantly being created on the 10000 allocations. Variance should be mainly due to getting new pages every few …

WebbThis option is most effective with - CONFIG_SLUB. - -config SHUFFLE_PAGE_ALLOCATOR - bool "Page allocator randomization" - default SLAB_FREELIST_RANDOM && ACPI_NUMA - help - Randomization of the page allocator improves the average - utilization of a direct-mapped memory-side-cache. payentry employee appWebbThis is common in lots of heap-style attacks. They try to gain control over ordering by spraying allocations, etc. I'd really like to see this because it gives us something similar to CONFIG_SLAB_FREELIST_RANDOM but for the page allocator." Another motivation for this change is performance in the presence of a memory-side cache. screwfix co uk arbroathWebb5 apr. 2024 · In this way, the vulnerable object and memory allocated in other subsystems and modules will (most probably) be on different slab caches, which prevents the object from being sprayed. Signed-off-by: GONG, Ruiqi --- v0: The … screwfix co uk banbury