Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
David Gow 6ed7f633da mm: only enforce minimum stack gap size if it's sensible ... commit 69b50d4351ed924f29e3d46b159e28f70dfc707f upstream. The generic mmap_base code tries to leave a gap between the top of the stack and the mmap base address, but enforces a minimum gap size (MIN_GAP) of 128MB, which is too large on some setups. In particular, on arm tasks without ADDR_LIMIT_32BIT, the STACK_TOP value is less than 128MB, so it's impossible to fit such a gap in. Only enforce this minimum if MIN_GAP < MAX_GAP, as we'd prefer to honour MAX_GAP, which is defined proportionally, so scales better and always leaves us with both _some_ stack space and some room for mmap. This fixes the usercopy KUnit test suite on 32-bit arm, as it doesn't set any personality flags so gets the default (in this case 26-bit) task size. This test can be run with: ./tools/testing/kunit/kunit.py run --arch arm usercopy --make_options LLVM=1 Link: https://lkml.kernel.org/r/20240803074642.1849623-2-davidgow@google.com Fixes: dba79c3df4 ("arm: use generic mmap top-down layout and brk randomization") Signed-off-by: David Gow <davidgow@google.com> Reviewed-by: Kees Cook <kees@kernel.org> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Luis Chamberlain <mcgrof@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Russell King <linux@armlinux.org.uk> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-11-08 16:20:35 +01:00
..
kasan	panic: Consolidate open-coded panic_on_warn checks	2023-02-06 07:52:50 +01:00
backing-dev.c	mm: bdi: initialize bdi_min_ratio when bdi is unregistered	2021-12-14 14:49:00 +01:00
balloon_compaction.c
cleancache.c
cma.c	mm/cma: use nth_page() in place of direct struct page manipulation	2023-11-28 16:50:19 +00:00
cma.h
cma_debug.c
compaction.c	mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations	2024-04-13 12:51:34 +02:00
debug.c
debug_page_ref.c
dmapool.c
early_ioremap.c
fadvise.c
failslab.c
filemap.c	mm: allow a controlled amount of unfairness in the page lock	2023-08-30 16:27:26 +02:00
frame_vector.c	v4l2: don't fall back to follow_pfn() if pin_user_pages_fast() fails	2022-12-08 11:23:06 +01:00
frontswap.c	treewide: Remove uninitialized_var() usage	2023-06-09 10:29:01 +02:00
gup.c	mm/hugetlb: fix races when looking up a CONT-PTE/PMD size hugetlb page	2022-12-19 12:24:15 +01:00
gup_benchmark.c
highmem.c
hmm.c
huge_memory.c	mm/thp: check and bail out if page in deferred queue already	2023-03-11 16:44:05 +01:00
hugetlb.c	mm/hugetlb: fix races when looking up a CONT-PTE/PMD size hugetlb page	2022-12-19 12:24:15 +01:00
hugetlb_cgroup.c
hwpoison-inject.c
init-mm.c
internal.h	mm/thp: fix vma_address() if virtual address below file offset	2021-06-30 08:47:52 -04:00
interval_tree.c
Kconfig
Kconfig.debug
khugepaged.c	mm/khugepaged: fix collapse_pte_mapped_thp() to allow anon_vma	2023-01-24 07:18:01 +01:00
kmemleak-test.c
kmemleak.c	Revert "mm: kmemleak: take a full lowmem check in kmemleak_*_phys()"	2022-09-15 12:04:49 +02:00
ksm.c	treewide: Remove uninitialized_var() usage	2023-06-09 10:29:01 +02:00
list_lru.c
maccess.c
madvise.c	mm: fix madivse_pageout mishandling on non-LRU page	2022-10-05 10:37:43 +02:00
Makefile
memblock.c	Revert "mm: Always release pages to the buddy allocator in memblock_free_late()."	2023-02-22 12:50:39 +01:00
memcontrol.c	memcg_write_event_control(): fix a user-triggerable oops	2024-09-04 13:14:50 +02:00
memfd.c	memfd: fix F_SEAL_WRITE after shmem huge page allocated	2022-03-08 19:07:49 +01:00
memory-failure.c	mm/memory-failure: fix an incorrect use of tail pages	2024-04-13 12:51:31 +02:00
memory.c	x86/mm/pat: fix VM_PAT handling in COW mappings	2024-04-13 12:51:40 +02:00
memory_hotplug.c	mm/memory_hotplug: use "unsigned long" for PFN in zone_for_pfn_range()	2021-09-22 12:26:43 +02:00
mempolicy.c	treewide: Remove uninitialized_var() usage	2023-06-09 10:29:01 +02:00
mempool.c
memremap.c
memtest.c	memtest: use {READ,WRITE}_ONCE in memory scanning	2024-04-13 12:51:27 +02:00
migrate.c	mm/migrate: set swap entry values of THP tail pages properly.	2024-04-13 12:51:31 +02:00
mincore.c
mlock.c
mm_init.c
mmap.c	mm: Fix TLB flush for not-first PFNMAP mappings in unmap_region()	2022-09-20 12:28:00 +02:00
mmu_context.c
mmu_gather.c	mm/khugepaged: fix GUP-fast interaction by sending IPI	2022-12-14 11:30:42 +01:00
mmu_notifier.c
mmzone.c	arm: remove CONFIG_ARCH_HAS_HOLES_MEMORYMODEL	2022-05-15 19:54:46 +02:00
mprotect.c
mremap.c	mm/mremap: hold the rmap lock in write mode when moving page table entries.	2022-08-25 11:17:20 +02:00
msync.c
nommu.c
oom_kill.c	oom_kill.c: futex: delay the OOM reaper to allow time for proper futex cleanup	2022-04-27 13:50:48 +02:00
page-writeback.c	mm: avoid overflows in dirty throttling logic	2024-08-19 05:33:42 +02:00
page_alloc.c	mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations	2024-04-13 12:51:34 +02:00
page_counter.c
page_ext.c
page_idle.c
page_io.c	mm: fix unexpected zeroed page mapping with zram swap	2022-05-12 12:23:48 +02:00
page_isolation.c
page_owner.c
page_poison.c
page_vma_mapped.c	mm/thp: another PVMW_SYNC fix in page_vma_mapped_walk()	2021-06-30 08:47:55 -04:00
pagewalk.c	mm: pagewalk: Fix race between unmap and page walker	2022-10-15 07:54:36 +02:00
percpu-internal.h
percpu-km.c
percpu-stats.c
percpu-vm.c
percpu.c	treewide: Remove uninitialized_var() usage	2023-06-09 10:29:01 +02:00
pgtable-generic.c	mm/thp: fix __split_huge_pmd_locked() on shmem migration entry	2021-06-30 08:47:52 -04:00
process_vm_access.c
readahead.c	vfs: fix readahead(2) on block devices	2023-11-20 10:30:08 +01:00
rmap.c	mm/rmap: Fix anon_vma->degree ambiguity leading to double-reuse	2022-09-05 10:27:46 +02:00
rodata_test.c
shmem.c	tmpfs: verify {g,u}id mount options correctly	2023-09-23 10:59:40 +02:00
shuffle.c
shuffle.h
slab.c
slab.h	mm: kmemleak: slob: respect SLAB_NOLEAKTRACE flag	2021-11-26 10:47:21 +01:00
slab_common.c	mm: slab: fix kmem_cache_create failed when sysfs node not destroyed	2021-07-25 14:35:14 +02:00
slob.c
slub.c	treewide: Remove uninitialized_var() usage	2023-06-09 10:29:01 +02:00
sparse-vmemmap.c
sparse.c
swap.c	treewide: Remove uninitialized_var() usage	2023-06-09 10:29:01 +02:00
swap_cgroup.c
swap_slots.c
swap_state.c
swapfile.c	mm/swap: fix swap_info_struct race between swapoff and get_swap_pages()	2023-04-20 12:07:35 +02:00
truncate.c	mm/thp: unmap_mapping_page() to fix THP truncate_cleanup_page()	2021-06-30 08:47:53 -04:00
usercopy.c	mm/usercopy: return 1 from hardened_usercopy __setup() handler	2022-04-15 14:18:30 +02:00
userfaultfd.c	userfaultfd: fix mmap_changing checking in mfill_atomic_hugetlb	2024-03-01 13:13:33 +01:00
util.c	mm: only enforce minimum stack gap size if it's sensible	2024-11-08 16:20:35 +01:00
vmacache.c
vmalloc.c
vmpressure.c
vmscan.c	mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations	2024-04-13 12:51:34 +02:00
vmstat.c	arm: remove CONFIG_ARCH_HAS_HOLES_MEMORYMODEL	2022-05-15 19:54:46 +02:00
workingset.c
z3fold.c	mm/z3fold: fix potential memory leak in z3fold_destroy_pool()	2021-07-14 16:53:47 +02:00
zbud.c
zpool.c
zsmalloc.c	zsmalloc: fix races between asynchronous zspage free and page migration	2022-06-06 08:33:50 +02:00
zswap.c