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Matthew Wilcox (Oracle) 1dfbe9fcda usercopy: Make usercopy resilient against ridiculously large copies 
If 'n' is so large that it's negative, we might wrap around and mistakenly
think that the copy is OK when it's not.  Such a copy would probably
crash, but just doing the arithmetic in a more simple way lets us detect
and refuse this case.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Tested-by: Zorro Lang <zlang@redhat.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220612213227.3881769-4-willy@infradead.org
2022-06-13 09:54:52 -07:00
..
damon
mm: damon: use HPAGE_PMD_SIZE
2022-05-19 14:08:55 -07:00
kasan
mm: kasan: fix input of vmalloc_to_page()
2022-05-27 09:33:46 -07:00
kfence
Yang Shi has improved the behaviour of khugepaged collapsing of readonly
2022-05-26 12:32:41 -07:00
backing-dev.c
blk-cgroup: remove unneeded includes from <linux/blk-cgroup.h>
2022-05-02 14:06:20 -06:00
balloon_compaction.c
mm/balloon_compaction: make balloon page compaction callbacks static
2022-03-28 16:52:57 -04:00
bootmem_info.c
bootmem: Use page->index instead of page->freelist
2022-01-06 12:27:03 +01:00
cma_debug.c
mm/cma: change cma mutex to irq safe spinlock
2021-05-05 11:27:21 -07:00
cma_sysfs.c
mm: cma: support sysfs
2021-05-05 11:27:24 -07:00
cma.c
Revert "mm/cma.c: remove redundant cma_mutex lock"
2022-05-13 15:11:26 -07:00
cma.h
mm/cma: provide option to opt out from exposing pages on activation failure
2022-03-22 15:57:09 -07:00
compaction.c
mm, compaction: fast_find_migrateblock() should return pfn in the target zone
2022-05-13 16:48:57 -07:00
debug_page_ref.c
…
debug_vm_pgtable.c
mm/debug_vm_pgtable: add tests for __HAVE_ARCH_PTE_SWP_EXCLUSIVE
2022-05-09 18:20:45 -07:00
debug.c
mm: unexport page_init_poison
2022-03-24 19:06:45 -07:00
dmapool.c
mm/dmapool.c: revert "make dma pool to use kmalloc_node"
2022-01-15 16:30:28 +02:00
early_ioremap.c
mm/early_ioremap: declare early_memremap_pgprot_adjust()
2022-03-22 15:57:11 -07:00
fadvise.c
riscv: compat: syscall: Add compat_sys_call_table implementation
2022-04-26 13:36:25 -07:00
failslab.c
mm: fix missing handler for __GFP_NOWARN
2022-05-19 14:08:55 -07:00
filemap.c
filemap: Cache the value of vm_flags
2022-06-09 16:24:25 -04:00
folio-compat.c
fs: Remove aop flags parameter from grab_cache_page_write_begin()
2022-05-08 14:28:19 -04:00
frontswap.c
frontswap: remove support for multiple ops
2022-01-22 08:33:38 +02:00
gup_test.c
selftests/vm: gup_test: test faulting in kernel, and verify pinnable pages
2021-05-05 11:27:26 -07:00
gup_test.h
selftests/vm: gup_test: fix test flag
2021-05-05 11:27:26 -07:00
gup.c
Yang Shi has improved the behaviour of khugepaged collapsing of readonly
2022-05-26 12:32:41 -07:00
highmem.c
highmem: fix checks in __kmap_local_sched_{in,out}
2022-04-08 14:20:36 -10:00
hmm.c
mm: teach core mm about pte markers
2022-05-13 07:20:09 -07:00
huge_memory.c
mm/huge_memory: Fix xarray node memory leak
2022-06-09 16:24:25 -04:00
hugetlb_cgroup.c
hugetlb: add hugetlb.*.numa_stat file
2022-01-15 16:30:29 +02:00
hugetlb_vmemmap.c
mm: hugetlb_vmemmap: fix CONFIG_HUGETLB_PAGE_FREE_VMEMMAP_DEFAULT_ON
2022-06-01 15:57:16 -07:00
hugetlb_vmemmap.h
mm: hugetlb_vmemmap: cleanup CONFIG_HUGETLB_PAGE_FREE_VMEMMAP*
2022-04-28 23:16:15 -07:00
hugetlb.c
delayacct: track delays from write-protect copy
2022-06-01 15:55:25 -07:00
hwpoison-inject.c
mm/hwpoison: disable hwpoison filter during removing
2022-05-13 07:20:19 -07:00
init-mm.c
kernel/fork: Initialize mm's PASID
2022-02-14 19:51:47 +01:00
internal.h
mm: split free page with properly free memory accounting and without race
2022-05-27 09:33:43 -07:00
interval_tree.c
mm/interval_tree: add comments to improve code readability
2021-04-30 11:20:38 -07:00
io-mapping.c
mm: add a io_mapping_map_user helper
2021-04-30 11:20:39 -07:00
ioremap.c
mm: move ioremap_page_range to vmalloc.c
2021-09-08 11:50:24 -07:00
Kconfig
mm: Kconfig: reorganize misplaced mm options
2022-05-27 09:33:47 -07:00
Kconfig.debug
Two followon fixes for the post-5.19 series "Use pageblock_order for cma
2022-05-27 11:40:49 -07:00
khugepaged.c
mm: khugepaged: introduce khugepaged_enter_vma() helper
2022-05-19 14:08:50 -07:00
kmemleak.c
mm: kmemleak: take a full lowmem check in kmemleak_*_phys()
2022-04-15 14:49:56 -07:00
ksm.c
ksm: fix typo in comment
2022-05-25 10:47:48 -07:00
list_lru.c
mm/list_lru.c: revert "mm/list_lru: optimize memcg_reparent_list_lru_node()"
2022-04-08 14:20:36 -10:00
maccess.c
asm-generic updates for 5.18
2022-03-23 18:03:08 -07:00
madvise.c
mm: filter out swapin error entry in shmem mapping
2022-05-27 09:33:46 -07:00
Makefile
mm: hugetlb_vmemmap: cleanup CONFIG_HUGETLB_PAGE_FREE_VMEMMAP*
2022-04-28 23:16:15 -07:00
mapping_dirty_helpers.c
mm: move tlb_flush_pending inline helpers to mm_inline.h
2022-01-15 16:30:27 +02:00
memblock.c
memblock: test suite and a small cleanup
2022-03-27 13:36:06 -07:00
memcontrol.c
zswap: memcg accounting
2022-05-19 14:08:53 -07:00
memfd.c
memfd: fix F_SEAL_WRITE after shmem huge page allocated
2022-03-05 11:08:32 -08:00
memory_hotplug.c
mm: hugetlb_vmemmap: add hugetlb_optimize_vmemmap sysctl
2022-05-13 16:48:56 -07:00
memory-failure.c
Yang Shi has improved the behaviour of khugepaged collapsing of readonly
2022-05-26 12:32:41 -07:00
memory.c
delayacct: track delays from write-protect copy
2022-06-01 15:55:25 -07:00
mempolicy.c
mm/mempolicy: fix uninit-value in mpol_rebind_policy()
2022-05-19 14:08:54 -07:00
mempool.c
mm: remove spurious blkdev.h includes
2021-10-18 06:17:01 -06:00
memremap.c
mm/memremap: fix missing call to untrack_pfn() in pagemap_range()
2022-06-01 15:57:16 -07:00
memtest.c
…
migrate_device.c
mm: remember exclusively mapped anonymous pages with PG_anon_exclusive
2022-05-09 18:20:44 -07:00
migrate.c
Yang Shi has improved the behaviour of khugepaged collapsing of readonly
2022-05-26 12:32:41 -07:00
mincore.c
mm: teach core mm about pte markers
2022-05-13 07:20:09 -07:00
mlock.c
mm/munlock: protect the per-CPU pagevec by a local_lock_t
2022-04-01 11:46:09 -07:00
mm_init.c
include/linux/page-flags-layout.h: cleanups
2021-04-30 11:20:42 -07:00
mmap_lock.c
mm: mmap_lock: fix disabling preemption directly
2021-07-23 17:43:28 -07:00
mmap.c
powerpc updates for 5.19
2022-05-28 11:27:17 -07:00
mmu_gather.c
mm/mmu_gather: limit free batch count and add schedule point in tlb_batch_pages_flush
2022-04-28 23:16:12 -07:00
mmu_notifier.c
mm/mmu_notifier.c: fix race in mmu_interval_notifier_remove()
2022-04-21 20:01:10 -07:00
mmzone.c
Folio changes for 5.18
2022-03-22 17:03:12 -07:00
mprotect.c
mm/hugetlb: handle UFFDIO_WRITEPROTECT
2022-05-13 07:20:11 -07:00
mremap.c
Yang Shi has improved the behaviour of khugepaged collapsing of readonly
2022-05-26 12:32:41 -07:00
msync.c
mm/msync: exit early when the flags is an MS_ASYNC and start < vm_start
2021-04-30 11:20:37 -07:00
nommu.c
no-MMU: expose vmalloc_huge() for alloc_large_system_hash()
2022-04-25 10:11:49 -07:00
oom_kill.c
mm/oom_kill.c: fix vm_oom_kill_table[] ifdeffery
2022-06-01 15:57:16 -07:00
page_alloc.c
Two followon fixes for the post-5.19 series "Use pageblock_order for cma
2022-05-27 11:40:49 -07:00
page_counter.c
mm/page_counter: remove an incorrect call to propagate_protected_usage()
2022-01-15 16:30:27 +02:00
page_ext.c
mm: use for_each_online_node and node_online instead of open coding
2022-04-29 14:36:58 -07:00
page_idle.c
mm: don't be stuck to rmap lock on reclaim path
2022-05-19 14:08:54 -07:00
page_io.c
Yang Shi has improved the behaviour of khugepaged collapsing of readonly
2022-05-26 12:32:41 -07:00
page_isolation.c
mm: page_isolation: use compound_nr() correctly in isolate_single_pageblock()
2022-06-01 15:57:16 -07:00
page_owner.c
Yang Shi has improved the behaviour of khugepaged collapsing of readonly
2022-05-26 12:32:41 -07:00
page_poison.c
mm: page_poison: print page info when corruption is caught
2021-04-30 11:20:36 -07:00
page_reporting.c
mm/page_reporting: allow driver to specify reporting order
2021-06-29 10:53:47 -07:00
page_reporting.h
mm/page_reporting: export reporting order as module parameter
2021-06-29 10:53:47 -07:00
page_table_check.c
Six hotfixes. One from Miaohe Lin is considered a minor thing so it isn't
2022-05-27 11:29:35 -07:00
page_vma_mapped.c
mm: pvmw: add support for walking devmap pages
2022-04-28 23:16:10 -07:00
page-writeback.c
sysctl changes for v5.19-rc1
2022-05-26 16:57:20 -07:00
pagewalk.c
mm: pagewalk: fix walk for hugepage tables
2021-06-29 10:53:49 -07:00
percpu-internal.h
percpu: improve percpu_alloc_percpu event trace
2022-05-13 07:20:18 -07:00
percpu-km.c
percpu: flush tlb in pcpu_reclaim_populated()
2021-07-04 18:30:17 +00:00
percpu-stats.c
mm: use vmalloc_array and vcalloc for array allocations
2022-03-08 09:30:46 -05:00
percpu-vm.c
percpu: flush tlb in pcpu_reclaim_populated()
2021-07-04 18:30:17 +00:00
percpu.c
percpu: improve percpu_alloc_percpu event trace
2022-05-13 07:20:18 -07:00
pgalloc-track.h
mm: fix typos in comments
2021-05-07 00:26:35 -07:00
pgtable-generic.c
mm: avoid unnecessary flush on change_huge_pmd()
2022-05-13 07:20:05 -07:00
process_vm_access.c
mm/process_vm_access.c: remove duplicate include
2021-05-05 11:27:27 -07:00
ptdump.c
mm: sparsemem: use page table lock to protect kernel pmd operations
2022-03-22 15:57:08 -07:00
readahead.c
filemap: Don't release a locked folio
2022-06-09 16:24:25 -04:00
rmap.c
mm: don't be stuck to rmap lock on reclaim path
2022-05-19 14:08:54 -07:00
rodata_test.c
…
secretmem.c
secretmem: Convert to free_folio
2022-05-09 23:12:53 -04:00
shmem.c
Two followon fixes for the post-5.19 series "Use pageblock_order for cma
2022-05-27 11:40:49 -07:00
shuffle.c
mm: eliminate "expecting prototype" kernel-doc warnings
2021-04-16 16:10:36 -07:00
shuffle.h
mm/shuffle: fix section mismatch warning
2021-05-22 15:09:07 -10:00
slab_common.c
Yang Shi has improved the behaviour of khugepaged collapsing of readonly
2022-05-26 12:32:41 -07:00
slab.c
Yang Shi has improved the behaviour of khugepaged collapsing of readonly
2022-05-26 12:32:41 -07:00
slab.h
slab changes for 5.19
2022-05-25 10:24:04 -07:00
slob.c
mm: make minimum slab alignment a runtime property
2022-05-13 07:20:07 -07:00
slub.c
slab changes for 5.19
2022-05-25 10:24:04 -07:00
sparse-vmemmap.c
mm/sparse-vmemmap: improve memory savings for compound devmaps
2022-04-28 23:16:16 -07:00
sparse.c
mm/memory-failure.c: move clear_hwpoisoned_pages
2022-05-13 07:20:19 -07:00
swap_cgroup.c
mm: use vmalloc_array and vcalloc for array allocations
2022-03-08 09:30:46 -05:00
swap_slots.c
mm/swap: remove buggy cache->nr check in refill_swap_slots_cache
2022-05-19 14:08:51 -07:00
swap_state.c
mm: filter out swapin error entry in shmem mapping
2022-05-27 09:33:46 -07:00
swap.c
mm/swap: fix the comment of get_kernel_pages
2022-05-19 14:08:52 -07:00
swap.h
swap: convert add_to_swap() to take a folio
2022-05-13 07:20:15 -07:00
swapfile.c
Two followon fixes for the post-5.19 series "Use pageblock_order for cma
2022-05-27 11:40:49 -07:00
truncate.c
Filesystem folio changes for 5.18
2022-03-22 18:26:56 -07:00
usercopy.c
usercopy: Make usercopy resilient against ridiculously large copies
2022-06-13 09:54:52 -07:00
userfaultfd.c
mm/uffd: enable write protection for shmem & hugetlbfs
2022-05-13 07:20:11 -07:00
util.c
powerpc updates for 5.19
2022-05-28 11:27:17 -07:00
vmacache.c
…
vmalloc.c
usercopy: Handle vm_map_ram() areas
2022-06-13 09:54:52 -07:00
vmpressure.c
mm/vmpressure: fix data-race with memcg->socket_pressure
2021-11-06 13:30:40 -07:00
vmscan.c
Yang Shi has improved the behaviour of khugepaged collapsing of readonly
2022-05-26 12:32:41 -07:00
vmstat.c
Bitmap patches for 5.19-rc1
2022-06-04 14:04:27 -07:00
workingset.c
memcg: sync flush only if periodic flush is delayed
2022-04-21 20:01:09 -07:00
z3fold.c
mm/z3fold: fix z3fold_page_migrate races with z3fold_map
2022-05-27 09:33:44 -07:00
zbud.c
mm/zbud: add kerneldoc fields for zbud_pool
2021-07-01 11:06:03 -07:00
zpool.c
zpool: remove the list of pools_head
2022-01-15 16:30:31 +02:00
zsmalloc.c
zsmalloc: fix races between asynchronous zspage free and page migration
2022-05-13 15:11:26 -07:00
zswap.c
zswap: memcg accounting
2022-05-19 14:08:53 -07:00