Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-18 01:51:53 +00:00
Code Issues Packages Projects Releases Wiki Activity
84894e1c42
linux/mm
History
Peter Xu 84894e1c42 mm/hugetlb: fix cow where page writtable in child 
When rework early cow of pinned hugetlb pages, we moved huge_ptep_get()
upper but overlooked a side effect that the huge_ptep_get() will fetch the
pte after wr-protection.  After moving it upwards, we need explicit
wr-protect of child pte or we will keep the write bit set in the child
process, which could cause data corrution where the child can write to the
original page directly.

This issue can also be exposed by "memfd_test hugetlbfs" kselftest.

Link: https://lkml.kernel.org/r/20210503234356.9097-3-peterx@redhat.com
Fixes: 4eae4efa2c ("hugetlb: do early cow when page pinned on src mm")
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Joel Fernandes (Google) <joel@joelfernandes.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2021-05-14 19:41:32 -07:00
..
kasan mm: fix typos in comments 2021-05-07 00:26:35 -07:00
kfence mm: fix typos in comments 2021-05-07 00:26:35 -07:00
backing-dev.c mm/backing-dev.c: use might_alloc() 2021-02-26 09:41:01 -08:00
balloon_compaction.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
cleancache.c
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 mm: use proper type for cma_[alloc|release] 2021-05-05 11:27:24 -07:00
cma.h mm: cma: support sysfs 2021-05-05 11:27:24 -07:00
compaction.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
debug_page_ref.c
debug_vm_pgtable.c mm: HUGE_VMAP arch support cleanup 2021-04-30 11:20:40 -07:00
debug.c mm/debug: improve memcg debugging 2021-02-24 13:38:27 -08:00
dmapool.c mm/dmapool: switch from strlcpy to strscpy 2021-04-30 11:20:39 -07:00
early_ioremap.c mm/early_ioremap.c: use __func__ instead of function name 2021-02-26 09:41:02 -08:00
fadvise.c
failslab.c
filemap.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
frontswap.c mm/mempool: minor coding style tweaks 2021-05-05 11:27:27 -07:00
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 mm: fix typos in comments 2021-05-07 00:26:35 -07:00
highmem.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
hmm.c
huge_memory.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
hugetlb_cgroup.c hugetlb: make free_huge_page irq safe 2021-05-05 11:27:22 -07:00
hugetlb.c mm/hugetlb: fix cow where page writtable in child 2021-05-14 19:41:32 -07:00
hwpoison-inject.c
init-mm.c mm/gup: prevent gup_fast from racing with COW during fork 2020-12-15 12:13:39 -08:00
internal.h mm: fix typos in comments 2021-05-07 00:26:35 -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 vmap_range from mm/ioremap.c to mm/vmalloc.c 2021-04-30 11:20:40 -07:00
Kconfig mm,memory_hotplug: allocate memmap from the added memory range 2021-05-05 11:27:26 -07:00
Kconfig.debug mm, page_poison: remove CONFIG_PAGE_POISONING_ZERO 2020-12-15 12:13:46 -08:00
khugepaged.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
kmemleak.c mm/kmemleak.c: fix a typo 2021-04-30 11:20:36 -07:00
ksm.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
list_lru.c mm: vmscan: consolidate shrinker_maps handling code 2021-05-05 11:27:23 -07:00
maccess.c
madvise.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
Makefile mm,memory_hotplug: add kernel boot option to enable memmap_on_memory 2021-05-05 11:27:27 -07:00
mapping_dirty_helpers.c mm/mapping_dirty_helpers: guard hugepage pud's usage 2021-04-16 16:10:37 -07:00
memblock.c memblock: remove return value of memblock_free_all() 2021-02-22 13:01:23 -08:00
memcontrol.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
memfd.c
memory_hotplug.c mm/mempool: minor coding style tweaks 2021-05-05 11:27:27 -07:00
memory-failure.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
memory.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
mempolicy.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
mempool.c mm/mempool: minor coding style tweaks 2021-05-05 11:27:27 -07:00
memremap.c mm/memremap.c: fix improper SPDX comment style 2021-04-30 11:20:37 -07:00
memtest.c
migrate.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
mincore.c inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
mlock.c mm/mempool: minor coding style tweaks 2021-05-05 11:27:27 -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: add tracepoints around lock acquisition 2020-12-15 12:13:41 -08:00
mmap.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
mmu_gather.c mm: eliminate "expecting prototype" kernel-doc warnings 2021-04-16 16:10:36 -07:00
mmu_notifier.c mm/mmu_notifiers: ensure range_end() is paired with range_start() 2021-03-25 09:22:55 -07:00
mmzone.c mm/lru: replace pgdat lru_lock with lruvec lock 2020-12-15 14:48:04 -08:00
mprotect.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
mremap.c mm: fix typos in comments 2021-05-07 00:26:35 -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 mm/vmalloc: remove vwrite() 2021-05-07 00:26:34 -07:00
oom_kill.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
page_alloc.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
page_counter.c mm: page_counter: mitigate consequences of a page_counter underflow 2021-04-30 11:20:38 -07:00
page_ext.c mm: fix some spelling mistakes in comments 2020-12-15 22:46:19 -08:00
page_idle.c mm: page_idle_get_page() does not need lru_lock 2020-12-15 14:48:03 -08:00
page_io.c swap: fix swapfile read/write offset 2021-03-02 17:25:46 -07:00
page_isolation.c mm/page_isolation: do not isolate the max order page 2020-12-15 12:13:45 -08:00
page_owner.c mm: fix typos in comments 2021-05-07 00:26:35 -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: use list_entry_is_head() in page_reporting_cycle() 2021-02-24 13:38:30 -08:00
page_reporting.h
page_vma_mapped.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
page-writeback.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
pagewalk.c
percpu-internal.h mm: fix typos in comments 2021-05-07 00:26:35 -07:00
percpu-km.c
percpu-stats.c percpu: make pcpu_nr_empty_pop_pages per chunk type 2021-04-09 13:58:38 +00:00
percpu-vm.c mm/vmalloc: remove unmap_kernel_range 2021-04-30 11:20:40 -07:00
percpu.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
pgalloc-track.h mm: fix typos in comments 2021-05-07 00:26:35 -07:00
pgtable-generic.c mm/pgtable-generic.c: optimize the VM_BUG_ON condition in pmdp_huge_clear_flush() 2021-02-24 13:38:30 -08:00
process_vm_access.c mm/process_vm_access.c: remove duplicate include 2021-05-05 11:27:27 -07:00
ptdump.c mm: ptdump: fix build failure 2021-04-16 16:10:37 -07:00
readahead.c mm: Implement readahead_control pageset expansion 2021-04-23 10:14:29 +01:00
rmap.c mm: fix some typos and code style problems 2021-05-07 00:26:33 -07:00
rodata_test.c
shmem.c mm/hugetlb: fix F_SEAL_FUTURE_WRITE 2021-05-14 19:41:32 -07:00
shuffle.c mm: eliminate "expecting prototype" kernel-doc warnings 2021-04-16 16:10:36 -07:00
shuffle.h
slab_common.c mm/slab_common: provide "slab_merge" option for !IS_ENABLED(CONFIG_SLAB_MERGE_DEFAULT) builds 2021-04-30 11:20:36 -07:00
slab.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
slab.h kasan, mm: integrate slab init_on_alloc with HW_TAGS 2021-04-30 11:20:41 -07:00
slob.c mm: Don't build mm_dump_obj() on CONFIG_PRINTK=n kernels 2021-03-08 14:18:46 -08:00
slub.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
sparse-vmemmap.c
sparse.c mm/mempool: minor coding style tweaks 2021-05-05 11:27:27 -07:00
swap_cgroup.c
swap_slots.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
swap_state.c mm: fix some typos and code style problems 2021-05-07 00:26:33 -07:00
swap.c mm: fix some typos and code style problems 2021-05-07 00:26:33 -07:00
swapfile.c mm/mempool: minor coding style tweaks 2021-05-05 11:27:27 -07:00
truncate.c mm: stop accounting shadow entries 2021-05-05 11:27:19 -07:00
usercopy.c
userfaultfd.c userfaultfd: add UFFDIO_CONTINUE ioctl 2021-05-05 11:27:22 -07:00
util.c mm/util.c: fix typo 2021-05-05 11:27:25 -07:00
vmacache.c
vmalloc.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
vmpressure.c
vmscan.c mm/mempool: minor coding style tweaks 2021-05-05 11:27:27 -07:00
vmstat.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
workingset.c mm: stop accounting shadow entries 2021-05-05 11:27:19 -07:00
z3fold.c mm: fix some typos and code style problems 2021-05-07 00:26:33 -07:00
zbud.c mm: set the sleep_mapped to true for zbud and z3fold 2021-02-26 09:41:01 -08:00
zpool.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
zsmalloc.c mm: fix typos in comments 2021-05-07 00:26:35 -07:00
zswap.c mm/zswap.c: switch from strlcpy to strscpy 2021-05-05 11:27:27 -07:00