TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
Files
v4.9.317
twx-linux/mm
T
History
Muchun Song e53914e797 mm: userfaultfd: fix missing cache flush in mcopy_atomic_pte() and __mcopy_atomic() 
commit 7c25a0b89a upstream.

userfaultfd calls mcopy_atomic_pte() and __mcopy_atomic() which do not
do any cache flushing for the target page.  Then the target page will be
mapped to the user space with a different address (user address), which
might have an alias issue with the kernel address used to copy the data
from the user to.  Fix this by insert flush_dcache_page() after
copy_from_user() succeeds.

Link: https://lkml.kernel.org/r/20220210123058.79206-7-songmuchun@bytedance.com
Fixes: b6ebaedb4c ("userfaultfd: avoid mmap_sem read recursion in mcopy_atomic")
Fixes: c1a4de99fa ("userfaultfd: mcopy_atomic|mfill_zeropage: UFFDIO_COPY|UFFDIO_ZEROPAGE preparation")
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Fam Zheng <fam.zheng@bytedance.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Lars Persson <lars.persson@axis.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Xiongchun Duan <duanxiongchun@bytedance.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-05-15 19:39:17 +02:00
..
kasan
kasan: avoid -Wmaybe-uninitialized warning
2019-05-08 07:19:07 +02:00
backing-dev.c
mm: bdi: initialize bdi_min_ratio when bdi is unregistered
2021-12-14 10:04:47 +01:00
balloon_compaction.c
…
bootmem.c
…
cleancache.c
…
cma_debug.c
mm/cma_debug.c: fix the break condition in cma_maxchunk_get()
2019-06-22 08:17:12 +02:00
cma.c
mm/cma.c: fail if fixed declaration can't be honored
2019-08-06 18:29:37 +02:00
cma.h
…
compaction.c
…
debug_page_ref.c
…
debug.c
mm: get rid of vmacache_flush_all() entirely
2018-09-19 22:47:17 +02:00
dmapool.c
…
early_ioremap.c
…
fadvise.c
mm/fadvise.c: fix signed overflow UBSAN complaint
2018-09-15 09:42:57 +02:00
failslab.c
…
filemap.c
mm/filemap.c: clear page error before actual read
2020-10-01 20:40:11 +02:00
frame_vector.c
mm/frame_vector.c: release a semaphore in 'get_vaddr_frames()'
2018-11-10 07:42:52 -08:00
frontswap.c
…
gup.c
gup: document and work around "COW can break either way" issue
2022-01-27 08:47:42 +01:00
highmem.c
…
huge_memory.c
gup: document and work around "COW can break either way" issue
2022-01-27 08:47:42 +01:00
hugetlb_cgroup.c
mm: hugetlb: switch to css_tryget() in hugetlb_cgroup_charge_cgroup()
2019-11-25 09:51:58 +01:00
hugetlb.c
hugetlb: take PMD sharing into account when flushing tlb/caches
2021-12-08 08:45:05 +01:00
hwpoison-inject.c
…
init-mm.c
…
internal.h
vmscan: return NODE_RECLAIM_NOSCAN in node_reclaim() when CONFIG_NUMA is n
2019-12-05 15:35:02 +01:00
interval_tree.c
…
Kconfig
…
Kconfig.debug
…
khugepaged.c
khugepaged: fix wrong result value for trace_mm_collapse_huge_page_isolate()
2021-05-22 10:40:31 +02:00
kmemcheck.c
…
kmemleak-test.c
…
kmemleak.c
mm: kmemleak: take a full lowmem check in kmemleak_*_phys()
2022-04-20 09:06:46 +02:00
ksm.c
ksm: fix potential missing rmap_item for stable_node
2021-05-22 10:40:31 +02:00
list_lru.c
mm/list_lru.c: fix memory leak in __memcg_init_list_lru_node
2019-06-22 08:17:18 +02:00
maccess.c
uaccess: Add non-pagefault user-space write function
2020-09-12 11:47:35 +02:00
madvise.c
mm: madvise(MADV_DODUMP): allow hugetlbfs pages
2018-10-10 08:53:20 +02:00
Makefile
…
memblock.c
memblock: use kfree() to release kmalloced memblock regions
2022-03-02 11:32:06 +01:00
memcontrol.c
mm/memcontrol: return 1 from cgroup.memory __setup() handler
2022-04-20 09:06:41 +02:00
memory_hotplug.c
mm: Avoid calling build_all_zonelists_init under hotplug context
2020-08-21 11:02:11 +02:00
memory-failure.c
mm: hwpoison: change PageHWPoison behavior on hugetlb pages
2021-06-30 08:49:13 -04:00
memory.c
mm: don't skip swap entry even if zap_details specified
2022-04-20 09:06:44 +02:00
mempolicy.c
mm/mempolicy: fix mpol_new leak in shared_policy_replace
2022-04-20 09:06:44 +02:00
mempool.c
…
memtest.c
…
migrate.c
hugetlbfs: fix races and page leaks during migration
2019-03-13 14:04:54 -07:00
mincore.c
mm/mincore.c: make mincore() more conservative
2019-05-21 18:48:58 +02:00
mlock.c
mm/mlock.c: change count_mm_mlocked_page_nr return type
2019-07-10 09:55:43 +02:00
mm_init.c
…
mmap.c
mm/mmap: return 1 from stack_guard_gap __setup() handler
2022-04-20 09:06:41 +02:00
mmu_context.c
…
mmu_notifier.c
mm/mmu_notifier: use hlist_add_head_rcu()
2019-08-04 09:33:42 +02:00
mmzone.c
…
mprotect.c
x86/speculation/l1tf: Disallow non privileged high MMIO PROT_NONE mappings
2018-08-15 18:14:45 +02:00
mremap.c
mmmremap.c: avoid pointless invalidate_range_start/end on mremap(old_size=0)
2022-04-20 09:06:44 +02:00
msync.c
…
nobootmem.c
…
nommu.c
x86/mm: split vmalloc_sync_all()
2020-04-02 17:20:26 +02:00
oom_kill.c
mm, oom: do not trigger out_of_memory from the #PF
2021-11-26 11:48:40 +01:00
page_alloc.c
mm: page_alloc: fix building error on -Werror=array-compare
2022-04-27 13:14:10 +02:00
page_counter.c
…
page_ext.c
mm/page_ext.c: fix an imbalance with kmemleak
2019-04-05 22:29:06 +02:00
page_idle.c
mm/page_idle.c: fix oops because end_pfn is larger than max_pfn
2019-07-10 09:55:38 +02:00
page_io.c
swap: fix swapfile read/write offset
2021-03-07 11:25:59 +01:00
page_isolation.c
…
page_owner.c
…
page_poison.c
…
page-writeback.c
mm: memcontrol: fix NULL pointer crash in test_clear_page_writeback()
2021-02-23 13:59:14 +01:00
pagewalk.c
mm: pagewalk: fix termination condition in walk_pte_range()
2020-10-01 20:40:06 +02:00
percpu-km.c
…
percpu-vm.c
…
percpu.c
percpu: stop printing kernel addresses
2019-04-27 09:34:47 +02:00
pgtable-generic.c
…
process_vm_access.c
…
quicklist.c
…
readahead.c
…
rmap.c
mm: fix race between MADV_FREE reclaim and blkdev direct IO read
2022-04-20 09:06:43 +02:00
shmem.c
memfd: fix F_SEAL_WRITE after shmem huge page allocated
2022-03-08 19:00:59 +01:00
slab_common.c
mm/slab: use memzero_explicit() in kzfree()
2020-06-30 15:38:44 -04:00
slab.c
mm/slab.c: fix an infinite loop in leaks_show()
2019-06-22 08:17:13 +02:00
slab.h
mm: kmemleak: slob: respect SLAB_NOLEAKTRACE flag
2021-11-26 11:48:42 +01:00
slob.c
…
slub.c
Revert "mm, slub: consider rest of partial list if acquire_slab() fails"
2021-03-17 16:10:14 +01:00
sparse-vmemmap.c
…
sparse.c
…
swap_cgroup.c
…
swap_state.c
mm: fix swap cache node allocation mask
2020-07-09 09:35:54 +02:00
swap.c
…
swapfile.c
swap: fix swapfile read/write offset
2021-03-07 11:25:59 +01:00
truncate.c
mm: cleancache: fix corruption on missed inode invalidation
2018-12-08 13:05:09 +01:00
usercopy.c
usercopy: Avoid HIGHMEM pfn warning
2019-10-17 13:42:06 -07:00
userfaultfd.c
mm: userfaultfd: fix missing cache flush in mcopy_atomic_pte() and __mcopy_atomic()
2022-05-15 19:39:17 +02:00
util.c
mm: page_mapped: don't assume compound page is huge or THP
2019-01-16 22:12:32 +01:00
vmacache.c
mm: get rid of vmacache_flush_all() entirely
2018-09-19 22:47:17 +02:00
vmalloc.c
mm/vmalloc.c: don't dereference possible NULL pointer in __vunmap()
2020-06-03 08:16:47 +02:00
vmpressure.c
…
vmscan.c
mm: remove seemingly spurious reclaimability check from laptop_mode gating
2018-09-19 22:47:12 +02:00
vmstat.c
mm, vmstat: drop zone->lock in /proc/pagetypeinfo
2021-06-03 08:23:27 +02:00
workingset.c
…
z3fold.c
…
zbud.c
…
zpool.c
…
zsmalloc.c
mm/zsmalloc.c: close race window between zs_pool_dec_isolated() and zs_unregister_migration()
2021-11-26 11:48:39 +01:00
zswap.c
zswap: re-check zswap_is_full() after do zswap_shrink()
2018-09-05 09:20:02 +02:00