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Fan Yang 78385480fd mm: Fix mremap not considering huge pmd devmap 
commit 5bfea2d9b1 upstream.

The original code in mm/mremap.c checks huge pmd by:

		if (is_swap_pmd(*old_pmd) || pmd_trans_huge(*old_pmd)) {

However, a DAX mapped nvdimm is mapped as huge page (by default) but it
is not transparent huge page (_PAGE_PSE | PAGE_DEVMAP).  This commit
changes the condition to include the case.

This addresses CVE-2020-10757.

Fixes: 5c7fb56e5e ("mm, dax: dax-pmd vs thp-pmd vs hugetlbfs-pmd")
Cc: <stable@vger.kernel.org>
Reported-by: Fan Yang <Fan_Yang@sjtu.edu.cn>
Signed-off-by: Fan Yang <Fan_Yang@sjtu.edu.cn>
Tested-by: Fan Yang <Fan_Yang@sjtu.edu.cn>
Tested-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-06-07 13:17:53 +02:00
..
kasan
…
backing-dev.c
writeback: synchronize sync(2) against cgroup writeback membership switches
2019-03-05 17:58:50 +01:00
balloon_compaction.c
…
bootmem.c
…
cleancache.c
…
cma_debug.c
mm/cma_debug.c: fix the break condition in cma_maxchunk_get()
2019-06-15 11:54:01 +02:00
cma.c
mm/cma.c: fail if fixed declaration can't be honored
2019-08-06 19:06:51 +02:00
cma.h
…
compaction.c
mm/compaction.c: clear total_{migrate,free}_scanned before scanning a new zone
2019-10-05 13:10:13 +02:00
debug_page_ref.c
…
debug.c
…
dmapool.c
…
early_ioremap.c
…
fadvise.c
…
failslab.c
…
filemap.c
mm/filemap.c: don't initiate writeback if mapping has no dirty pages
2019-11-12 19:21:20 +01:00
frame_vector.c
…
frontswap.c
…
gup_benchmark.c
mm/gup_benchmark.c: prevent integer overflow in ioctl
2019-12-01 09:17:07 +01:00
gup.c
mm/gup.c: remove some BUG_ONs from get_gate_page()
2019-07-31 07:27:08 +02:00
highmem.c
…
hmm.c
mm/memory_hotplug: shrink zones when offlining memory
2020-01-29 16:43:27 +01:00
huge_memory.c
mm: fix possible PMD dirty bit lost in set_pmd_migration_entry()
2020-03-11 14:15:00 +01:00
hugetlb_cgroup.c
mm: hugetlb: switch to css_tryget() in hugetlb_cgroup_charge_cgroup()
2019-11-20 18:45:20 +01:00
hugetlb.c
mm/hugetlb: fix a addressing exception caused by huge_pte_offset
2020-04-29 16:31:27 +02:00
hwpoison-inject.c
…
init-mm.c
…
internal.h
vmscan: return NODE_RECLAIM_NOSCAN in node_reclaim() when CONFIG_NUMA is n
2019-12-05 09:20:57 +01:00
interval_tree.c
…
Kconfig
mm/hmm: select mmu notifier when selecting HMM
2019-06-15 11:54:00 +02:00
Kconfig.debug
…
khugepaged.c
coredump: fix race condition between collapse_huge_page() and core dumping
2019-06-22 08:15:21 +02:00
kmemleak-test.c
…
kmemleak.c
Revert "kmemleak: allow to coexist with fault injection"
2019-08-25 10:47:58 +02:00
ksm.c
mm/ksm: fix NULL pointer dereference when KSM zero page is enabled
2020-04-29 16:31:28 +02:00
list_lru.c
mm/list_lru.c: fix memory leak in __memcg_init_list_lru_node
2019-06-19 08:17:59 +02:00
maccess.c
…
madvise.c
…
Makefile
…
memblock.c
mm/page_alloc.c: deduplicate __memblock_free_early() and memblock_free()
2019-12-05 09:20:58 +01:00
memcontrol.c
memcg: fix NULL pointer dereference in __mem_cgroup_usage_unregister_event
2020-03-25 08:06:12 +01:00
memfd.c
memfd: Use radix_tree_deref_slot_protected to avoid the warning.
2019-11-20 18:47:53 +01:00
memory_hotplug.c
mm/memory_hotplug: fix remove_memory() lockdep splat
2020-02-11 04:33:56 -08:00
memory-failure.c
mm/memory-failure: poison read receives SIGKILL instead of SIGBUS if mmaped more than once
2019-10-29 09:19:59 +01:00
memory.c
mm, thp, proc: report THP eligibility for each vma
2019-12-17 20:35:45 +01:00
mempolicy.c
mm: mempolicy: require at least one nodeid for MPOL_PREFERRED
2020-04-13 10:45:06 +02:00
mempool.c
…
memtest.c
…
migrate.c
mm: move_pages: report the number of non-attempted pages
2020-02-11 04:33:56 -08:00
mincore.c
mm/mincore.c: make mincore() more conservative
2019-05-22 07:37:40 +02:00
mlock.c
mm/mlock.c: change count_mm_mlocked_page_nr return type
2019-07-10 09:53:40 +02:00
mm_init.c
…
mmap.c
arm64: Revert support for execute-only user mappings
2020-01-09 10:19:03 +01:00
mmu_context.c
…
mmu_notifier.c
mm/mmu_notifier: use hlist_add_head_rcu()
2019-07-31 07:27:08 +02:00
mmzone.c
…
mprotect.c
mm, numa: fix bad pmd by atomically check for pmd_trans_huge when marking page tables prot_numa
2020-03-11 14:15:00 +01:00
mremap.c
mm: Fix mremap not considering huge pmd devmap
2020-06-07 13:17:53 +02:00
msync.c
…
nobootmem.c
…
nommu.c
x86/mm: split vmalloc_sync_all()
2020-03-25 08:06:13 +01:00
oom_kill.c
memcg, oom: don't require __GFP_FS when invoking memcg OOM killer
2019-10-05 13:10:07 +02:00
page_alloc.c
mm/page_alloc: fix watchdog soft lockups during set_zone_contiguous()
2020-05-14 07:57:21 +02:00
page_counter.c
…
page_ext.c
mm/page_ext.c: fix an imbalance with kmemleak
2019-04-05 22:32:58 +02:00
page_idle.c
mm/page_idle.c: fix oops because end_pfn is larger than max_pfn
2019-07-03 13:14:45 +02:00
page_io.c
mm/page_io.c: do not free shared swap slots
2019-12-01 09:17:35 +01:00
page_isolation.c
…
page_owner.c
mm/page_owner: don't access uninitialized memmaps when reading /proc/pagetypeinfo
2019-10-29 09:19:58 +01:00
page_poison.c
page_poison: play nicely with KASAN
2019-04-05 22:32:59 +02:00
page_vma_mapped.c
…
page-writeback.c
mm/page-writeback.c: avoid potential division by zero in wb_min_max_ratio()
2020-01-23 08:21:31 +01:00
pagewalk.c
…
percpu-internal.h
…
percpu-km.c
percpu: convert spin_lock_irq to spin_lock_irqsave.
2019-02-12 19:47:12 +01:00
percpu-stats.c
…
percpu-vm.c
…
percpu.c
percpu: do not search past bitmap when allocating an area
2019-06-15 11:54:11 +02:00
pgtable-generic.c
…
process_vm_access.c
…
quicklist.c
…
readahead.c
…
rmap.c
mm/hmm: fix bad subpage pointer in try_to_unmap_one
2019-08-25 10:47:43 +02:00
rodata_test.c
…
shmem.c
shmem: fix possible deadlocks on shmlock_user_lock
2020-05-20 08:18:32 +02:00
slab_common.c
mm: memcg/slab: call flush_memcg_workqueue() only if memcg workqueue is valid
2020-01-23 08:21:30 +01:00
slab.c
mm/slab.c: fix an infinite loop in leaks_show()
2019-06-15 11:54:01 +02:00
slab.h
mm: add support for kmem caches in DMA32 zone
2019-04-03 06:26:28 +02:00
slob.c
…
slub.c
slub: improve bit diffusion for freelist ptr obfuscation
2020-04-17 10:48:43 +02:00
sparse-vmemmap.c
…
sparse.c
mm/memory_hotplug: remove "zone" parameter from sparse_remove_one_section
2020-01-29 16:43:26 +01:00
swap_cgroup.c
…
swap_slots.c
…
swap_state.c
…
swap.c
mm/swap: fix release_pages() when releasing devmap pages
2019-07-31 07:27:03 +02:00
swapfile.c
mm, swap: bounds check swap_info array accesses to avoid NULL derefs
2019-04-05 22:32:58 +02:00
truncate.c
mm: cleancache: fix corruption on missed inode invalidation
2018-12-05 19:32:13 +01:00
usercopy.c
usercopy: Avoid HIGHMEM pfn warning
2019-10-11 18:20:58 +02:00
userfaultfd.c
hugetlb: use same fault hash key for shared and private mappings
2019-05-22 07:37:40 +02:00
util.c
mm: page_mapped: don't assume compound page is huge or THP
2019-01-16 22:04:36 +01:00
vmacache.c
…
vmalloc.c
mm/vmalloc.c: don't dereference possible NULL pointer in __vunmap()
2020-06-03 08:19:49 +02:00
vmpressure.c
mm/vmpressure.c: fix a signedness bug in vmpressure_register_event()
2019-10-17 13:45:19 -07:00
vmscan.c
mm/vmscan.c: don't round up scan size for online memory cgroup
2020-02-28 16:38:50 +01:00
vmstat.c
mm/vmstat.c: fix NUMA statistics updates
2019-12-13 08:51:27 +01:00
workingset.c
…
z3fold.c
z3fold: fix possible reclaim races
2018-12-01 09:37:33 +01:00
zbud.c
…
zpool.c
…
zsmalloc.c
mm/zsmalloc.c: fix the migrated zspage statistics.
2020-01-09 10:19:00 +01:00
zswap.c
…