Oleg Nesterov d079aac846 mm: mmap_region: kill correct_wcount/inode, use allow_write_access() ... correct_wcount and inode in mmap_region() just complicate the code. This boolean was needed previously, when deny_write_access() was called before vma_merge(), now we can simply check VM_DENYWRITE and do allow_write_access() if it is set. allow_write_access() checks file != NULL, so this is safe even if it was possible to use VM_DENYWRITE && !file. Just we need to ensure we use the same file which was deny_write_access()'ed, so the patch also moves "file = vma->vm_file" down after allow_write_access(). Change-Id: I80d3674ce40fb97a80b128ea63edc86ca1770d20 Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Colin Cross <ccross@android.com> Cc: David Rientjes <rientjes@google.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2020-12-07 21:05:26 +03:00
..
backing-dev.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
bootmem.c	mm: sparse: fix usemap allocation above node descriptor section	2016-10-29 23:12:12 +08:00
bounce.c
cleancache.c
compaction.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
debug-pagealloc.c
dmapool.c
fadvise.c
failslab.c
filemap.c	lib/radix-tree.c: make radix_tree_node_alloc() work correctly within interrupt	2020-12-07 21:02:05 +03:00
filemap_xip.c	mm: kill vma flag VM_CAN_NONLINEAR	2020-11-29 16:11:40 +03:00
fremap.c	mm: kill vma flag VM_CAN_NONLINEAR	2020-11-29 16:11:40 +03:00
highmem.c
huge_memory.c
hugetlb.c	Fix incomplete backport of commit 0f792cf949a0	2016-10-26 23:15:44 +08:00
hwpoison-inject.c
init-mm.c
internal.h	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
Kconfig	BACKPORT: mm/zsmalloc: add statistics support	2018-01-01 21:27:09 +03:00
Kconfig.debug
kmemcheck.c
kmemleak-test.c
kmemleak.c	mm: kmemleak: allow safe memory scanning during kmemleak disabling	2015-10-22 09:20:06 +08:00
ksm.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
maccess.c
madvise.c	mm/fs: route MADV_REMOVE to FALLOC_FL_PUNCH_HOLE	2020-12-07 21:00:58 +03:00
Makefile	BACKPORT: mm/zpool: implement common zpool api to zbud/zsmalloc	2018-01-01 21:27:00 +03:00
memblock.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
memcontrol.c	shmem: replace page if mapping excludes its zone	2020-12-07 20:57:06 +03:00
memory-failure.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
memory.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
memory_hotplug.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
mempolicy.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
mempool.c
migrate.c	BACKPORT: Sanitize 'move_pages()' permission checks	2018-01-13 17:13:40 +03:00
mincore.c	swap: make each swap partition have one address_space	2018-01-01 22:02:05 +03:00
mlock.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
mm_init.c
mmap.c	mm: mmap_region: kill correct_wcount/inode, use allow_write_access()	2020-12-07 21:05:26 +03:00
mmu_context.c
mmu_notifier.c
mmzone.c
mprotect.c
mremap.c
msync.c
nobootmem.c
nommu.c	mm: kill vma flag VM_CAN_NONLINEAR	2020-11-29 16:11:40 +03:00
oom_kill.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
page-writeback.c	mm: fix calculation of dirtyable memory	2016-10-29 23:12:16 +08:00
page_alloc.c	mm/page_alloc.c: use '__paginginit' instead of '__init'	2017-12-27 17:13:39 +03:00
page_cgroup.c
page_io.c
page_isolation.c
pagewalk.c
percpu-km.c
percpu-vm.c
percpu.c
pgtable-generic.c
prio_tree.c
process_vm_access.c
quicklist.c
readahead.c	mm: change initial readahead window size calculation	2016-10-29 23:12:18 +08:00
rmap.c
shmem.c	shmem: fix splicing from a hole while it's punched	2020-12-07 21:05:20 +03:00
slab.c
slob.c
slub.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
sparse-vmemmap.c
sparse.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
swap.c	swap: make each swap partition have one address_space	2018-01-01 22:02:05 +03:00
swap_state.c	lib/radix-tree.c: make radix_tree_node_alloc() work correctly within interrupt	2020-12-07 21:02:05 +03:00
swapfile.c	vfs: make path_openat take a struct filename pointer	2018-12-07 22:28:48 +04:00
thrash.c
truncate.c	mm/fs: remove truncate_range	2020-12-07 20:57:30 +03:00
util.c	swap: make each swap partition have one address_space	2018-01-01 22:02:05 +03:00
vmalloc.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
vmscan.c	mm: new shrinker API	2020-11-29 16:11:30 +03:00
vmstat.c	Merge remote-tracking branch 'stable/linux-3.4.y' into lineage-15.1	2017-12-27 17:13:15 +03:00
zpool.c	BACKPORT: mm/zpool: add name argument to create zpool	2018-01-01 21:27:09 +03:00
zsmalloc.c	UPSTREAM: zsmalloc: fix a null pointer dereference in destroy_handle_cache()	2018-01-01 21:27:14 +03:00