Kirill A. Shutemov 6b7339f4c3 mm: avoid setting up anonymous pages into file mapping ... Reading page fault handler code I've noticed that under right circumstances kernel would map anonymous pages into file mappings: if the VMA doesn't have vm_ops->fault() and the VMA wasn't fully populated on ->mmap(), kernel would handle page fault to not populated pte with do_anonymous_page(). Let's change page fault handler to use do_anonymous_page() only on anonymous VMA (->vm_ops == NULL) and make sure that the VMA is not shared. For file mappings without vm_ops->fault() or shred VMA without vm_ops, page fault on pte_none() entry would lead to SIGBUS. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Oleg Nesterov <oleg@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Willy Tarreau <w@1wt.eu> Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2015-07-09 11:12:48 -07:00
..
kasan	kasan: remove duplicate definition of the macro KASAN_FREE_PAGE	2015-06-25 17:00:42 -07:00
backing-dev.c	writeback: don't drain bdi_writeback_congested on bdi destruction	2015-07-02 08:46:00 -06:00
balloon_compaction.c
bootmem.c	mm: page_alloc: pass PFN to __free_pages_bootmem	2015-06-30 19:44:55 -07:00
cleancache.c	cleancache: remove limit on the number of cleancache enabled filesystems	2015-04-14 16:49:03 -07:00
cma.c	mm/memblock: add extra "flags" to memblock to allow selection of memory based on attribute	2015-06-24 17:49:44 -07:00
cma.h	mm: cma: allocation trigger	2015-04-14 16:49:00 -07:00
cma_debug.c	mm/cma_debug.c: remove blank lines before DEFINE_SIMPLE_ATTRIBUTE()	2015-04-15 16:35:20 -07:00
compaction.c	mm/compaction.c: fix "suitable_migration_target() unused" warning	2015-04-15 16:35:20 -07:00
debug-pagealloc.c
debug.c	tracing: Rename ftrace_event.h to trace_events.h	2015-05-13 14:05:12 -04:00
dmapool.c
early_ioremap.c
fadvise.c	writeback: implement and use inode_congested()	2015-06-02 08:33:35 -06:00
failslab.c
filemap.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-07-04 19:36:06 -07:00
frontswap.c	frontswap: allow multiple backends	2015-06-24 17:49:45 -07:00
gup.c	mm: use READ_ONCE() for non-scalar types	2015-04-15 16:35:18 -07:00
highmem.c
huge_memory.c	mm: clarify that the function operates on hugepage pte	2015-06-24 17:49:44 -07:00
hugetlb.c	mm/hugetlb: remove unused arch hook prepare/release_hugepage	2015-06-25 17:00:35 -07:00
hugetlb_cgroup.c
hwpoison-inject.c	mm/memory-failure: introduce get_hwpoison_page() for consistent refcount handling	2015-06-24 17:49:42 -07:00
init-mm.c
internal.h	mm: meminit: finish initialisation of struct pages before basic setup	2015-06-30 19:44:56 -07:00
interval_tree.c
Kconfig	mm: meminit: initialise a subset of struct pages if CONFIG_DEFERRED_STRUCT_PAGE_INIT is set	2015-06-30 19:44:56 -07:00
Kconfig.debug
kmemcheck.c
kmemleak-test.c
kmemleak.c	mm: kmemleak_alloc_percpu() should follow the gfp from per_alloc()	2015-06-24 17:49:46 -07:00
ksm.c	mm: remove rest of ACCESS_ONCE() usages	2015-04-15 16:35:18 -07:00
list_lru.c
maccess.c
madvise.c	writeback: separate out include/linux/backing-dev-defs.h	2015-06-02 08:33:34 -06:00
Makefile	mm: move memtest under mm	2015-04-14 16:49:06 -07:00
memblock.c	mm: page_alloc: pass PFN to __free_pages_bootmem	2015-06-30 19:44:55 -07:00
memcontrol.c	Merge branch 'for-4.2/writeback' of git://git.kernel.dk/linux-block	2015-06-25 16:00:17 -07:00
memory-failure.c	tracing: add trace event for memory-failure	2015-06-24 17:49:43 -07:00
memory.c	mm: avoid setting up anonymous pages into file mapping	2015-07-09 11:12:48 -07:00
memory_hotplug.c	mm/memory hotplug: print the last vmemmap region at the end of hot add memory	2015-06-24 17:49:45 -07:00
mempolicy.c	mm, thp: respect MPOL_PREFERRED policy with non-local node	2015-06-24 17:49:46 -07:00
mempool.c	mm/mempool.c: kasan: poison mempool elements	2015-04-15 16:35:20 -07:00
memtest.c	mm/memblock: add extra "flags" to memblock to allow selection of memory based on attribute	2015-06-24 17:49:44 -07:00
migrate.c	mm: clarify that the function operates on hugepage pte	2015-06-24 17:49:44 -07:00
mincore.c
mlock.c	mm: move mm_populate()-related code to mm/gup.c	2015-04-14 16:49:00 -07:00
mm_init.c	mm: meminit: remove mminit_verify_page_links	2015-06-30 19:44:56 -07:00
mmap.c	mm/mmap.c: optimization of do_mmap_pgoff function	2015-06-24 17:49:45 -07:00
mmu_context.c
mmu_notifier.c
mmzone.c
mprotect.c	mm: fix mprotect() behaviour on VM_LOCKED VMAs	2015-06-24 17:49:41 -07:00
mremap.c	mm: new arch_remap() hook	2015-06-24 17:49:41 -07:00
msync.c
nobootmem.c	mm: page_alloc: pass PFN to __free_pages_bootmem	2015-06-30 19:44:55 -07:00
nommu.c	Replace module_init with appropriate alternate initcall in non modules.	2015-07-02 10:36:29 -07:00
oom_kill.c	mm/oom_kill.c: print points as unsigned int	2015-06-24 17:49:44 -07:00
page-writeback.c	Merge branch 'for-4.2/writeback' of git://git.kernel.dk/linux-block	2015-06-25 16:00:17 -07:00
page_alloc.c	mm: meminit: finish initialisation of struct pages before basic setup	2015-06-30 19:44:56 -07:00
page_counter.c
page_ext.c
page_io.c	suspend: simplify block I/O handling	2015-05-19 09:19:59 -06:00
page_isolation.c	CMA: page_isolation: check buddy before accessing it	2015-05-14 17:55:51 -07:00
page_owner.c	mm/page_owner.c: use late_initcall to hook in enabling	2015-06-16 14:12:35 -04:00
pagewalk.c	mm/pagewalk.c: prevent positive return value of walk_page_test() from being passed to callers	2015-03-25 16:20:30 -07:00
percpu-km.c
percpu-vm.c
percpu.c	mm: kmemleak_alloc_percpu() should follow the gfp from per_alloc()	2015-06-24 17:49:46 -07:00
pgtable-generic.c	mm: clarify that the function operates on hugepage pte	2015-06-24 17:49:44 -07:00
process_vm_access.c	process_vm_access: switch to {compat_,}import_iovec()	2015-04-11 22:27:12 -04:00
quicklist.c
readahead.c	writeback: implement and use inode_congested()	2015-06-02 08:33:35 -06:00
rmap.c	Merge branch 'for-4.2/writeback' of git://git.kernel.dk/linux-block	2015-06-25 16:00:17 -07:00
shmem.c	tmpfs: truncate prealloc blocks past i_size	2015-06-24 17:49:45 -07:00
slab.c	slab: correct size_index table before replacing the bootstrap kmem_cache_node	2015-06-24 17:49:41 -07:00
slab.h	slab: correct size_index table before replacing the bootstrap kmem_cache_node	2015-06-24 17:49:41 -07:00
slab_common.c	Add __init attribute to new_kmalloc_cache	2015-07-01 14:22:33 -07:00
slob.c	slob: make slob_alloc_node() static and remove EXPORT_SYMBOL()	2015-04-14 16:48:59 -07:00
slub.c	slab: correct size_index table before replacing the bootstrap kmem_cache_node	2015-06-24 17:49:41 -07:00
sparse-vmemmap.c
sparse.c
swap.c	mm: drop bogus VM_BUG_ON_PAGE assert in put_page() codepath	2015-06-24 17:49:42 -07:00
swap_cgroup.c
swap_state.c	mm: remove rest of ACCESS_ONCE() usages	2015-04-15 16:35:18 -07:00
swapfile.c	vfs: add seq_file_path() helper	2015-06-23 18:01:07 -04:00
truncate.c	memcg: add per cgroup dirty page accounting	2015-06-02 08:33:33 -06:00
util.c	mm: uninline and cleanup page-mapping related helpers	2015-04-15 16:35:19 -07:00
vmacache.c
vmalloc.c	mm/vmalloc: get rid of dirty bitmap inside vmap_block structure	2015-04-15 16:35:18 -07:00
vmpressure.c
vmscan.c	mm: meminit: finish initialisation of struct pages before basic setup	2015-06-30 19:44:56 -07:00
vmstat.c
workingset.c
zbud.c	zpool: remove zpool_evict()	2015-06-25 17:00:37 -07:00
zpool.c	zpool: remove zpool_evict()	2015-06-25 17:00:37 -07:00
zsmalloc.c	zpool: remove zpool_evict()	2015-06-25 17:00:37 -07:00
zswap.c	zswap: runtime enable/disable	2015-06-25 17:00:37 -07:00