Minchan Kim c5c893e7c4 mm: do not access page->mapping directly on page_endio ... commit dd8416c47715cf324c9a16f13273f9fda87acfed upstream. With rw_page, page_endio is used for completing IO on a page and it propagates write error to the address space if the IO fails. The problem is it accesses page->mapping directly which might be okay for file-backed pages but it shouldn't for anonymous page. Otherwise, it can corrupt one of field from anon_vma under us and system goes panic randomly. swap_writepage bdev_writepage ops->rw_page I encountered the BUG during developing new zram feature and it was really hard to figure it out because it made random crash, somtime mmap_sem lockdep, sometime other places where places never related to zram/zsmalloc, and not reproducible with some configuration. When I consider how that bug is subtle and people do fast-swap test with brd, it's worth to add stable mark, I think. Fixes: dd6bd0d9c7 ("swap: use bdev_read_page() / bdev_write_page()") Signed-off-by: Minchan Kim <minchan@kernel.org> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Matthew Wilcox <willy@infradead.org> 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>		2017-03-12 06:37:25 +01:00
..
kasan	kasan: update kasan_global for gcc 7	2016-12-08 07:15:24 +01:00
backing-dev.c	block: fix double-free in the failure path of cgwb_bdi_init()	2017-02-26 11:07:51 +01:00
balloon_compaction.c	virtio_balloon: fix race between migration and ballooning	2016-03-03 15:07:18 -08:00
bootmem.c
cleancache.c
cma_debug.c
cma.c	mm/cma: silence warnings due to max() usage	2016-11-10 16:36:36 +01:00
cma.h
compaction.c	mm, compaction: prevent VM_BUG_ON when terminating freeing scanner	2016-08-10 11:49:25 +02:00
debug-pagealloc.c
debug.c	mm: make compound_head() robust	2015-11-06 17:50:42 -08:00
dmapool.c	mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd	2015-11-06 17:50:42 -08:00
early_ioremap.c
fadvise.c
failslab.c	mm, page_alloc: rename __GFP_WAIT to __GFP_RECLAIM	2015-11-06 17:50:42 -08:00
filemap.c	mm: do not access page->mapping directly on page_endio	2017-03-12 06:37:25 +01:00
frame_vector.c
frontswap.c
gup.c	mm: remove gup_flags FOLL_WRITE games from __get_user_pages()	2016-10-20 10:00:47 +02:00
highmem.c
huge_memory.c	mm/huge_memory: replace VM_NO_THP VM_BUG_ON with actual VMA check	2016-05-04 14:48:49 -07:00
hugetlb_cgroup.c	mm: make compound_head() robust	2015-11-06 17:50:42 -08:00
hugetlb.c	mm/hugetlb.c: fix reservation race when freeing surplus pages	2017-01-19 20:17:19 +01:00
hwpoison-inject.c
init-mm.c	mm: Add a user_ns owner to mm_struct and fix ptrace permission checks	2017-01-06 11:16:11 +01:00
internal.h	mm, sl[au]b: add __GFP_ATOMIC to the GFP reclaim mask	2016-08-10 11:49:25 +02:00
interval_tree.c
Kconfig	mm: make compound_head() robust	2015-11-06 17:50:42 -08:00
Kconfig.debug
kmemcheck.c
kmemleak-test.c
kmemleak.c
ksm.c	mm,ksm: fix endless looping in allocating memory when ksm enable	2016-10-07 15:23:40 +02:00
list_lru.c	mm/list_lru.c: avoid error-path NULL pointer deref	2016-11-10 16:36:32 +01:00
maccess.c
madvise.c
Makefile
memblock.c
memcontrol.c	mm, memcg: do not retry precharge charges	2017-02-01 08:30:54 +01:00
memory_hotplug.c	base/memory, hotplug: fix a kernel oops in show_valid_zones()	2017-02-09 08:02:47 +01:00
memory-failure.c	mm: soft-offline: check return value in second __get_any_page() call	2016-02-25 12:01:21 -08:00
memory.c	numa: fix /proc/<pid>/numa_maps for THP	2016-05-04 14:48:49 -07:00
mempolicy.c	mm/mempolicy.c: do not put mempolicy before using its nodemask	2017-02-01 08:30:52 +01:00
mempool.c	mm, page_alloc: distinguish between being unable to sleep, unwilling to sleep and avoiding waking kswapd	2015-11-06 17:50:42 -08:00
memtest.c
migrate.c	mm: Export migrate_page_move_mapping and migrate_page_copy	2016-07-27 09:47:31 -07:00
mincore.c
mlock.c	mm: fix mlock accouting	2016-02-25 12:01:21 -08:00
mm_init.c
mmap.c	mm: fix regression in remap_file_pages() emulation	2016-02-25 12:01:21 -08:00
mmu_context.c
mmu_notifier.c
mmzone.c
mprotect.c
mremap.c
msync.c
nobootmem.c
nommu.c
oom_kill.c	mm/oom_kill.c: avoid attempting to kill init sharing same memory	2015-12-12 10:15:34 -08:00
page_alloc.c	mm/page_alloc: fix nodes for reclaim in fast path	2017-03-12 06:37:25 +01:00
page_counter.c
page_ext.c
page_idle.c
page_io.c
page_isolation.c	mm: fix invalid node in alloc_migrate_target()	2016-04-20 15:41:53 +09:00
page_owner.c
page-writeback.c	writeback: use higher precision calculation in domain_dirty_limits()	2016-07-27 09:47:29 -07:00
pagewalk.c
percpu-km.c
percpu-vm.c
percpu.c	percpu: fix synchronization between synchronous map extension and chunk destruction	2016-07-27 09:47:33 -07:00
pgtable-generic.c	mm,thp: khugepaged: call pte flush at the time of collapse	2016-02-25 12:01:23 -08:00
process_vm_access.c	ptrace: use fsuid, fsgid, effective creds for fs access checks	2016-02-25 12:01:16 -08:00
quicklist.c
readahead.c	mm, fs: introduce mapping_gfp_constraint()	2015-11-06 17:50:42 -08:00
rmap.c
shmem.c	tmpfs: fix regression hang in fallocate undo	2016-07-27 09:47:40 -07:00
slab_common.c	mm: memcontrol: fix cgroup creation failure after many small jobs	2016-08-16 09:30:51 +02:00
slab.c	slab/slub: adjust kmem_cache_alloc_bulk API	2015-11-22 11:58:44 -08:00
slab.h	slab/slub: adjust kmem_cache_alloc_bulk API	2015-11-22 11:58:44 -08:00
slob.c	slab/slub: adjust kmem_cache_alloc_bulk API	2015-11-22 11:58:44 -08:00
slub.c	slub: clean up code for kmem cgroup support to kmem_cache_free_bulk	2016-05-04 14:48:49 -07:00
sparse-vmemmap.c
sparse.c
swap_cgroup.c
swap_state.c
swap.c	mm: make compound_head() robust	2015-11-06 17:50:42 -08:00
swapfile.c	swapfile: fix memory corruption via malformed swapfile	2016-11-18 10:48:34 +01:00
truncate.c
userfaultfd.c
util.c	proc: revert /proc/<pid>/maps [stack:TID] annotation	2016-09-15 08:27:46 +02:00
vmacache.c
vmalloc.c	mm: vmalloc: don't remove inexistent guard hole in remove_vm_area()	2015-11-20 16:17:32 -08:00
vmpressure.c	mm: vmpressure: fix sending wrong events on underflow	2017-03-12 06:37:25 +01:00
vmscan.c	mm/vmscan.c: set correct defer count for shrinker	2017-01-06 11:16:14 +01:00
vmstat.c	vmstat: allocate vmstat_wq before it is used	2016-01-08 23:47:54 -08:00
workingset.c	mm: workingset: fix crash in shadow node shrinker caused by replace_page_cache_page()	2016-10-28 03:01:34 -04:00
zbud.c	mm: zsmalloc: constify struct zs_pool name	2015-11-06 17:50:42 -08:00
zpool.c	mm: zsmalloc: constify struct zs_pool name	2015-11-06 17:50:42 -08:00
zsmalloc.c	zsmalloc: fix zs_can_compact() integer overflow	2016-05-18 17:06:44 -07:00
zswap.c	zswap: disable changing params if init fails	2017-02-09 08:02:45 +01:00