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android_kernel_asus_sm8350/fs
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Konstantin Khlebnikov 05fbf357d9 proc/pagemap: walk page tables under pte lock 
Lockless access to pte in pagemap_pte_range() might race with page
migration and trigger BUG_ON(!PageLocked()) in migration_entry_to_page():

CPU A (pagemap)                           CPU B (migration)
                                          lock_page()
                                          try_to_unmap(page, TTU_MIGRATION...)
                                               make_migration_entry()
                                               set_pte_at()
<read *pte>
pte_to_pagemap_entry()
                                          remove_migration_ptes()
                                          unlock_page()
    if(is_migration_entry())
        migration_entry_to_page()
            BUG_ON(!PageLocked(page))

Also lockless read might be non-atomic if pte is larger than wordsize.
Other pte walkers (smaps, numa_maps, clear_refs) already lock ptes.

Fixes: 052fb0d635df ("proc: report file/anon bit in /proc/pid/pagemap")
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Reported-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Reviewed-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: <stable@vger.kernel.org>	[3.5+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-11 17:06:05 -08:00
..
9p
mm: drop vm_ops->remap_pages and generic_file_remap_pages() stub
2015-02-10 14:30:30 -08:00
adfs
adfs: add __printf verification, fix format/argument mismatches
2014-08-08 15:57:24 -07:00
affs
fs/affs/file.c: remove obsolete pagesize check
2014-12-13 12:42:52 -08:00
afs
rxrpc: make the users of rxrpc_kernel_send_data() set kvec-backed msg_iter properly
2015-02-04 01:34:14 -05:00
autofs4
assorted conversions to %p[dD]
2014-11-19 13:01:20 -05:00
befs
befs: remove dead code
2014-12-13 12:42:51 -08:00
bfs
fs/bfs: use bfs prefix for dump_imap
2014-08-08 15:57:24 -07:00
btrfs
page_writeback: put account_page_redirty() after set_page_dirty()
2015-02-11 17:06:04 -08:00
cachefiles
assorted conversions to %p[dD]
2014-11-19 13:01:20 -05:00
ceph
Merge branch 'akpm' (patches from Andrew)
2015-02-10 16:45:56 -08:00
cifs
Merge branch 'akpm' (patches from Andrew)
2015-02-10 16:45:56 -08:00
coda
coda_venus_readdir(): use file_inode()
2014-12-11 16:28:12 -05:00
configfs
assorted conversions to %p[dD]
2014-11-19 13:01:20 -05:00
cramfs
fs/cramfs/inode.c: use linux/uaccess.h
2014-08-08 15:57:25 -07:00
debugfs
Driver core patches for 3.19-rc1
2014-12-14 16:10:09 -08:00
devpts
fs/devpts/inode.c: convert printk to pr_foo()
2014-06-06 16:08:14 -07:00
dlm
netlink: make nlmsg_end() and genlmsg_end() void
2015-01-18 01:03:45 -05:00
ecryptfs
Fixes for filename decryption and encrypted view plus a cleanup
2014-12-19 18:15:12 -08:00
efivarfs
* Move efivarfs from the misc filesystem section to pseudo filesystem,
2015-01-29 19:16:40 +01:00
efs
fs/efs/namei.c: return is not a function
2014-08-08 15:57:18 -07:00
exofs
Boaz Harrosh - Fix broken email address
2014-10-19 20:22:32 +03:00
exportfs
move d_rcu from overlapping d_child to overlapping d_alias
2014-11-03 15:20:29 -05:00
ext2
ext2: Convert to private i_dquot field
2014-11-10 10:06:10 +01:00
ext3
ext3: destroy sbi mutexes in put_super
2015-01-05 11:13:55 +01:00
ext4
Merge branch 'akpm' (patches from Andrew)
2015-02-10 16:45:56 -08:00
f2fs
mm: drop vm_ops->remap_pages and generic_file_remap_pages() stub
2015-02-10 14:30:30 -08:00
fat
fat: fix data past EOF resulting from fsx testsuite
2014-12-13 12:42:51 -08:00
freevxfs
…
fscache
fs/fscache/object-list.c: use __seq_open_private()
2014-10-13 17:52:21 +01:00
fuse
mm: drop vm_ops->remap_pages and generic_file_remap_pages() stub
2015-02-10 14:30:30 -08:00
gfs2
Merge branch 'akpm' (patches from Andrew)
2015-02-10 16:45:56 -08:00
hfs
fs/hfs/catalog.c: fix comparison bug in hfs_cat_keycmp
2014-12-10 17:41:16 -08:00
hfsplus
hfsplus: fix longname handling
2014-12-18 19:08:10 -08:00
hostfs
hostfs: support rename flags
2014-08-07 14:40:09 -04:00
hpfs
fs/hpfs/dnode.c: fix suspect code indent
2014-08-08 15:57:22 -07:00
hppfs
vfs: make first argument of dir_context.actor typed
2014-10-31 17:48:54 -04:00
hugetlbfs
mm: convert i_mmap_mutex to rwsem
2014-12-13 12:42:45 -08:00
isofs
isofs: Fix bug in the way to check if the year is a leap year
2015-01-07 09:51:49 +01:00
jbd
jbd: Deletion of an unnecessary check before the function call "iput"
2014-11-18 10:15:29 +01:00
jbd2
Lots of bugs fixes, including Zheng and Jan's extent status shrinker
2014-12-12 09:28:03 -08:00
jffs2
jffs2: Drop bogus if in comment
2014-11-28 18:23:44 -08:00
jfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-12-10 16:10:49 -08:00
kernfs
kernfs: Fix kernfs_name_compare
2015-01-09 15:51:08 -08:00
lockd
File locking related changes for v3.20 (pile #1)
2015-02-10 15:34:42 -08:00
logfs
fs/logfs/readwrite.c: kernel-doc warning fixes
2014-08-06 18:01:12 -07:00
minix
minix zmap block counts calculation fix
2014-08-08 15:57:20 -07:00
ncpfs
Merge branch 'akpm' (patchbomb from Andrew)
2014-12-10 18:34:42 -08:00
nfs
Merge branch 'akpm' (patches from Andrew)
2015-02-10 16:45:56 -08:00
nfs_common
lockd: move lockd's grace period handling into its own module
2014-09-17 16:33:11 -04:00
nfsd
locks: clean up the lm_change prototype
2015-01-16 16:08:50 -05:00
nilfs2
mm: drop vm_ops->remap_pages and generic_file_remap_pages() stub
2015-02-10 14:30:30 -08:00
nls
…
notify
fanotify: don't set FAN_ONDIR implicitly on a marks ignored mask
2015-02-10 14:30:28 -08:00
ntfs
assorted conversions to %p[dD]
2014-11-19 13:01:20 -05:00
ocfs2
Merge branch 'akpm' (patches from Andrew)
2015-02-10 16:45:56 -08:00
omfs
FS/OMFS: block number sanity check during fill_super operation
2014-10-14 02:18:22 +02:00
openpromfs
…
overlayfs
Merge branch 'iov_iter' into for-next
2014-12-08 20:39:29 -05:00
proc
proc/pagemap: walk page tables under pte lock
2015-02-11 17:06:05 -08:00
pstore
Driver core patches for 3.19-rc1
2014-12-14 16:10:09 -08:00
qnx4
…
qnx6
fs/qnx6: update debugging to current functions
2014-08-08 15:57:26 -07:00
quota
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2015-02-10 15:52:38 -08:00
ramfs
fs/ramfs/file-nommu.c: replace count*size kzalloc by kcalloc
2014-08-08 15:57:18 -07:00
reiserfs
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2014-12-16 15:46:01 -08:00
romfs
fs/romfs/super.c: add blank line after declarations
2014-08-08 15:57:25 -07:00
squashfs
Squashfs: Add LZ4 compression configuration option
2014-11-27 18:48:44 +00:00
sysfs
sysfs/kernfs: make read requests on pre-alloc files use the buffer.
2014-11-07 10:54:38 -08:00
sysv
write_iter variants of {__,}generic_file_aio_write()
2014-05-06 17:38:00 -04:00
ubifs
mm: drop vm_ops->remap_pages and generic_file_remap_pages() stub
2015-02-10 14:30:30 -08:00
udf
udf: remove bool assignment to 0/1
2015-02-05 16:34:25 +01:00
ufs
fs/ufs/balloc.c: remove unused variable
2014-10-14 02:18:20 +02:00
xfs
Merge branch 'akpm' (patches from Andrew)
2015-02-10 16:45:56 -08:00
aio.c
aio: annotate aio_read_event_ring for sleep patterns
2015-02-03 19:29:05 -05:00
anon_inodes.c
…
attr.c
fs,userns: Change inode_capable to capable_wrt_inode_uidgid
2014-06-10 13:57:22 -07:00
bad_inode.c
bad_inode: add ->rename2()
2014-08-07 14:40:09 -04:00
binfmt_aout.c
assorted conversions to %p[dD]
2014-11-19 13:01:20 -05:00
binfmt_elf_fdpic.c
handle suicide on late failure exits in execve() in search_binary_handler()
2014-10-09 02:39:00 -04:00
binfmt_elf.c
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
2014-12-11 17:56:37 -08:00
binfmt_em86.c
syscalls: implement execveat() system call
2014-12-13 12:42:51 -08:00
binfmt_flat.c
fs/binfmt_flat.c: make old_reloc() static
2014-06-04 16:54:21 -07:00
binfmt_misc.c
unfuck binfmt_misc.c (broken by commit e6084d4)
2014-12-17 08:27:14 -05:00
binfmt_script.c
syscalls: implement execveat() system call
2014-12-13 12:42:51 -08:00
binfmt_som.c
…
block_dev.c
fs: add freeze_super/thaw_super fs hooks
2014-11-17 10:35:17 +00:00
buffer.c
fs: clarify rate limit suppressed buffer I/O errors
2014-10-21 13:55:11 -06:00
char_dev.c
fs/char_dev.c: remove pointless assignment from __register_chrdev_region()
2014-12-10 17:41:04 -08:00
compat_binfmt_elf.c
…
compat_ioctl.c
Bluetooth: Move HCI socket definitions into its own header file
2014-07-11 13:53:04 +03:00
compat.c
vfs: make first argument of dir_context.actor typed
2014-10-31 17:48:54 -04:00
coredump.c
coredump: add %i/%I in core_pattern to report the tid of the crashed thread
2014-10-14 02:18:21 +02:00
dcache.c
Merge branch 'iov_iter' into for-next
2014-12-08 20:39:29 -05:00
dcookies.c
…
direct-io.c
fuse: honour max_read and max_write in direct_io mode
2014-09-26 21:16:51 -04:00
drop_caches.c
mm: vmscan: invoke slab shrinkers from shrink_zone()
2014-12-13 12:42:48 -08:00
eventfd.c
fs: Convert show_fdinfo functions to void
2014-11-05 14:13:23 -05:00
eventpoll.c
fs: Convert show_fdinfo functions to void
2014-11-05 14:13:23 -05:00
exec.c
syscalls: implement execveat() system call
2014-12-13 12:42:51 -08:00
fcntl.c
vfs: renumber FMODE_NONOTIFY and add to uniqueness check
2015-01-08 15:10:52 -08:00
fhandle.c
…
file_table.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-10-13 11:28:42 +02:00
file.c
fs/file.c: replace get_unused_fd() with get_unused_fd_flags(0)
2014-12-10 17:41:10 -08:00
filesystems.c
…
fs_pin.c
make fs/{namespace,super}.c forget about acct.h
2014-08-07 14:40:09 -04:00
fs_struct.c
…
fs-writeback.c
writeback: fix a subtle race condition in I_DIRTY clearing
2014-11-04 10:42:23 -07:00
inode.c
Merge branch 'akpm' (patches from Andrew)
2015-02-10 16:45:56 -08:00
internal.h
take the targets of /proc/*/ns/* symlinks to separate fs
2014-12-10 21:30:20 -05:00
ioctl.c
fsioctl.c: make generic_block_fiemap() signal-tolerant
2015-02-10 14:30:30 -08:00
Kconfig
fs: Make efivarfs a pseudo filesystem, built by default with EFI
2015-01-05 14:15:58 +00:00
Kconfig.binfmt
binfmt_elf: allow arch code to examine PT_LOPROC ... PT_HIPROC headers
2014-11-24 07:45:02 +01:00
libfs.c
move d_rcu from overlapping d_child to overlapping d_alias
2014-11-03 15:20:29 -05:00
locks.c
locks: update comments that refer to inode->i_flock
2015-01-21 20:44:01 -05:00
Makefile
Merge branch 'nsfs' into for-next
2014-12-10 21:31:59 -05:00
mbcache.c
fs/mbcache: replace __builtin_log2() with ilog2()
2014-06-25 22:08:29 -04:00
mount.h
common object embedded into various struct ....ns
2014-12-04 14:31:00 -05:00
mpage.c
vfs: guard end of device for mpage interface
2014-10-09 22:25:53 -04:00
namei.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2014-12-16 15:53:03 -08:00
namespace.c
mnt: Fix a memory stomp in umount
2014-12-18 11:22:02 -08:00
no-block.c
…
nsfs.c
take the targets of /proc/*/ns/* symlinks to separate fs
2014-12-10 21:30:20 -05:00
open.c
Merge branch 'for-3.19' of git://linux-nfs.org/~bfields/linux
2014-12-16 15:25:31 -08:00
pipe.c
new helper: copy_page_from_iter()
2014-05-06 17:39:42 -04:00
pnode.c
mnt: Move the clear of MNT_LOCKED from copy_tree to it's callers.
2014-12-02 10:46:50 -06:00
pnode.h
…
posix_acl.c
posix_acl: handle NULL ACL in posix_acl_equiv_mode
2014-05-06 13:58:42 -04:00
proc_namespace.c
vfs: make mounts and mountstats honor root dir like mountinfo does
2014-12-17 08:27:15 -05:00
read_write.c
locks: convert posix locks to file_lock_context
2015-01-16 16:08:16 -05:00
readdir.c
vfs: make first argument of dir_context.actor typed
2014-10-31 17:48:54 -04:00
select.c
…
seq_file.c
fs, seq_file: fallback to vmalloc instead of oom kill processes
2014-12-13 12:42:49 -08:00
signalfd.c
fs: Convert show_fdinfo functions to void
2014-11-05 14:13:23 -05:00
splice.c
vfs: export do_splice_direct() to modules
2014-10-24 00:14:35 +02:00
stack.c
fs: fix comment for 'CONFIG_LBADF'
2014-08-26 09:35:56 +02:00
stat.c
…
statfs.c
…
super.c
vfs: Remove i_dquot field from inode
2014-11-10 10:06:18 +01:00
sync.c
kill f_dentry uses
2014-11-19 13:01:25 -05:00
timerfd.c
fs: Convert show_fdinfo functions to void
2014-11-05 14:13:23 -05:00
utimes.c
…
xattr.c
new helper: audit_file()
2014-11-19 13:01:26 -05:00