Andrea Arcangeli 2c5b7e1be7 userfaultfd: avoid missing wakeups during refile in userfaultfd_read ...

During the refile in userfaultfd_read both waitqueues could look empty to
the lockless wake_userfault().  Use a seqcount to prevent this false
negative that could leave an userfault blocked.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2015-09-04 16:54:41 -07:00

..

9p

9p: don't leave a half-initialized inode sitting around

2015-07-12 11:22:05 -04:00

adfs

fs/adfs: remove unneeded cast

2015-06-30 19:44:57 -07:00

affs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-07-04 19:36:06 -07:00

afs

…

autofs4

make simple_positive() public

2015-06-23 18:02:01 -04:00

befs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-07-04 19:36:06 -07:00

bfs

…

btrfs

Merge branch 'for-4.3/core' of git://git.kernel.dk/linux-block

2015-09-02 13:10:25 -07:00

cachefiles

Merge branch 'fscache-fixes' into for-next

2015-06-23 18:01:30 -04:00

ceph

fs: create and use seq_show_option for escaping

2015-09-04 16:54:41 -07:00

cifs

fs: create and use seq_show_option for escaping

2015-09-04 16:54:41 -07:00

coda

fs: cleanup slight list_entry abuse

2015-06-23 18:01:59 -04:00

configfs

configfs: fix kernel infoleak through user-controlled format string

2015-07-17 16:39:53 -07:00

cramfs

…

debugfs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-07-04 19:36:06 -07:00

devpts

devpts: if initialization failed, don't crash when opening /dev/ptmx

2015-06-30 19:44:58 -07:00

dlm

Merge tag 'dlm-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm

2015-09-03 12:57:48 -07:00

ecryptfs

treewide: Fix typo in printk

2015-08-07 13:58:05 +02:00

efivarfs

…

efs

fs/efs: femove unneeded cast

2015-06-25 17:00:42 -07:00

exofs

pagemap.h: move dir_pages() over there

2015-06-23 18:02:00 -04:00

exportfs

…

ext2

ext2: Handle error from dquot_initalize()

2015-07-23 20:59:37 +02:00

ext4

fs: create and use seq_show_option for escaping

2015-09-04 16:54:41 -07:00

f2fs

Merge tag 'for-f2fs-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs

2015-09-03 13:10:22 -07:00

fat

…

freevxfs

freevxfs: Grammar s/an negative/a negative/

2015-08-07 13:59:24 +02:00

fscache

…

fuse

fs/fuse: fix ioctl type confusion

2015-08-16 12:35:44 -07:00

gfs2

fs: create and use seq_show_option for escaping

2015-09-04 16:54:41 -07:00

hfs

fs: create and use seq_show_option for escaping

2015-09-04 16:54:41 -07:00

hfsplus

fs: create and use seq_show_option for escaping

2015-09-04 16:54:41 -07:00

hostfs

fs: create and use seq_show_option for escaping

2015-09-04 16:54:41 -07:00

hpfs

hpfs: update ctime and mtime on directory modification

2015-09-03 11:55:30 -07:00

hugetlbfs

ipc: use private shmem or hugetlbfs inodes for shm segments.

2015-08-07 04:39:41 +03:00

isofs

…

jbd2

jbd2: limit number of reserved credits

2015-08-04 11:21:52 -04:00

jffs2

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-07-04 19:36:06 -07:00

jfs

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

2015-09-03 12:28:30 -07:00

kernfs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2015-07-03 15:20:57 -07:00

lockd

…

logfs

block: remove bio_get_nr_vecs()

2015-08-13 12:32:04 -06:00

minix

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-07-04 19:36:06 -07:00

ncpfs

…

nfs

Merge branch 'for-4.3/core' of git://git.kernel.dk/linux-block

2015-09-02 13:10:25 -07:00

nfs_common

…

nfsd

nfsd: do nfs4_check_fh in nfs4_check_file instead of nfs4_check_olstateid

2015-07-31 16:30:26 -04:00

nilfs2

block: remove bio_get_nr_vecs()

2015-08-13 12:32:04 -06:00

nls

…

notify

fsnotify: get rid of fsnotify_destroy_mark_locked()

2015-09-04 16:54:41 -07:00

ntfs

ntfs: delete unnecessary checks before calling iput()

2015-09-04 16:54:41 -07:00

ocfs2

fs: create and use seq_show_option for escaping

2015-09-04 16:54:41 -07:00

omfs

…

openpromfs

…

overlayfs

fs: create and use seq_show_option for escaping

2015-09-04 16:54:41 -07:00

proc

userfaultfd: add VM_UFFD_MISSING and VM_UFFD_WP

2015-09-04 16:54:41 -07:00

pstore

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2015-07-03 15:20:57 -07:00

qnx4

…

qnx6

pagemap.h: move dir_pages() over there

2015-06-23 18:02:00 -04:00

quota

quota: remove an unneeded condition

2015-08-11 10:01:24 +02:00

ramfs

…

reiserfs

fs: create and use seq_show_option for escaping

2015-09-04 16:54:41 -07:00

romfs

…

squashfs

fs: cleanup slight list_entry abuse

2015-06-23 18:01:59 -04:00

sysfs

vfs: Commit to never having exectuables on proc and sysfs.

2015-07-10 10:39:25 -05:00

sysv

pagemap.h: move dir_pages() over there

2015-06-23 18:02:00 -04:00

tracefs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-07-04 19:36:06 -07:00

ubifs

Merge tag 'upstream-4.2-rc1' of git://git.infradead.org/linux-ubifs

2015-06-25 14:11:34 -07:00

udf

udf: Don't modify filesystem for read-only mounts

2015-08-20 14:58:35 +02:00

ufs

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2015-07-04 19:36:06 -07:00

xfs

fs: create and use seq_show_option for escaping

2015-09-04 16:54:41 -07:00

aio.c

…

anon_inodes.c

…

attr.c

…

bad_inode.c

…

binfmt_aout.c

…

binfmt_elf_fdpic.c

…

binfmt_elf.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

binfmt_em86.c

…

binfmt_flat.c

…

binfmt_misc.c

…

binfmt_script.c

…

block_dev.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

buffer.c

fs: use helper bio_add_page() instead of open coding on bi_io_vec

2015-08-13 12:32:00 -06:00

char_dev.c

fs/char_dev.c: fix incorrect documentation for unregister_chrdev_region

2015-08-05 13:49:35 -07:00

compat_binfmt_elf.c

…

compat_ioctl.c

ioctl_compat: handle FITRIM

2015-07-09 11:42:21 -07:00

compat.c

…

coredump.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

dax.c

xfs: call dax_fault on read page faults for DAX

2015-07-29 11:48:00 +10:00

dcache.c

fs, file table: reinit files_stat.max_files after deferred memory initialisation

2015-08-07 04:39:40 +03:00

dcookies.c

…

direct-io.c

block: remove bio_get_nr_vecs()

2015-08-13 12:32:04 -06:00

drop_caches.c

…

eventfd.c

…

eventpoll.c

…

exec.c

vfs: Commit to never having exectuables on proc and sysfs.

2015-07-10 10:39:25 -05:00

fcntl.c

…

fhandle.c

…

file_table.c

fs, file table: reinit files_stat.max_files after deferred memory initialisation

2015-08-07 04:39:40 +03:00

file.c

fs/file.c: __fget() and dup2() atomicity rules

2015-07-01 02:31:08 -04:00

filesystems.c

…

fs_pin.c

…

fs_struct.c

…

fs-writeback.c

writeback: sync_inodes_sb() must write out I_DIRTY_TIME inodes and always call wait_sb_inodes()

2015-08-25 14:35:09 -06:00

inode.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

internal.h

…

ioctl.c

…

Kconfig

fs: Remove ext3 filesystem driver

2015-07-23 20:59:40 +02:00

Kconfig.binfmt

…

libfs.c

fs: Set the size of empty dirs to 0.

2015-08-12 15:28:45 -05:00

locks.c

locks: inline posix_lock_file_wait and flock_lock_file_wait

2015-07-13 06:29:11 -04:00

Makefile

userfaultfd: buildsystem activation

2015-09-04 16:54:41 -07:00

mbcache.c

…

mount.h

fs: use seq_open_private() for proc_mounts

2015-06-30 19:44:56 -07:00

mpage.c

block: remove bio_get_nr_vecs()

2015-08-13 12:32:04 -06:00

namei.c

may_follow_link() should use nd->inode

2015-08-04 23:23:50 -04:00

namespace.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2015-09-01 16:13:25 -07:00

no-block.c

…

nsfs.c

nsfs: Add a show_path method to fix mountinfo

2015-07-11 11:09:00 -05:00

open.c

vfs: Commit to never having exectuables on proc and sysfs.

2015-07-10 10:39:25 -05:00

pipe.c

…

pnode.c

mnt: Don't propagate unmounts to locked mounts

2015-04-02 20:34:20 -05:00

pnode.h

mnt: Clarify and correct the disconnect logic in umount_tree

2015-07-22 20:33:27 -05:00

posix_acl.c

fs/posix_acl.c: make posix_acl_create() safer and cleaner

2015-06-23 18:01:07 -04:00

proc_namespace.c

fs: use seq_open_private() for proc_mounts

2015-06-30 19:44:56 -07:00

read_write.c

…

readdir.c

…

select.c

…

seq_file.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

signalfd.c

signalfd: fix information leak in signalfd_copyinfo

2015-08-07 04:39:40 +03:00

splice.c

Merge branch 'akpm' (patches from Andrew)

2015-06-24 20:47:21 -07:00

stack.c

…

stat.c

…

statfs.c

…

super.c

fs:super:get_anon_bdev: fix race condition could cause dev exceed its upper limitation

2015-07-01 01:50:06 -04:00

sync.c

…

timerfd.c

…

userfaultfd.c

userfaultfd: avoid missing wakeups during refile in userfaultfd_read

2015-09-04 16:54:41 -07:00

utimes.c

…

xattr.c

…