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Andrea Arcangeli 656710a60e userfaultfd: non-cooperative: closing the uffd without triggering SIGBUS 
This is an enhancement to avoid a non cooperative userfaultfd manager
having to unregister all regions before it can close the uffd after all
userfaultfd activity completed.

The UFFDIO_UNREGISTER would serialize against the handle_userfault by
taking the mmap_sem for writing, but we can simply repeat the page fault
if we detect the uffd was closed and so the regular page fault paths
should takeover.

Link: http://lkml.kernel.org/r/20170823181227.19926-1-aarcange@redhat.com
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-09-08 18:26:47 -07:00
..
9p
Merge branch 'akpm' (patches from Andrew)
2017-09-06 20:49:49 -07:00
adfs
…
affs
fs: convert a pile of fsync routines to errseq_t based reporting
2017-08-01 08:39:29 -04:00
afs
Merge branch 'akpm' (patches from Andrew)
2017-09-06 20:49:49 -07:00
autofs4
Fix up over-eager 'wait_queue_t' renaming
2017-07-10 11:40:19 -07:00
befs
Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-15 12:00:42 -07:00
bfs
bfs: fix sanity checks for empty files
2017-07-12 16:26:00 -07:00
btrfs
Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block
2017-09-07 11:59:42 -07:00
cachefiles
sched/wait: Disambiguate wq_entry->task_list and wq_head->task_list naming
2017-06-20 12:19:14 +02:00
ceph
Merge branch 'akpm' (patches from Andrew)
2017-09-06 20:49:49 -07:00
cifs
enable xattr support for smb3 and also a bugfix
2017-09-07 16:06:14 -07:00
coda
fs: implement vfs_iter_write using do_iter_write
2017-06-29 17:49:23 -04:00
configfs
configfs: Introduce config_item_get_unless_zero()
2017-06-12 13:20:20 +02:00
cramfs
…
crypto
block: replace bi_bdev with a gendisk pointer and partitions index
2017-08-23 12:49:55 -06:00
debugfs
Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-15 12:00:42 -07:00
devpts
pty: Repair TIOCGPTPEER
2017-08-24 13:23:03 -07:00
dlm
File locking related changes for v4.14
2017-09-06 13:43:26 -07:00
ecryptfs
ecryptfs: convert to file_write_and_wait in ->fsync
2017-08-03 14:20:22 -04:00
efivarfs
VFS: Kill off s_options and helpers
2017-07-11 06:09:21 -04:00
efs
…
exofs
Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block
2017-09-07 11:59:42 -07:00
exportfs
Merge branch 'rebased-statx' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-03-03 11:38:56 -08:00
ext2
dax: use common 4k zero page for dax mmap reads
2017-09-06 17:27:24 -07:00
ext4
Merge branch 'quota_scaling' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2017-09-07 15:19:35 -07:00
f2fs
mm/migrate: new migrate mode MIGRATE_SYNC_NO_COPY
2017-09-08 18:26:46 -07:00
fat
fat: fix using uninitialized fields of fat_inode/fsinfo_inode
2017-03-09 17:01:10 -08:00
freevxfs
…
fscache
mm: remove nr_pages argument from pagevec_lookup{,_range}()
2017-09-06 17:27:27 -07:00
fuse
Writeback error handling fixes for v4.14
2017-09-06 14:11:03 -07:00
gfs2
Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block
2017-09-07 11:59:42 -07:00
hfs
fs: convert a pile of fsync routines to errseq_t based reporting
2017-08-01 08:39:29 -04:00
hfsplus
Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block
2017-09-07 11:59:42 -07:00
hostfs
fs: convert a pile of fsync routines to errseq_t based reporting
2017-08-01 08:39:29 -04:00
hpfs
fs: convert a pile of fsync routines to errseq_t based reporting
2017-08-01 08:39:29 -04:00
hugetlbfs
mm/migrate: new migrate mode MIGRATE_SYNC_NO_COPY
2017-09-08 18:26:46 -07:00
isofs
isofs: Delete an unnecessary variable initialisation in isofs_read_inode()
2017-08-23 18:54:03 +02:00
jbd2
Writeback error handling fixes (pile #2)
2017-07-07 19:38:17 -07:00
jffs2
fs: convert a pile of fsync routines to errseq_t based reporting
2017-08-01 08:39:29 -04:00
jfs
Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block
2017-09-07 11:59:42 -07:00
kernfs
Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block
2017-09-07 11:59:42 -07:00
lockd
sunrpc: mark all struct svc_version instances as const
2017-07-13 15:58:03 -04:00
minix
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-08 10:50:54 -07:00
ncpfs
fs: convert a pile of fsync routines to errseq_t based reporting
2017-08-01 08:39:29 -04:00
nfs
Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block
2017-09-07 11:59:42 -07:00
nfs_common
…
nfsd
annotate RWF_... flags
2017-08-31 17:32:38 -04:00
nilfs2
Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block
2017-09-07 11:59:42 -07:00
nls
…
notify
fsnotify: make dnotify_fsnotify_ops const
2017-08-30 16:02:48 +02:00
ntfs
fs: convert a pile of fsync routines to errseq_t based reporting
2017-08-01 08:39:29 -04:00
ocfs2
Merge branch 'quota_scaling' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2017-09-07 15:19:35 -07:00
omfs
omfs: Implement show_options
2017-07-06 03:31:46 -04:00
openpromfs
…
orangefs
Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-15 12:00:42 -07:00
overlayfs
overlayfs, locking: Remove smp_mb__before_spinlock() usage
2017-08-10 12:29:02 +02:00
proc
mm/device-public-memory: device memory cache coherent with CPU
2017-09-08 18:26:46 -07:00
pstore
Revert "pstore: Honor dmesg_restrict sysctl on dmesg dumps"
2017-08-17 16:29:19 -07:00
qnx4
…
qnx6
…
quota
Merge branch 'quota_scaling' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2017-09-07 15:19:35 -07:00
ramfs
mm: make pagevec_lookup() update index
2017-09-06 17:27:26 -07:00
reiserfs
Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
2017-09-07 14:53:17 -07:00
romfs
romfs: use different way to generate fsid for BLOCK or MTD
2017-01-24 16:26:14 -08:00
squashfs
fs/pstore: fs/squashfs: change usage of LZ4 to work with new LZ4 version
2017-02-24 17:46:57 -08:00
sysfs
sysfs: be careful of error returns from ops->show()
2017-04-08 17:33:32 +02:00
sysv
mm: drop "wait" parameter from write_one_page()
2017-07-05 18:44:22 -04:00
tracefs
VFS: Don't use save/replace_mount_options if not using generic_show_options
2017-07-06 03:31:46 -04:00
ubifs
mm/migrate: new migrate mode MIGRATE_SYNC_NO_COPY
2017-09-08 18:26:46 -07:00
udf
fs-udf: Delete an error message for a failed memory allocation in two functions
2017-08-16 16:43:23 +02:00
ufs
Writeback error handling fixes (pile #1)
2017-07-07 18:39:15 -07:00
xfs
Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block
2017-09-07 11:59:42 -07:00
aio.c
mm/migrate: new migrate mode MIGRATE_SYNC_NO_COPY
2017-09-08 18:26:46 -07:00
anon_inodes.c
…
attr.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>
2017-03-02 08:42:29 +01:00
bad_inode.c
statx: Add a system call to make enhanced file info available
2017-03-02 20:51:15 -05:00
binfmt_aout.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>
2017-03-02 08:42:36 +01:00
binfmt_elf_fdpic.c
binfmt: Introduce secureexec flag
2017-08-01 12:03:05 -07:00
binfmt_elf.c
This series has the ultimate goal of providing a sane stack rlimit when
2017-09-07 20:35:29 -07:00
binfmt_em86.c
…
binfmt_flat.c
exec: Rename bprm->cred_prepared to called_set_creds
2017-08-01 12:02:48 -07:00
binfmt_misc.c
fs: constify tree_descr arrays passed to simple_fill_super()
2017-04-26 23:54:06 -04:00
binfmt_script.c
…
block_dev.c
block: replace bi_bdev with a gendisk pointer and partitions index
2017-08-23 12:49:55 -06:00
buffer.c
Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block
2017-09-07 11:59:42 -07:00
char_dev.c
char_dev: order /proc/devices by major number
2017-07-17 15:28:50 +02:00
compat_binfmt_elf.c
fs/binfmt: Convert obsolete cputime type to nsecs
2017-02-01 09:13:51 +01:00
compat_ioctl.c
media: get rid of removed DMX_GET_CAPS and DMX_SET_SOURCE leftovers
2017-09-05 08:25:07 -04:00
compat.c
fs/compat.c: trim unused includes
2017-04-17 12:52:27 -04:00
coredump.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task_stack.h>
2017-03-02 08:42:36 +01:00
dax.c
dax: initialize variable pfn before using it
2017-09-06 17:27:24 -07:00
dcache.c
Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-15 12:00:42 -07:00
dcookies.c
…
direct-io.c
block: replace bi_bdev with a gendisk pointer and partitions index
2017-08-23 12:49:55 -06:00
drop_caches.c
…
eventfd.c
There has been a fair amount of activity in the docs tree this time
2017-07-03 21:13:25 -07:00
eventpoll.c
epoll: fix race between ep_poll_callback(POLLFREE) and ep_free()/ep_remove()
2017-09-01 13:07:35 -07:00
exec.c
exec: Consolidate pdeath_signal clearing
2017-08-01 12:03:14 -07:00
fcntl.c
vfs: fix flock compat thinko
2017-07-07 13:48:18 -07:00
fhandle.c
fhandle: move compat syscalls from compat.c
2017-04-17 12:52:26 -04:00
file_table.c
fs: new infrastructure for writeback error handling and reporting
2017-07-06 07:02:25 -04:00
file.c
fs/file.c: replace alloc_fdmem() with kvmalloc() alternative
2017-07-06 16:24:30 -07:00
filesystems.c
Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-15 12:00:42 -07:00
fs_pin.c
sched/wait: Disambiguate wq_entry->task_list and wq_head->task_list naming
2017-06-20 12:19:14 +02:00
fs_struct.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/task.h>
2017-03-02 08:42:35 +01:00
fs-writeback.c
writeback: rework wb_[dec|inc]_stat family of functions
2017-07-12 16:26:05 -07:00
inode.c
xfs: evict all inodes involved with log redo item
2017-09-01 10:55:30 -07:00
internal.h
xfs: evict all inodes involved with log redo item
2017-09-01 10:55:30 -07:00
ioctl.c
sched/headers: Prepare for the reduction of <linux/sched.h>'s signal API dependency
2017-03-02 08:42:37 +01:00
iomap.c
Merge branch 'for-4.14/block' of git://git.kernel.dk/linux-block
2017-09-07 11:59:42 -07:00
Kconfig
fs/Kconfig: kill CONFIG_PERCPU_RWSEM some more
2017-07-12 16:26:00 -07:00
Kconfig.binfmt
…
libfs.c
fs: convert __generic_file_fsync to use errseq_t based reporting
2017-07-06 07:02:29 -04:00
locks.c
locks: restore a warn for leaked locks on close
2017-07-21 13:57:31 -04:00
Makefile
…
mbcache.c
ext4: xattr inode deduplication
2017-06-22 11:44:55 -04:00
mount.h
Now that IPC and other changes have landed, enable manual markings for
2017-07-19 08:55:18 -07:00
mpage.c
block: replace bi_bdev with a gendisk pointer and partitions index
2017-08-23 12:49:55 -06:00
namei.c
Now that IPC and other changes have landed, enable manual markings for
2017-07-19 08:55:18 -07:00
namespace.c
Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-15 12:00:42 -07:00
no-block.c
…
nsfs.c
VFS: Provide empty name qstr
2017-07-06 03:27:09 -04:00
open.c
Writeback error handling fixes (pile #2)
2017-07-07 19:38:17 -07:00
pipe.c
VFS: Provide empty name qstr
2017-07-06 03:27:09 -04:00
pnode.c
mnt: Make propagate_umount less slow for overlapping mount propagation trees
2017-05-23 08:41:17 -05:00
pnode.h
mnt: Tuck mounts under others instead of creating shadow/side mounts.
2017-02-04 00:01:06 +13:00
posix_acl.c
sched/headers: Prepare to remove <linux/cred.h> inclusion from <linux/sched.h>
2017-03-02 08:42:31 +01:00
proc_namespace.c
sched/headers: Prepare to move the task_lock()/unlock() APIs to <linux/sched/task.h>
2017-03-02 08:42:38 +01:00
read_write.c
annotate RWF_... flags
2017-08-31 17:32:38 -04:00
readdir.c
readdir: move compat syscalls from compat.c
2017-04-17 12:52:24 -04:00
select.c
fs/select: Fix memory corruption in compat_get_fd_set()
2017-08-28 16:09:19 -07:00
seq_file.c
mm: introduce kv[mz]alloc helpers
2017-05-08 17:15:12 -07:00
signalfd.c
sched/wait: Rename wait_queue_t => wait_queue_entry_t
2017-06-20 12:18:27 +02:00
splice.c
fs: implement vfs_iter_write using do_iter_write
2017-06-29 17:49:23 -04:00
stack.c
…
stat.c
fs: Provide __inode_get_bytes()
2017-08-17 22:06:03 +02:00
statfs.c
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-07-08 10:50:54 -07:00
super.c
quota: Convert dqio_mutex to rwsem
2017-08-17 18:52:48 +02:00
sync.c
Merge branch 'akpm' (patches from Andrew)
2017-09-06 20:49:49 -07:00
timerfd.c
timerfd: Use get_itimerspec64() and put_itimerspec64()
2017-06-30 04:14:38 -04:00
userfaultfd.c
userfaultfd: non-cooperative: closing the uffd without triggering SIGBUS
2017-09-08 18:26:47 -07:00
utimes.c
utimes: move compat syscalls from compat.c
2017-04-17 12:52:23 -04:00
xattr.c
treewide: use kv[mz]alloc* rather than opencoded variants
2017-05-08 17:15:13 -07:00