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Andrey Konovalov 7d0325749a userfaultfd: untag user pointers 
This patch is a part of a series that extends kernel ABI to allow to pass
tagged user pointers (with the top byte set to something else other than
0x00) as syscall arguments.

userfaultfd code use provided user pointers for vma lookups, which can
only by done with untagged pointers.

Untag user pointers in validate_range().

Link: http://lkml.kernel.org/r/cdc59ddd7011012ca2e689bc88c3b65b1ea7e413.1563904656.git.andreyknvl@google.com
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Eric Auger <eric.auger@redhat.com>
Cc: Felix Kuehling <Felix.Kuehling@amd.com>
Cc: Jens Wiklander <jens.wiklander@linaro.org>
Cc: Khalid Aziz <khalid.aziz@oracle.com>
Cc: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-25 17:51:41 -07:00
..
9p
9p: Fill min and max timestamps in sb
2019-08-30 07:27:18 -07:00
adfs
Merge branch 'work.adfs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 11:33:22 -07:00
affs
fs: affs: Initialize filesystem timestamp ranges
2019-08-30 07:27:18 -07:00
afs
afs: Support RCU pathwalk
2019-09-02 11:43:54 +01:00
autofs
autofs_lookup(): hold ->d_lock over playing with ->d_flags
2019-07-27 10:03:14 -04:00
befs
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
bfs
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
btrfs
for-5.4-tag
2019-09-18 17:29:31 -07:00
cachefiles
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 36
2019-05-24 17:27:11 +02:00
ceph
fs: ceph: Initialize filesystem timestamp ranges
2019-08-30 07:27:19 -07:00
cifs
RDMA subsystem updates for 5.4
2019-09-21 10:26:24 -07:00
coda
y2038: add inode timestamp clamping
2019-09-19 09:42:37 -07:00
configfs
configfs updates for 5.4:
2019-09-19 13:09:28 -07:00
cramfs
Merge branch 'work.mount2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-09-19 10:06:57 -07:00
crypto
fscrypt: require that key be added when setting a v2 encryption policy
2019-08-12 19:18:50 -07:00
debugfs
Driver Core and debugfs changes for 5.3-rc1
2019-07-12 12:24:03 -07:00
devpts
devpts_pty_kill(): don't bother with d_delete()
2019-09-03 09:30:56 -04:00
dlm
dlm for 5.3
2019-07-12 17:37:53 -07:00
ecryptfs
- Fix error handling when ecryptfs_read_lower() encounters an error
2019-07-14 19:29:04 -07:00
efivarfs
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
efs
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
erofs
erofs: use read_cache_page_gfp for erofs_get_meta_page
2019-09-05 20:10:09 +02:00
exportfs
docs: fs: convert docs without extension to ReST
2019-07-31 13:31:05 -06:00
ext2
\n
2019-09-21 13:53:34 -07:00
ext4
Added new ext4 debugging ioctls to allow userspace to get information
2019-09-21 13:37:39 -07:00
f2fs
f2fs-for-5.4-rc1
2019-09-21 14:26:33 -07:00
fat
fat: delete an unnecessary check before brelse()
2019-09-25 17:51:40 -07:00
freevxfs
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
fscache
Revert "Merge tag 'keys-acl-20190703' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs"
2019-07-10 18:43:43 -07:00
fuse
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
gfs2
Merge branch 'work.mount3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-09-24 12:33:34 -07:00
hfs
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
hfsplus
fs/hfsplus/xattr.c: replace strncpy with memcpy
2019-07-16 19:23:23 -07:00
hostfs
This pull request contains the following changes for UML:
2019-05-12 17:52:13 -04:00
hpfs
fs: hpfs: Initialize filesystem timestamp ranges
2019-08-30 08:11:25 -07:00
hugetlbfs
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
iomap
iomap: fix Invalid License ID
2019-07-25 11:05:11 +02:00
isofs
y2038: add inode timestamp clamping
2019-09-19 09:42:37 -07:00
jbd2
jbd2: remove jbd2_journal_inode_add_[write|wait]
2019-09-24 15:54:07 -07:00
jffs2
This pull request contains the following changes for UBI, UBIFS and JFFS2:
2019-09-21 11:10:16 -07:00
jfs
y2038: add inode timestamp clamping
2019-09-19 09:42:37 -07:00
kernfs
y2038: add inode timestamp clamping
2019-09-19 09:42:37 -07:00
lockd
lockd: Make two symbols static
2019-07-03 17:52:09 -04:00
minix
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
nfs
y2038: add inode timestamp clamping
2019-09-19 09:42:37 -07:00
nfs_common
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
nfsd
Merge branch 'work.mount-base' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-09-18 13:15:58 -07:00
nilfs2
vfs: create a generic checking and prep function for FS_IOC_SETFLAGS
2019-07-01 08:25:34 -07:00
nls
treewide: Add SPDX license identifier - Makefile/Kconfig
2019-05-21 10:50:46 +02:00
notify
selinux/stable-5.4 PR 20190917
2019-09-23 11:21:04 -07:00
ntfs
timestamp_truncate: Replace users of timespec64_trunc
2019-08-30 07:27:17 -07:00
ocfs2
ocfs2: fix spelling mistake "ambigous" -> "ambiguous"
2019-09-24 15:54:07 -07:00
omfs
fs: omfs: Initialize filesystem timestamp ranges
2019-08-30 08:11:25 -07:00
openpromfs
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
orangefs
Orangefs: a fix and a cleanup
2019-09-19 10:21:35 -07:00
overlayfs
ovl: filter of trusted xattr results in audit
2019-09-11 16:11:45 +02:00
proc
mm,thp: stats for file backed THP
2019-09-24 15:54:11 -07:00
pstore
pstore: fs superblock limits
2019-08-30 08:11:25 -07:00
qnx4
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
qnx6
fs: Fill in max and min timestamps in superblock
2019-08-30 07:27:17 -07:00
quota
quota: fix condition for resetting time limit in do_set_dqblk()
2019-07-31 12:04:42 +02:00
ramfs
vfs: Convert ramfs, shmem, tmpfs, devtmpfs, rootfs to use the new mount API
2019-09-12 21:05:34 -04:00
reiserfs
fs/reiserfs/do_balan.c: remove set but not used variable
2019-09-25 17:51:40 -07:00
romfs
Merge branch 'work.mount2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-09-19 10:06:57 -07:00
squashfs
Merge branch 'work.mount2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-09-19 10:06:57 -07:00
sysfs
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
sysv
fs: sysv: Initialize filesystem timestamp ranges
2019-08-30 07:27:18 -07:00
tracefs
\n
2019-07-10 20:09:17 -07:00
ubifs
This pull request contains the following changes for UBI, UBIFS and JFFS2:
2019-09-21 11:10:16 -07:00
udf
fs-udf: Delete an unnecessary check before brelse()
2019-09-04 18:19:43 +02:00
ufs
y2038: add inode timestamp clamping
2019-09-19 09:42:37 -07:00
unicode
unicode: make array 'token' static const, makes object smaller
2019-09-17 11:48:24 -04:00
verity
fs-verity: support builtin file signatures
2019-08-12 19:33:50 -07:00
xfs
y2038: add inode timestamp clamping
2019-09-19 09:42:37 -07:00
aio.c
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
anon_inodes.c
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
attr.c
timestamp_truncate: Replace users of timespec64_trunc
2019-08-30 07:27:17 -07:00
bad_inode.c
…
binfmt_aout.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
binfmt_elf_fdpic.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
binfmt_elf.c
mm, fs: move randomize_stack_top from fs to mm
2019-09-24 15:54:11 -07:00
binfmt_em86.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
binfmt_flat.c
fs/binfmt_flat.c: remove set but not used variable 'inode'
2019-07-16 19:23:22 -07:00
binfmt_misc.c
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
binfmt_script.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
block_dev.c
Changes for 5.4:
2019-09-18 17:35:20 -07:00
buffer.c
for-linus-20190715
2019-07-15 21:20:52 -07:00
char_dev.c
chardev: set variable ret to -EBUSY before checking minor range overlap
2019-05-24 20:50:36 +02:00
compat_binfmt_elf.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 193
2019-05-30 11:29:21 -07:00
compat_ioctl.c
compat_ioctl: pppoe: fix PPPOEIOCSFWD handling
2019-07-30 14:42:13 -07:00
compat.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
coredump.c
coredump: split pipe command whitespace before expanding template
2019-08-03 07:02:01 -07:00
d_path.c
[PATCH] fix d_absolute_path() interplay with fsmount()
2019-08-30 19:31:09 -04:00
dax.c
dax: dax_layout_busy_page() should not unmap cow pages
2019-08-05 14:59:05 -07:00
dcache.c
Merge branch 'work.dcache2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-20 09:15:51 -07:00
dcookies.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
direct-io.c
direct-io: use bio_release_pages in dio_bio_complete
2019-06-29 09:47:31 -06:00
drop_caches.c
…
eventfd.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
eventpoll.c
PM / wakeup: Show wakeup sources stats in sysfs
2019-08-21 00:20:40 +02:00
exec.c
sched/fair: Don't free p->numa_faults with concurrent readers
2019-07-25 15:37:04 +02:00
fcntl.c
fs: mark expected switch fall-throughs
2019-04-08 18:21:02 -05:00
fhandle.c
…
file_table.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
file.c
io_uring-2019-03-06
2019-03-08 14:48:40 -08:00
filesystems.c
vfs: Implement a filesystem superblock creation/configuration context
2019-02-28 03:29:26 -05:00
fs_context.c
vfs: set fs_context::user_ns for reconfigure
2019-09-05 14:33:45 -04:00
fs_parser.c
vfs: Make fs_parse() handle fs_param_is_fd-type params better
2019-09-12 21:06:14 -04:00
fs_pin.c
switch the remnants of releasing the mountpoint away from fs_pin
2019-07-16 22:52:37 -04:00
fs_struct.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
fs_types.c
…
fs-writeback.c
writeback: add tracepoints for cgroup foreign writebacks
2019-08-30 07:42:49 -06:00
fsopen.c
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
inode.c
mm,thp: avoid writes to file with THP in pagecache
2019-09-24 15:54:11 -07:00
internal.h
Merge branch 'work.dcache2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-20 09:15:51 -07:00
io_uring.c
for-5.4/io_uring-2019-09-24
2019-09-24 16:40:21 -07:00
ioctl.c
…
Kconfig
fs-verity for 5.4
2019-09-18 16:59:14 -07:00
Kconfig.binfmt
binfmt_flat: make support for old format binaries optional
2019-06-24 09:16:47 +10:00
libfs.c
Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-07-19 10:42:02 -07:00
locks.c
locks: fix a memory leak bug in __break_lease()
2019-08-20 05:48:52 -04:00
Makefile
fs-verity for 5.4
2019-09-18 16:59:14 -07:00
mbcache.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
mount.h
switch the remnants of releasing the mountpoint away from fs_pin
2019-07-16 22:52:37 -04:00
mpage.c
blkcg, writeback: Rename wbc_account_io() to wbc_account_cgroup_owner()
2019-07-10 09:00:57 -06:00
namei.c
fs/namei.c: keep track of nd->root refcount status
2019-09-03 09:30:45 -04:00
namespace.c
fs/namespace: untag user pointers in copy_mount_options
2019-09-25 17:51:41 -07:00
no-block.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
nsfs.c
vfs: Convert nsfs to use the new mount API
2019-05-25 18:00:06 -04:00
open.c
mm,thp: avoid writes to file with THP in pagecache
2019-09-24 15:54:11 -07:00
pipe.c
vfs: Convert pipe to use the new mount API
2019-05-25 18:00:07 -04:00
pnode.c
fs/namespace: fix unprivileged mount propagation
2019-06-17 17:36:09 -04:00
pnode.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 209
2019-05-30 11:29:53 -07:00
posix_acl.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
proc_namespace.c
…
read_write.c
vfs: fix page locking deadlocks when deduping files
2019-08-16 18:43:24 -07:00
readdir.c
…
select.c
fs/select.c: use struct_size() in kmalloc()
2019-07-16 19:23:25 -07:00
seq_file.c
seq_file: fix problem when seeking mid-record
2019-08-13 16:06:52 -07:00
signalfd.c
fs: mark expected switch fall-throughs
2019-04-08 18:21:02 -05:00
splice.c
uio: make import_iovec()/compat_import_iovec() return bytes on success
2019-05-31 15:30:03 -06:00
stack.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
stat.c
…
statfs.c
vfs: add vfs_get_fsid() helper
2019-02-07 16:38:35 +01:00
super.c
Merge branch 'work.mount2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2019-09-19 10:06:57 -07:00
sync.c
fs/sync.c: sync_file_range(2) may use WB_SYNC_ALL writeback
2019-05-14 09:47:50 -07:00
timerfd.c
timerfd: Prepare for PREEMPT_RT
2019-08-01 20:51:23 +02:00
userfaultfd.c
userfaultfd: untag user pointers
2019-09-25 17:51:41 -07:00
utimes.c
utimes: Clamp the timestamps before update
2019-08-30 07:27:17 -07:00
xattr.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00