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Qiuyang Sun 5a3a2d83cd f2fs: dax: fix races between page faults and truncating pages 
Currently in F2FS, page faults and operations that truncate the pagecahe
or data blocks, are completely unsynchronized. This can result in page
fault faulting in a page into a range that we are changing after
truncating, and thus we can end up with a page mapped to disk blocks that
will be shortly freed. Filesystem corruption will shortly follow.

This patch fixes the problem by creating new rw semaphore i_mmap_sem in
f2fs_inode_info and grab it for functions removing blocks from extent tree
and for read over page faults. The mechanism is similar to that in ext4.

Signed-off-by: Qiuyang Sun <sunqiuyang@huawei.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2017-07-04 02:11:35 -07:00
..
9p
9p: Convert to separately allocated bdi
2017-04-20 12:09:55 -06:00
adfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
affs
sched/headers: Prepare to remove <linux/cred.h> inclusion from <linux/sched.h>
2017-03-02 08:42:31 +01:00
afs
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2017-05-02 16:40:27 -07:00
autofs4
Fix dead URLs to ftp.kernel.org
2017-03-28 16:16:52 +02:00
befs
befs: make export work with cold dcache
2017-05-05 11:35:35 +01:00
bfs
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
btrfs
Merge branch 'for-4.12/block' of git://git.kernel.dk/linux-block
2017-05-01 10:39:57 -07:00
cachefiles
sched/headers: Prepare to remove <linux/cred.h> inclusion from <linux/sched.h>
2017-03-02 08:42:31 +01:00
ceph
Merge branch 'for-4.12/block' of git://git.kernel.dk/linux-block
2017-05-01 10:39:57 -07:00
cifs
Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6
2017-05-06 11:51:46 -07:00
coda
coda: Convert to separately allocated bdi
2017-04-20 12:09:55 -06:00
configfs
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
cramfs
…
crypto
fscrypt: introduce helper function for filename matching
2017-05-04 11:44:37 -04:00
debugfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2017-02-23 20:33:51 -08:00
devpts
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
dlm
net: Work around lockdep limitation in sockets that use sockets
2017-03-09 18:23:27 -08:00
ecryptfs
ecryptfs: Convert to separately allocated bdi
2017-04-20 12:09:55 -06:00
efivarfs
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-10-10 20:16:43 -07:00
efs
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
exofs
exofs: Convert to separately allocated bdi
2017-04-20 12:09:55 -06:00
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
libnvdimm for 4.12
2017-05-05 18:49:20 -07:00
ext4
Only bug fixes and cleanups for this merge window.
2017-05-08 11:40:34 -07:00
f2fs
f2fs: dax: fix races between page faults and truncating pages
2017-07-04 02:11:35 -07:00
fat
fat: fix using uninitialized fields of fat_inode/fsinfo_inode
2017-03-09 17:01:10 -08:00
freevxfs
…
fscache
KEYS: Differentiate uses of rcu_dereference_key() and user_key_payload()
2017-03-02 10:09:00 +11:00
fuse
fuse: Get rid of bdi_initialized
2017-04-20 12:09:55 -06:00
gfs2
We've got ten GFS2 patches for this merge window.
2017-05-05 13:40:20 -07:00
hfs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-03-03 21:44:35 -08:00
hfsplus
sched/headers: Prepare to remove <linux/cred.h> inclusion from <linux/sched.h>
2017-03-02 08:42:31 +01:00
hostfs
vfs: remove ".readlink = generic_readlink" assignments
2016-12-09 16:45:04 +01:00
hpfs
sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>
2017-03-02 08:42:32 +01:00
hugetlbfs
hugetlbfs: fix offset overflow in hugetlbfs mmap
2017-04-13 18:24:21 -07:00
isofs
sched/headers: Prepare to remove <linux/cred.h> inclusion from <linux/sched.h>
2017-03-02 08:42:31 +01:00
jbd2
Add GETFSMAP support; some performance improvements for very large
2017-05-08 11:30:05 -07:00
jffs2
sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>
2017-03-02 08:42:32 +01:00
jfs
jfs: Remove jfs_get_inode_flags()
2017-04-19 14:21:23 +02:00
kernfs
kernfs: Check KERNFS_HAS_RELEASE before calling kernfs_release_file()
2017-03-17 10:25:59 +09:00
lockd
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>
2017-03-02 08:42:29 +01:00
minix
statx: Add a system call to make enhanced file info available
2017-03-02 20:51:15 -05:00
ncpfs
ncpfs: Convert to separately allocated bdi
2017-04-20 12:09:55 -06:00
nfs
nfs: Fix bdi handling for cloned superblocks
2017-05-04 07:57:46 -06:00
nfs_common
netns: make struct pernet_operations::id unsigned int
2016-11-18 10:59:15 -05:00
nfsd
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-05-01 19:12:53 -07:00
nilfs2
fs: Remove SB_I_DYNBDI flag
2017-04-20 12:09:55 -06:00
nls
…
notify
fanotify: don't expose EOPENSTALE to userspace
2017-04-25 15:48:06 +02:00
ntfs
sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>
2017-03-02 08:42:32 +01:00
ocfs2
fs/ocfs2/cluster: use offset_in_page() macro
2017-05-03 15:52:07 -07:00
omfs
sched/headers: Prepare to remove <linux/cred.h> inclusion from <linux/sched.h>
2017-03-02 08:42:31 +01:00
openpromfs
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
orangefs
Some cleanups:
2017-05-05 13:36:10 -07:00
overlayfs
overlayfs: remove now unnecessary header file include
2017-03-08 10:42:13 -08:00
proc
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2017-05-05 11:08:43 -07:00
pstore
pstore: Solve lockdep warning by moving inode locks
2017-04-27 20:35:34 -07:00
qnx4
…
qnx6
…
quota
quota: Remove dquot_quotactl_ops
2017-04-19 14:21:23 +02:00
ramfs
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
reiserfs
reiserfs: Remove i_attrs_to_sd_attrs()
2017-04-19 14:21:23 +02:00
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
statx: Add a system call to make enhanced file info available
2017-03-02 20:51:15 -05:00
tracefs
…
ubifs
Only bug fixes and cleanups for this merge window.
2017-05-08 11:40:34 -07:00
udf
udf: use kmap_atomic for memcpy copying
2017-04-24 16:28:02 +02:00
ufs
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
xfs
Changes for 4.12:
2017-05-06 11:46:16 -07:00
aio.c
Merge branch 'WIP.sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-03-03 10:16:38 -08:00
anon_inodes.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
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
sched/headers: Prepare to move cputime functionality from <linux/sched.h> into <linux/sched/cputime.h>
2017-03-02 08:42:39 +01:00
binfmt_elf.c
sched/headers: Prepare to move cputime functionality from <linux/sched.h> into <linux/sched/cputime.h>
2017-03-02 08:42:39 +01:00
binfmt_em86.c
…
binfmt_flat.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_misc.c
sched/headers: Prepare to remove the <linux/mm_types.h> dependency from <linux/sched.h>
2017-03-02 08:42:37 +01:00
binfmt_script.c
…
block_dev.c
libnvdimm for 4.12
2017-05-05 18:49:20 -07:00
buffer.c
sched/headers: Prepare for the reduction of <linux/sched.h>'s signal API dependency
2017-03-02 08:42:37 +01:00
char_dev.c
chardev: add helper function to register char devs with a struct device
2017-03-21 06:44:32 +01:00
compat_binfmt_elf.c
fs/binfmt: Convert obsolete cputime type to nsecs
2017-02-01 09:13:51 +01:00
compat_ioctl.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
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
libnvdimm for 4.12
2017-05-05 18:49:20 -07:00
dcache.c
mnt: Protect the mountpoint hashtable with mount_lock
2017-01-10 13:34:43 +13:00
dcookies.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
direct-io.c
fs: add i_blocksize()
2017-02-27 18:43:46 -08:00
drop_caches.c
…
eventfd.c
sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>
2017-03-02 08:42:32 +01:00
eventpoll.c
epoll: Add busy poll support to epoll with socket fds.
2017-03-24 20:49:31 -07:00
exec.c
x86/arch_prctl: Add ARCH_[GET|SET]_CPUID
2017-03-20 16:10:34 +01:00
fcntl.c
fcntl: move compat syscalls from compat.c
2017-04-17 12:52:24 -04:00
fhandle.c
fhandle: move compat syscalls from compat.c
2017-04-17 12:52:26 -04:00
file_table.c
sched/headers: Prepare to remove <linux/cred.h> inclusion from <linux/sched.h>
2017-03-02 08:42:31 +01:00
file.c
sched/headers: Prepare for new header dependencies before moving code to <linux/sched/signal.h>
2017-03-02 08:42:29 +01:00
filesystems.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
fs_pin.c
…
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: fix memory leak in wb_queue_work()
2017-03-13 08:27:34 -06:00
inode.c
fsnotify: Free fsnotify_mark_connector when there is no mark attached
2017-04-10 17:37:35 +02:00
internal.h
fhandle: move compat syscalls from compat.c
2017-04-17 12:52:26 -04:00
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
Changes for 4.12:
2017-05-06 11:46:16 -07:00
Kconfig
dax: fix build warnings with FS_DAX and !FS_IOMAP
2017-01-24 16:26:14 -08:00
Kconfig.binfmt
docs: fix locations of several documents that got moved
2016-10-24 08:12:35 -02:00
libfs.c
Merge branch 'rebased-statx' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-03-03 11:38:56 -08:00
locks.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
Makefile
logfs: remove from tree
2016-12-14 23:48:11 -05:00
mbcache.c
mbcache: document that "find" functions only return reusable entries
2016-12-03 15:55:01 -05:00
mount.h
fsnotify: Free fsnotify_mark_connector when there is no mark attached
2017-04-10 17:37:35 +02:00
mpage.c
fs: add i_blocksize()
2017-02-27 18:43:46 -08:00
namei.c
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2017-05-03 08:50:52 -07:00
namespace.c
fsnotify: Free fsnotify_mark_connector when there is no mark attached
2017-04-10 17:37:35 +02:00
no-block.c
…
nsfs.c
nsfs: mark dentry with DCACHE_RCUACCESS
2017-04-19 15:56:24 -07:00
open.c
open: move compat syscalls from compat.c
2017-04-17 12:52:25 -04:00
pipe.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
pnode.c
mnt: Tuck mounts under others instead of creating shadow/side mounts.
2017-02-04 00:01:06 +13:00
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
move compat_rw_copy_check_uvector() over to fs/read_write.c
2017-04-17 12:52:26 -04:00
readdir.c
readdir: move compat syscalls from compat.c
2017-04-17 12:52:24 -04:00
select.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2017-05-02 16:40:27 -07:00
seq_file.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00
signalfd.c
…
splice.c
Merge branch 'work.splice' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-05-02 11:38:06 -07:00
stack.c
…
stat.c
Merge branch 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2017-05-02 11:54:26 -07:00
statfs.c
statfs: move compat syscalls from compat.c
2017-04-17 12:52:23 -04:00
super.c
bdi: Drop 'parent' argument from bdi_register[_va]()
2017-04-20 12:09:55 -06:00
sync.c
vfs: use helper for calling f_op->fsync()
2017-02-20 16:51:23 +01:00
timerfd.c
timerfd: Only check CAP_WAKE_ALARM when it is needed
2017-03-01 12:53:44 +01:00
userfaultfd.c
userfaultfd: report actual registered features in fdinfo
2017-04-08 00:47:48 -07:00
utimes.c
utimes: move compat syscalls from compat.c
2017-04-17 12:52:23 -04:00
xattr.c
Replace <asm/uaccess.h> with <linux/uaccess.h> globally
2016-12-24 11:46:01 -08:00