iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity
linux/fs
History
Mark Fasheh 5de4480ae7 vfs: allow dedupe of user owned read-only files 
The permission check in vfs_dedupe_file_range_one() is too coarse - We only
allow dedupe of the destination file if the user is root, or they have the
file open for write.

This effectively limits a non-root user from deduping their own read-only
files. In addition, the write file descriptor that the user is forced to
hold open can prevent execution of files. As file data during a dedupe
does not change, the behavior is unexpected and this has caused a number of
issue reports. For an example, see:

https://github.com/markfasheh/duperemove/issues/129

So change the check so we allow dedupe on the target if:

- the root or admin is asking for it
- the process has write access
- the owner of the file is asking for the dedupe
- the process could get write access

That way users can open read-only and still get dedupe.

Signed-off-by: Mark Fasheh <mfasheh@suse.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2018-10-17 21:15:39 -04:00
..
9p
Pull request for inclusion in 4.19, take two
2018-08-17 17:27:58 -07:00
adfs
adfs: use timespec64 for time conversion
2018-08-22 10:52:51 -07:00
affs
affs: fix potential memory leak when parsing option 'prefix'
2018-05-28 12:36:41 +02:00
afs
fs/afs: use new return type vm_fault_t
2018-08-23 18:48:43 -07:00
autofs
Merge branch 'akpm' (patches from Andrew)
2018-08-22 12:34:08 -07:00
befs
fix a series of Documentation/ broken file name references
2018-06-15 18:10:01 -03:00
bfs
bfs_add_entry: pass name/len as qstr pointer
2018-05-22 14:27:50 -04:00
btrfs
overlayfs update for 4.19
2018-08-21 18:19:09 -07:00
cachefiles
cachefiles: Wait rather than BUG'ing on "Unexpected object collision"
2018-07-25 14:49:00 +01:00
ceph
The main things are support for cephx v2 authentication protocol and
2018-08-20 18:26:55 -07:00
cifs
cifs: update internal module version number for cifs.ko to 2.12
2018-08-23 15:11:10 -05:00
coda
vfs: change inode times to use struct timespec64
2018-06-05 16:57:31 -07:00
configfs
configfs: fix registered group removal
2018-07-17 06:14:07 -07:00
cramfs
vfs/y2038: inode timestamps conversion to timespec64
2018-06-15 07:31:07 +09:00
crypto
f2fs-for-4.18-rc1
2018-06-11 10:16:13 -07:00
debugfs
Revert "debugfs: inode: debugfs_create_dir uses mode permission from parent"
2018-06-12 20:52:16 -07:00
devpts
devpts: Convert to new IDA API
2018-08-21 23:54:17 -04:00
dlm
treewide: Use array_size() in vmalloc()
2018-06-12 16:19:22 -07:00
ecryptfs
Merge branch 'fixes' of https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs into aio-base
2018-05-26 09:16:25 +02:00
efivarfs
efivars: Call guid_parse() against guid_t type of variable
2018-07-22 14:13:44 +02:00
efs
…
exofs
exofs: use bio_clone_fast in _write_mirror
2018-07-24 14:43:20 -06:00
exportfs
ovl: do not try to reconnect a disconnected origin dentry
2018-04-12 12:04:49 +02:00
ext2
Merge branch 'akpm' (patches from Andrew)
2018-08-17 16:49:31 -07:00
ext4
ext4: don't open-code ERR_CAST
2018-10-10 16:41:40 -04:00
f2fs
f2fs-for-4.19-rc1
2018-08-22 13:29:39 -07:00
fat
fat: propagate 64-bit inode timestamps
2018-08-22 10:52:50 -07:00
freevxfs
freevxfs_lookup(): use d_splice_alias()
2018-05-22 14:27:51 -04:00
fscache
fscache: Fix reference overput in fscache_attach_object() error handling
2018-07-25 14:49:00 +01:00
fuse
fuse update for 4.19
2018-08-21 18:47:36 -07:00
gfs2
gfs2 4.19 merge
2018-08-15 22:40:03 -07:00
hfs
hfs: prevent crash on exit from failed search
2018-08-23 18:48:42 -07:00
hfsplus
hfsplus: prevent crash on exit from failed search
2018-08-23 18:48:42 -07:00
hostfs
vfs: discard ATTR_ATTR_FLAG
2018-08-17 16:20:28 -07:00
hpfs
hpfs: remove unnecessary checks on the value of r when assigning error code
2018-08-25 12:42:33 -07:00
hugetlbfs
mm: zero out the vma in vma_init()
2018-08-22 10:52:44 -07:00
isofs
isofs: fix potential memory leak in mount option parsing
2018-04-16 09:47:41 +02:00
jbd2
jbd2: replace current_kernel_time64 with ktime equivalent
2018-07-29 15:51:47 -04:00
jffs2
jffs2: use unsigned 32-bit timstamps consistently
2018-07-18 16:44:01 +02:00
jfs
Just one jfs patch for 4.19
2018-08-15 22:47:23 -07:00
kernfs
Driver core patches for 4.19-rc1
2018-08-18 11:44:53 -07:00
lockd
nfsd: fix leaked file lock with nfs exported overlayfs
2018-08-09 16:11:21 -04:00
minix
minix_lookup: use d_splice_alias()
2018-05-22 14:27:52 -04:00
nfs
NFS client updates for Linux 4.19
2018-08-23 16:03:58 -07:00
nfs_common
net: Drop pernet_operations::async
2018-03-27 13:18:09 -04:00
nfsd
A mistake on my part caused me to tag my branch 6 commits too early,
2018-08-23 16:00:10 -07:00
nilfs2
fs/nilfs2/file.c: use new return type vm_fault_t
2018-08-22 10:52:49 -07:00
nls
…
notify
Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2018-08-21 13:47:29 -07:00
ntfs
ntfs: don't open-code ERR_CAST
2018-10-12 22:46:50 -04:00
ocfs2
overlayfs update for 4.19
2018-08-21 18:19:09 -07:00
omfs
omfs_lookup(): report IO errors, use d_splice_alias()
2018-05-22 14:27:58 -04:00
openpromfs
openpromfs: switch to d_splice_alias()
2018-05-22 14:27:57 -04:00
orangefs
orangefs: remove redundant pointer orangefs_inode
2018-08-14 12:07:14 -04:00
overlayfs
ovl: set I_CREATING on inode being created
2018-08-22 13:15:25 -07:00
proc
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-08-26 11:25:21 -07:00
pstore
pstore: add zstd compression support
2018-08-03 18:12:18 -07:00
qnx4
qnx4_lookup: use d_splice_alias()
2018-05-22 14:27:52 -04:00
qnx6
qnx6_lookup: switch to d_splice_alias()
2018-05-22 14:27:54 -04:00
quota
quota: Cleanup list iteration in dqcache_shrink_scan()
2018-06-20 11:04:26 +02:00
ramfs
…
reiserfs
reiserfs: fix broken xattr handling (heap corruption, bad retval)
2018-08-22 10:52:50 -07:00
romfs
romfs_lookup: switch to d_splice_alias()
2018-05-22 14:27:55 -04:00
squashfs
Squashfs: Compute expected length from inode size rather than block length
2018-08-02 09:34:02 -07:00
sysfs
Driver core patches for 4.19-rc1
2018-08-18 11:44:53 -07:00
sysv
fs/sysv/inode.c: use ktime_get_real_seconds() for superblock stamp
2018-08-22 10:52:51 -07:00
tracefs
tracefs: Annotate tracefs_ops with __ro_after_init
2018-07-31 11:32:44 -04:00
ubifs
ubifs: Remove empty file.h
2018-08-24 13:50:07 +02:00
udf
\n
2018-08-17 09:38:39 -07:00
ufs
fs/ufs: use ktime_get_real_seconds for sb and cg timestamps
2018-08-17 16:20:27 -07:00
xfs
overlayfs update for 4.19
2018-08-21 18:19:09 -07:00
aio.c
Merge branch 'work.aio' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-08-13 20:56:23 -07:00
anon_inodes.c
anon_inode_getfile(): switch to alloc_file_pseudo()
2018-07-12 10:04:27 -04:00
attr.c
fs: Fix attr.c kernel-doc
2018-07-03 16:44:45 -04:00
bad_inode.c
get rid of 'opened' argument of ->atomic_open() - part 3
2018-07-12 10:04:20 -04:00
binfmt_aout.c
exec: introduce finalize_exec() before start_thread()
2018-04-11 10:28:37 -07:00
binfmt_elf_fdpic.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
binfmt_elf.c
Here are the main MIPS changes for 4.19.
2018-08-13 19:24:32 -07:00
binfmt_em86.c
…
binfmt_flat.c
exec: introduce finalize_exec() before start_thread()
2018-04-11 10:28:37 -07:00
binfmt_misc.c
turn filp_clone_open() into inline wrapper for dentry_open()
2018-07-10 23:29:03 -04:00
binfmt_script.c
…
block_dev.c
for-4.19/block-20180812
2018-08-14 10:23:25 -07:00
buffer.c
fs, mm: account buffer_head to kmemcg
2018-08-17 16:20:30 -07:00
char_dev.c
block, char_dev: Use correct format specifier for unsigned ints
2018-03-15 17:59:24 +01:00
compat_binfmt_elf.c
…
compat_ioctl.c
media: dvb/audio.h: get rid of unused APIs
2018-07-30 16:21:49 -04:00
compat.c
ncpfs: remove compat functionality
2018-06-05 19:23:26 +02:00
coredump.c
…
d_path.c
split d_path() and friends into a separate file
2018-03-29 15:07:46 -04:00
dax.c
libnvdimm-for-4.19_dax-memory-failure
2018-08-25 18:43:59 -07:00
dcache.c
fs/dcache.c: fix kmemcheck splat at take_dentry_name_snapshot()
2018-08-17 16:20:28 -07:00
dcookies.c
fs: add do_lookup_dcookie() helper; remove in-kernel call to syscall
2018-04-02 20:15:39 +02:00
direct-io.c
block: consistently use GFP_NOIO instead of __GFP_NORECLAIM
2018-05-14 08:55:18 -06:00
drop_caches.c
…
eventfd.c
Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL
2018-06-28 10:40:47 -07:00
eventpoll.c
fs/eventpoll.c: simplify ep_is_linked() callers
2018-08-22 10:52:49 -07:00
exec.c
Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2018-08-21 13:47:29 -07:00
fcntl.c
signal: Don't send signals to tasks that don't exist
2018-08-15 23:03:20 -05:00
fhandle.c
…
file_table.c
overlayfs update for 4.19
2018-08-21 18:19:09 -07:00
file.c
fs: add ksys_close() wrapper; remove in-kernel calls to sys_close()
2018-04-02 20:16:00 +02:00
filesystems.c
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
fs_pin.c
…
fs_struct.c
…
fs-writeback.c
bdi: Fix oops in wb_workfn()
2018-05-03 16:11:37 -06:00
inode.c
overlayfs update for 4.19
2018-08-21 18:19:09 -07:00
internal.h
overlayfs update for 4.19
2018-08-21 18:19:09 -07:00
ioctl.c
vfs: export vfs_ioctl() to modules
2018-07-18 15:44:40 +02:00
iomap.c
Changes since last update:
2018-08-21 18:15:47 -07:00
Kconfig
autofs: remove left-over autofs4 stubs
2018-06-11 08:22:34 -07:00
Kconfig.binfmt
kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt
2018-08-02 08:06:55 +09:00
libfs.c
fs, dax: prepare for dax-specific address_space_operations
2018-03-30 11:34:55 -07:00
locks.c
overlayfs update for 4.19
2018-08-21 18:19:09 -07:00
Makefile
autofs: remove left-over autofs4 stubs
2018-06-11 08:22:34 -07:00
mbcache.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
mount.h
…
mpage.c
mpage: mpage_readpages() should submit IO as read-ahead
2018-08-17 16:20:29 -07:00
namei.c
namei: allow restricted O_CREAT of FIFOs and regular files
2018-08-23 18:48:43 -07:00
namespace.c
Merge branch 'ida-4.19' of git://git.infradead.org/users/willy/linux-dax
2018-08-26 11:48:42 -07:00
no-block.c
…
nsfs.c
net: Export open_related_ns()
2018-02-15 15:34:42 -05:00
open.c
overlayfs update for 4.19
2018-08-21 18:19:09 -07:00
pipe.c
Merge branch 'work.open3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-08-13 19:58:36 -07:00
pnode.c
…
pnode.h
…
posix_acl.c
…
proc_namespace.c
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
read_write.c
vfs: allow dedupe of user owned read-only files
2018-10-17 21:15:39 -04:00
readdir.c
fs: add ksys_getdents64() helper; remove in-kernel calls to sys_getdents64()
2018-04-02 20:16:02 +02:00
select.c
Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL
2018-06-28 10:40:47 -07:00
seq_file.c
fs/seq_file.c: simplify seq_file iteration code and interface
2018-08-17 16:20:28 -07:00
signalfd.c
Merge branch 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-06-16 16:21:50 +09:00
splice.c
Merge branch 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-06-16 16:21:50 +09:00
stack.c
…
stat.c
fs: add do_readlinkat() helper; remove internal call to sys_readlinkat()
2018-04-02 20:15:34 +02:00
statfs.c
kernel: add kcompat_sys_{f,}statfs64()
2018-07-12 14:49:48 +01:00
super.c
Merge branch 'ida-4.19' of git://git.infradead.org/users/willy/linux-dax
2018-08-26 11:48:42 -07:00
sync.c
Changes for this release:
2018-04-04 12:44:02 -07:00
timerfd.c
Merge branch 'work.aio' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-08-13 20:56:23 -07:00
userfaultfd.c
mm: Change return type int to vm_fault_t for fault handlers
2018-08-23 18:48:44 -07:00
utimes.c
fs: add do_compat_futimesat() helper; remove in-kernel call to compat syscall
2018-04-02 20:15:44 +02:00
xattr.c
Merge branch 'userns-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2018-08-24 09:25:39 -07:00