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Jens Axboe 13fb0e1ecf proc: don't allow async path resolution of /proc/thread-self components 
commit 0d4370cfe36b7f1719123b621a4ec4d9c7a25f89 upstream.

If this is attempted by an io-wq kthread, then return -EOPNOTSUPP as we
don't currently support that. Once we can get task_pid_ptr() doing the
right thing, then this can go away again.

Use PF_IO_WORKER for this to speciically target the io_uring workers.
Modify the /proc/self/ check to use PF_IO_WORKER as well.

Cc: stable@vger.kernel.org
Fixes: 8d4c3e76e3be ("proc: don't allow async path resolution of /proc/self components")
Reported-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-03-04 11:38:42 +01:00
..
9p
fs: 9p: add generic splice_write file operation
2020-12-01 21:40:47 +01:00
adfs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
affs
fs/affs: release old buffer head on error path
2021-03-04 11:38:37 +01:00
afs
rxrpc: Fix deadlock around release of dst cached on udp tunnel
2021-02-10 09:29:13 +01:00
autofs
autofs: harden ioctl table
2020-10-16 11:11:22 -07:00
befs
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
bfs
bfs: don't use WARNING: string when it's just info.
2021-01-06 14:56:52 +01:00
btrfs
btrfs: fix extent buffer leak on failure to copy root
2021-03-04 11:38:30 +01:00
cachefiles
cachefiles: Drop superfluous readpages aops NULL check
2021-01-27 11:55:22 +01:00
ceph
ceph: fix flush_snap logic after putting caps
2021-03-04 11:38:08 +01:00
cifs
cifs: Set CIFS_MOUNT_USE_PREFIX_PATH flag on setting cifs_sb->prepath.
2021-02-26 10:13:01 +01:00
coda
…
configfs
fs: configfs: delete repeated words in comments
2020-10-16 11:11:19 -07:00
cramfs
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
crypto
fscrypt: add fscrypt_is_nokey_name()
2020-12-26 16:02:43 +01:00
debugfs
debugfs: do not attempt to create a new file before the filesystem is initalized
2021-03-04 11:37:17 +01:00
devpts
…
dlm
networking changes for the 5.10 merge window
2020-10-15 18:42:13 -07:00
ecryptfs
mm, treewide: rename kzfree() to kfree_sensitive()
2020-08-07 11:33:22 -07:00
efivarfs
efivarfs: revert "fix memory leak in efivarfs_create()"
2020-11-25 16:55:02 +01:00
efs
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
erofs
erofs: initialized fields can only be observed after bit is set
2021-03-04 11:38:28 +01:00
exfat
exfat: fix shift-out-of-bounds in exfat_fill_super()
2021-03-04 11:38:41 +01:00
exportfs
…
ext2
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
ext4
ext: EXT4_KUNIT_TESTS should depend on EXT4_FS instead of selecting it
2021-03-04 11:38:15 +01:00
f2fs
f2fs: fix a wrong condition in __submit_bio
2021-03-04 11:37:46 +01:00
fat
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
freevxfs
…
fscache
…
fuse
fuse: fix bad inode
2021-01-09 13:46:24 +01:00
gfs2
gfs2: Fix deadlock between gfs2_{create_inode,inode_lookup} and delete_work_func
2020-12-01 00:21:10 +01:00
hfs
fs: Replace zero-length array with flexible-array member
2020-10-29 17:22:59 -05:00
hfsplus
fs: Replace zero-length array with flexible-array member
2020-10-29 17:22:59 -05:00
hostfs
…
hpfs
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
hugetlbfs
mm: hugetlbfs: fix cannot migrate the fallocated HugeTLB page
2021-02-10 09:29:20 +01:00
iomap
iomap: clean up writeback state logic on writepage error
2020-11-04 08:52:46 -08:00
isofs
isofs: release buffer head before return
2021-03-04 11:38:00 +01:00
jbd2
jbd2: fix kernel-doc markups
2020-11-19 22:38:29 -05:00
jffs2
jffs2: fix use after free in jffs2_sum_write_data()
2021-03-04 11:37:51 +01:00
jfs
fs/jfs: fix potential integer overflow on shift of a int
2021-03-04 11:37:51 +01:00
kernfs
kernfs: wire up ->splice_read and ->splice_write
2021-01-27 11:55:29 +01:00
lockd
lockd: don't use interval-based rebinding over TCP
2020-12-30 11:53:30 +01:00
minix
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
nfs
NFSv4: Fixes for nfs4_bitmask_adjust()
2021-03-04 11:38:20 +01:00
nfs_common
nfs_common: need lock during iterate through the list
2020-12-30 11:53:45 +01:00
nfsd
nfsd: register pernet ops last, unregister first
2021-03-04 11:38:07 +01:00
nilfs2
nilfs2: make splice write available again
2021-02-13 13:55:16 +01:00
nls
…
notify
fanotify: Fix sys_fanotify_mark() on native x86-32
2021-01-17 14:16:59 +01:00
ntfs
ntfs: check for valid standard information attribute
2021-02-26 10:13:00 +01:00
ocfs2
ocfs2: fix a use after free on error
2021-03-04 11:38:18 +01:00
omfs
fs: omfs: use kmemdup() rather than kmalloc+memcpy
2020-09-22 23:39:45 -04:00
openpromfs
…
orangefs
orangefs: remove unnecessary assignment to variable ret
2020-08-04 15:01:58 -04:00
overlayfs
ovl: expand warning in ovl_d_real()
2021-02-17 11:02:30 +01:00
proc
proc: don't allow async path resolution of /proc/thread-self components
2021-03-04 11:38:42 +01:00
pstore
pstore: Fix typo in compression option name
2021-03-04 11:38:33 +01:00
qnx4
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
qnx6
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
quota
quota: Fix memory leak when handling corrupted quota file
2021-03-04 11:37:53 +01:00
ramfs
ramfs: fix nommu mmap with gaps in the page cache
2020-10-16 11:11:22 -07:00
reiserfs
reiserfs: add check for an invalid ih_entry_count
2021-01-06 14:56:52 +01:00
romfs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
squashfs
squashfs: add more sanity checks in xattr id lookup
2021-02-13 13:55:19 +01:00
sysfs
sysfs: Add sysfs_emit and sysfs_emit_at to format sysfs output
2020-10-02 12:02:30 +02:00
sysv
[PATCH] reduce boilerplate in fsid handling
2020-09-18 16:45:50 -04:00
tracefs
…
ubifs
ubifs: Fix error return code in alloc_wbufs()
2021-03-04 11:37:51 +01:00
udf
udf: fix the problem that the disc content is not displayed
2021-02-07 15:37:15 +01:00
ufs
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
unicode
unicode: Add utf8_casefold_hash
2020-09-10 14:03:31 -07:00
vboxsf
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2020-10-15 15:11:56 -07:00
verity
…
xfs
xfs: revert "xfs: fix rmap key and record comparison functions"
2020-11-19 15:17:50 -08:00
zonefs
zonefs: Fix file size of zones in full condition
2021-03-04 11:38:41 +01:00
aio.c
vfs: separate __sb_start_write into blocking and non-blocking helpers
2020-11-10 16:53:07 -08:00
anon_inodes.c
…
attr.c
…
bad_inode.c
…
binfmt_aout.c
…
binfmt_elf_fdpic.c
binfmt_elf, binfmt_elf_fdpic: use a VMA list snapshot
2020-10-16 11:11:21 -07:00
binfmt_elf.c
fs: Replace zero-length array with flexible-array member
2020-10-29 17:22:59 -05:00
binfmt_em86.c
…
binfmt_flat.c
binfmt_flat: revert "binfmt_flat: don't offset the data start"
2020-08-24 08:49:13 +10:00
binfmt_misc.c
…
binfmt_script.c
…
block_dev.c
Revert "block: simplify set_init_blocksize" to regain lost performance
2021-02-03 23:28:45 +01:00
buffer.c
mm, memcg: rework remote charging API to support nesting
2020-10-18 09:27:09 -07:00
char_dev.c
…
compat_binfmt_elf.c
…
coredump.c
coredump: fix core_pattern parse error
2020-12-06 10:19:07 -08:00
d_path.c
fs: fix NULL dereference due to data race in prepend_path()
2020-10-14 14:54:45 -07:00
dax.c
mm: provide a saner PTE walking API for modules
2021-02-26 10:13:01 +01:00
dcache.c
vfs: Use sequence counter with associated spinlock
2020-07-29 16:14:27 +02:00
dcookies.c
…
direct-io.c
\n
2020-10-15 15:03:10 -07:00
drop_caches.c
…
eventfd.c
…
eventpoll.c
kcmp: Support selection of SYS_kcmp without CHECKPOINT_RESTORE
2021-03-04 11:38:41 +01:00
exec.c
exec: Transform exec_update_mutex into a rw_semaphore
2021-01-09 13:46:24 +01:00
fcntl.c
fcntl: Fix potential deadlock in send_sig{io, urg}()
2021-01-06 14:56:53 +01:00
fhandle.c
…
file_table.c
task_work: cleanup notification modes
2020-10-17 15:05:30 -06:00
file.c
kernel/io_uring: cancel io_uring before task works
2021-01-30 13:55:18 +01:00
filesystems.c
…
fs_context.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
fs_parser.c
fs_parse: mark fs_param_bad_value() as static
2020-10-13 18:38:27 -07:00
fs_pin.c
…
fs_struct.c
vfs: Use sequence counter with associated spinlock
2020-07-29 16:14:27 +02:00
fs_types.c
…
fs-writeback.c
fs: fix lazytime expiration handling in __writeback_single_inode()
2021-01-27 11:54:53 +01:00
fsopen.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
init.c
init: add an init_dup helper
2020-08-04 21:02:38 -04:00
inode.c
fs: Handle I_DONTCACHE in iput_final() instead of generic_drop_inode()
2020-12-30 11:53:49 +01:00
internal.h
fs: remove compat_sys_mount
2020-09-22 23:45:57 -04:00
io_uring.c
io_uring: fix possible deadlock in io_uring_poll
2021-03-04 11:37:49 +01:00
io-wq.c
io_uring: always batch cancel in *cancel_files()
2021-02-13 13:54:56 +01:00
io-wq.h
io_uring: always batch cancel in *cancel_files()
2021-02-13 13:54:56 +01:00
ioctl.c
fs: remove ksys_ioctl
2020-07-31 08:16:01 +02:00
Kconfig
tmpfs: disallow CONFIG_TMPFS_INODE64 on alpha
2021-02-17 11:02:21 +01:00
Kconfig.binfmt
…
kernel_read_file.c
fs/kernel_file_read: Add "offset" arg for partial reads
2020-10-05 13:37:04 +02:00
libfs.c
libfs: fix error cast of negative value in simple_attr_write()
2020-11-22 10:48:22 -08:00
locks.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
Makefile
Refactored code for 5.10:
2020-10-23 11:33:41 -07:00
mbcache.c
…
mount.h
…
mpage.c
…
namei.c
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2020-10-24 12:26:05 -07:00
namespace.c
umount(2): move the flag validity checks first
2021-01-19 18:27:32 +01:00
no-block.c
…
nsfs.c
…
open.c
openat2: reject RESOLVE_BENEATH|RESOLVE_IN_ROOT
2020-12-30 11:54:24 +01:00
pipe.c
fs/pipe: allow sendfile() to pipe again
2021-01-27 11:55:29 +01:00
pnode.c
…
pnode.h
fs/namespace.c: WARN if mnt_count has become negative
2021-01-06 14:56:54 +01:00
posix_acl.c
…
proc_namespace.c
proc mountinfo: make splice available again
2020-12-30 11:54:02 +01:00
read_write.c
Refactored code for 5.10:
2020-10-23 11:33:41 -07:00
readdir.c
fs: remove ksys_getdents64
2020-07-31 08:16:00 +02:00
remap_range.c
vfs: move the remap range helpers to remap_range.c
2020-10-15 09:48:49 -07:00
select.c
poll: fix performance regression due to out-of-line __put_user()
2021-01-19 18:27:27 +01:00
seq_file.c
fix return values of seq_read_iter()
2020-11-15 22:12:53 -05:00
signalfd.c
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
splice.c
io_uring-5.10-2020-10-24
2020-10-24 12:40:18 -07:00
stack.c
…
stat.c
fs: remove KSTAT_QUERY_FLAGS
2020-09-26 22:55:05 -04:00
statfs.c
Add a "nosymfollow" mount option.
2020-08-27 16:06:47 -04:00
super.c
vfs: move __sb_{start,end}_write* to fs.h
2020-11-10 16:53:11 -08:00
sync.c
…
timerfd.c
…
userfaultfd.c
mm: remove the now-unnecessary mmget_still_valid() hack
2020-10-16 11:11:22 -07:00
utimes.c
fs: expose utimes_common
2020-07-31 08:16:01 +02:00
xattr.c
fs/xattr.c: fix kernel-doc warnings for setxattr & removexattr
2020-10-13 18:38:27 -07:00