Alexey Dobriyan 9ea03f6890 proc: fix lookup in /proc/net subdirectories after setns(2) ... [ Upstream commit c6c75deda81344c3a95d1d1f606d5cee109e5d54 ] Commit 1fde6f21d9 ("proc: fix /proc/net/* after setns(2)") only forced revalidation of regular files under /proc/net/ However, /proc/net/ is unusual in the sense of /proc/net/foo handlers take netns pointer from parent directory which is old netns. Steps to reproduce: (void)open("/proc/net/sctp/snmp", O_RDONLY); unshare(CLONE_NEWNET); int fd = open("/proc/net/sctp/snmp", O_RDONLY); read(fd, &c, 1); Read will read wrong data from original netns. Patch forces lookup on every directory under /proc/net . Link: https://lkml.kernel.org/r/20201205160916.GA109739@localhost.localdomain Fixes: 1da4d377f9 ("proc: revalidate misc dentries") Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Reported-by: "Rantala, Tommi T. (Nokia - FI/Espoo)" <tommi.t.rantala@nokia.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-01-12 20:16:10 +01:00
..
9p	9P: Cast to loff_t before multiplying	2020-11-05 11:43:34 +01:00
adfs	…
affs	affs: fix basic permission bits to actually work	2020-09-09 19:12:34 +02:00
afs	afs: Fix memory leak when mounting with multiple source parameters	2020-12-30 11:50:54 +01:00
autofs	…
befs	…
bfs	bfs: don't use WARNING: string when it's just info.	2021-01-06 14:48:39 +01:00
btrfs	btrfs: fix race when defragmenting leads to unnecessary IO	2021-01-06 14:48:36 +01:00
cachefiles	cachefiles: Handle readpage error correctly	2020-11-05 11:43:36 +01:00
ceph	ceph: fix race in concurrent __ceph_remove_cap invocations	2020-12-30 11:51:40 +01:00
cifs	SMB3: avoid confusing warning message on mount to Azure	2020-12-30 11:51:40 +01:00
coda	…
configfs	…
cramfs	…
crypto	fscrypt: remove kernel-internal constants from UAPI header	2021-01-06 14:48:35 +01:00
debugfs	debugfs: Fix module state check condition	2020-09-17 13:47:55 +02:00
devpts	…
dlm	fs: dlm: fix configfs memory leak	2020-10-29 09:58:03 +01:00
ecryptfs	…
efivarfs	efivarfs: revert "fix memory leak in efivarfs_create()"	2020-12-02 08:49:53 +01:00
efs	…
erofs	erofs: avoid using generic_block_bmap	2020-12-30 11:51:23 +01:00
exportfs	…
ext2	ext2: don't update mtime on COW faults	2020-09-09 19:12:30 +02:00
ext4	ext4: don't remount read-only with errors=continue on reboot	2021-01-06 14:48:36 +01:00
f2fs	f2fs: avoid race condition for shrinker count	2021-01-06 14:48:40 +01:00
fat	fat: don't allow to mount if the FAT length == 0	2020-06-17 16:40:36 +02:00
freevxfs	…
fscache	…
fuse	fuse: fix bad inode	2021-01-09 13:44:54 +01:00
gfs2	gfs2: check for empty rgrp tree in gfs2_ri_update	2020-12-11 13:23:32 +01:00
hfs	…
hfsplus	…
hostfs	…
hpfs	…
hugetlbfs	hugetlbfs: prevent filesystem stacking of hugetlbfs	2020-09-03 11:26:48 +02:00
iomap	iomap: fix WARN_ON_ONCE() from unprivileged users	2020-10-29 09:58:06 +01:00
isofs	…
jbd2	jbd2: fix up sparse warnings in checkpoint code	2020-11-18 19:20:30 +01:00
jffs2	jffs2: Fix NULL pointer dereference in rp_size fs option parsing	2021-01-06 14:48:37 +01:00
jfs	jfs: Fix array index bounds check in dbAdjTree	2020-12-30 11:51:40 +01:00
kernfs	kernfs: do not call fsnotify() with name without a parent	2020-08-19 08:16:12 +02:00
lockd	lockd: don't use interval-based rebinding over TCP	2020-12-30 11:51:16 +01:00
minix	fs/minix: remove expected error message in block_to_path()	2020-08-21 13:05:37 +02:00
nfs	NFSv4: Fix a pNFS layout related use-after-free race when freeing the inode	2021-01-06 14:48:40 +01:00
nfs_common	nfs_common: need lock during iterate through the list	2020-12-30 11:51:22 +01:00
nfsd	nfsd: Fix message level for normal termination	2020-12-30 11:51:22 +01:00
nilfs2	nilfs2: fix null pointer dereference at nilfs_segctor_do_construct()	2020-06-17 16:40:29 +02:00
nls	…
notify	fanotify: fix ignore mask logic for events on child and on dir	2020-06-17 16:40:24 +02:00
ntfs	ntfs: add check for mft record size in superblock	2020-10-29 09:58:03 +01:00
ocfs2	ocfs2: initialize ip_next_orphan	2020-11-18 19:20:30 +01:00
omfs	…
openpromfs	…
orangefs	orangefs: get rid of knob code...	2020-08-21 13:05:29 +02:00
overlayfs	ovl: fix unneeded call to ovl_change_flags()	2020-07-22 09:33:12 +02:00
proc	proc: fix lookup in /proc/net subdirectories after setns(2)	2021-01-12 20:16:10 +01:00
pstore	pstore: Fix linking when crypto API disabled	2020-08-19 08:16:27 +02:00
qnx4	…
qnx6	…
quota	quota: Don't overflow quota file offsets	2021-01-06 14:48:39 +01:00
ramfs	ramfs: fix nommu mmap with gaps in the page cache	2020-10-29 09:57:53 +01:00
reiserfs	reiserfs: add check for an invalid ih_entry_count	2021-01-06 14:48:38 +01:00
romfs	romfs: fix uninitialized memory leak in romfs_dev_read()	2020-08-26 10:40:51 +02:00
squashfs	…
sysfs	…
sysv	…
tracefs	…
ubifs	ubifs: prevent creating duplicate encrypted filenames	2021-01-06 14:48:35 +01:00
udf	udf: Fix memory leak when mounting	2020-11-05 11:43:29 +01:00
ufs	fs/ufs: avoid potential u32 multiplication overflow	2020-08-21 13:05:37 +02:00
unicode	…
verity	…
xfs	xfs: revert "xfs: fix rmap key and record comparison functions"	2020-11-24 13:29:18 +01:00
Kconfig	…
Kconfig.binfmt	…
Makefile	…
aio.c	aio: fix async fsync creds	2020-06-17 16:40:24 +02:00
anon_inodes.c	…
attr.c	…
bad_inode.c	…
binfmt_aout.c	…
binfmt_elf.c	…
binfmt_elf_fdpic.c	…
binfmt_em86.c	…
binfmt_flat.c	binfmt_flat: revert "binfmt_flat: don't offset the data start"	2020-09-03 11:26:39 +02:00
binfmt_misc.c	…
binfmt_script.c	…
block_dev.c	bdev: Reduce time holding bd_mutex in sync in blkdev_close()	2020-10-01 13:17:55 +02:00
buffer.c	fs: Don't invalidate page buffers in block_write_full_page()	2020-11-05 11:43:24 +01:00
char_dev.c	…
compat.c	…
compat_binfmt_elf.c	…
compat_ioctl.c	…
coredump.c	coredump: fix core_pattern parse error	2020-12-11 13:23:30 +01:00
d_path.c	fs: fix NULL dereference due to data race in prepend_path()	2020-10-29 09:57:45 +01:00
dax.c	…
dcache.c	fix dget_parent() fastpath race	2020-10-01 13:17:19 +02:00
dcookies.c	…
direct-io.c	…
drop_caches.c	…
eventfd.c	…
eventpoll.c	ep_create_wakeup_source(): dentry name can change under you...	2020-10-07 08:01:31 +02:00
exec.c	exec: Transform exec_update_mutex into a rw_semaphore	2021-01-09 13:44:55 +01:00
fcntl.c	fcntl: Fix potential deadlock in send_sig{io, urg}()	2021-01-06 14:48:39 +01:00
fhandle.c	…
file.c	…
file_table.c	…
filesystems.c	…
fs-writeback.c	writeback: Fix sync livelock due to b_dirty_time processing	2020-09-03 11:27:04 +02:00
fs_context.c	…
fs_parser.c	…
fs_pin.c	…
fs_struct.c	…
fs_types.c	…
fsopen.c	…
inode.c	…
internal.h	…
io_uring.c	io_uring: Fix double list add in io_queue_async_work()	2020-10-14 10:32:57 +02:00
ioctl.c	…
libfs.c	libfs: fix error cast of negative value in simple_attr_write()	2020-11-24 13:29:19 +01:00
locks.c	…
mbcache.c	…
mount.h	…
mpage.c	…
namei.c	…
namespace.c	fs/namespace.c: WARN if mnt_count has become negative	2021-01-06 14:48:40 +01:00
no-block.c	…
nsfs.c	…
open.c	…
pipe.c	…
pnode.c	…
pnode.h	fs/namespace.c: WARN if mnt_count has become negative	2021-01-06 14:48:40 +01:00
posix_acl.c	…
proc_namespace.c	…
read_write.c	…
readdir.c	…
select.c	…
seq_file.c	…
signalfd.c	fs/signalfd.c: fix inconsistent return codes for signalfd4	2020-08-26 10:40:58 +02:00
splice.c	…
stack.c	…
stat.c	…
statfs.c	…
super.c	vfs: remove lockdep bogosity in __sb_start_write	2020-11-24 13:29:01 +01:00
sync.c	…
timerfd.c	…
userfaultfd.c	…
utimes.c	…
xattr.c	xattr: break delegations in {set,remove}xattr	2020-08-11 15:33:39 +02:00