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Joe Perches f6d3a5562c sysfs: Add sysfs_emit and sysfs_emit_at to format sysfs output 
commit 2efc459d06f1630001e3984854848a5647086232 upstream.

Output defects can exist in sysfs content using sprintf and snprintf.

sprintf does not know the PAGE_SIZE maximum of the temporary buffer
used for outputting sysfs content and it's possible to overrun the
PAGE_SIZE buffer length.

Add a generic sysfs_emit function that knows that the size of the
temporary buffer and ensures that no overrun is done.

Add a generic sysfs_emit_at function that can be used in multiple
call situations that also ensures that no overrun is done.

Validate the output buffer argument to be page aligned.
Validate the offset len argument to be within the PAGE_SIZE buf.

Signed-off-by: Joe Perches <joe@perches.com>
Link: https://lore.kernel.org/r/884235202216d464d61ee975f7465332c86f76b2.1600285923.git.joe@perches.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2021-04-12 12:52:49 +08:00
..
9p 9P: Cast to loff_t before multiplying 2021-03-16 16:40:11 +08:00
adfs Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
affs fs/affs: release old buffer head on error path 2021-04-12 12:52:38 +08:00
afs rxrpc: Fix deadlock around release of dst cached on udp tunnel 2021-04-12 12:51:53 +08:00
autofs Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
befs Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
bfs bfs: don't use WARNING: string when it's just info. 2021-03-16 16:43:53 +08:00
btrfs btrfs: fix error handling in commit_fs_roots 2021-04-12 12:52:48 +08:00
cachefiles cachefiles: Handle readpage error correctly 2021-03-16 16:40:14 +08:00
ceph ceph: fix race in concurrent __ceph_remove_cap invocations 2021-03-16 16:43:35 +08:00
cifs cifs: Set CIFS_MOUNT_USE_PREFIX_PATH flag on setting cifs_sb->prepath. 2021-04-12 12:52:09 +08:00
coda Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
configfs configfs: fix config_item refcnt leak in configfs_rmdir() 2021-03-16 16:28:09 +08:00
cramfs Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
crypto fscrypt: remove kernel-internal constants from UAPI header 2021-03-16 16:43:49 +08:00
debugfs debugfs: do not attempt to create a new file before the filesystem is initalized 2021-04-12 12:52:10 +08:00
devpts Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
dlm fs: dlm: fix configfs memory leak 2021-03-16 16:39:15 +08:00
ecryptfs Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
efivarfs efivarfs: revert "fix memory leak in efivarfs_create()" 2021-03-16 16:41:45 +08:00
efs Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
erofs erofs: fix shift-out-of-bounds of blkszbits 2021-04-12 12:52:44 +08:00
exportfs Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
ext2 ext2: don't update mtime on COW faults 2021-03-16 16:35:36 +08:00
ext4 ext4: fix potential htree index checksum corruption 2021-04-12 12:52:30 +08:00
f2fs f2fs: fix to set/clear I_LINKABLE under i_lock 2021-04-12 12:52:48 +08:00
fat fat: don't allow to mount if the FAT length == 0 2021-03-16 16:29:12 +08:00
freevxfs Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
fscache Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
fuse fuse: fix bad inode 2021-04-12 12:51:05 +08:00
gfs2 gfs2: Recursive gfs2_quota_hold in gfs2_iomap_end 2021-04-12 12:52:40 +08:00
hfs Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
hfsplus hfsplus: fix crash and filesystem corruption when deleting files 2021-03-16 16:26:16 +08:00
hostfs Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
hpfs Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
hugetlbfs mm: hugetlbfs: fix cannot migrate the fallocated HugeTLB page 2021-04-12 12:51:56 +08:00
iomap iomap: fix WARN_ON_ONCE() from unprivileged users 2021-03-16 16:39:20 +08:00
isofs isofs: release buffer head before return 2021-04-12 12:52:25 +08:00
jbd2 jbd2: fix up sparse warnings in checkpoint code 2021-03-16 16:40:54 +08:00
jffs2 jffs2: fix use after free in jffs2_sum_write_data() 2021-04-12 12:52:22 +08:00
jfs JFS: more checks for invalid superblock 2021-04-12 12:52:43 +08:00
kernfs kernfs: do not call fsnotify() with name without a parent 2021-03-16 16:33:35 +08:00
lockd lockd: don't use interval-based rebinding over TCP 2021-03-16 16:42:59 +08:00
minix fs/minix: remove expected error message in block_to_path() 2021-03-16 16:34:21 +08:00
nfs pNFS/NFSv4: Try to return invalid layout in pnfs_layout_process() 2021-04-12 12:51:59 +08:00
nfs_common nfs_common: need lock during iterate through the list 2021-03-16 16:43:09 +08:00
nfsd nfsd: register pernet ops last, unregister first 2021-04-12 12:52:28 +08:00
nilfs2 nilfs2: fix null pointer dereference at nilfs_segctor_do_construct() 2021-03-16 16:29:04 +08:00
nls Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
notify fanotify: fix ignore mask logic for events on child and on dir 2021-03-16 16:28:58 +08:00
ntfs ntfs: check for valid standard information attribute 2021-04-12 12:52:08 +08:00
ocfs2 ocfs2: fix a use after free on error 2021-04-12 12:52:31 +08:00
omfs Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
openpromfs Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
orangefs orangefs: get rid of knob code... 2021-03-16 16:34:10 +08:00
overlayfs ovl: expand warning in ovl_d_real() 2021-04-12 12:52:06 +08:00
proc proc: fix lookup in /proc/net subdirectories after setns(2) 2021-04-12 12:51:06 +08:00
pstore pstore: Fix typo in compression option name 2021-04-12 12:52:36 +08:00
qnx4 Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
qnx6 Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
quota quota: Fix memory leak when handling corrupted quota file 2021-04-12 12:52:22 +08:00
ramfs ramfs: fix nommu mmap with gaps in the page cache 2021-03-16 16:38:58 +08:00
reiserfs reiserfs: add check for an invalid ih_entry_count 2021-03-16 16:43:52 +08:00
romfs romfs: fix uninitialized memory leak in romfs_dev_read() 2021-03-16 16:34:28 +08:00
squashfs squashfs: add more sanity checks in xattr id lookup 2021-04-12 12:52:00 +08:00
sysfs sysfs: Add sysfs_emit and sysfs_emit_at to format sysfs output 2021-04-12 12:52:49 +08:00
sysv Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
tracefs Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
ubifs ubifs: Fix error return code in alloc_wbufs() 2021-04-12 12:52:22 +08:00
udf udf: fix the problem that the disc content is not displayed 2021-04-12 12:51:51 +08:00
ufs fs/ufs: avoid potential u32 multiplication overflow 2021-03-16 16:34:21 +08:00
unicode Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
verity Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
xfs xfs: Fix assert failure in xfs_setattr_size() 2021-04-12 12:52:44 +08:00
Kconfig Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
Kconfig.binfmt Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
Makefile Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
aio.c aio: fix async fsync creds 2021-03-16 16:28:58 +08:00
anon_inodes.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
attr.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
bad_inode.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
binfmt_aout.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
binfmt_elf.c fs/binfmt_elf.c: allocate initialized memory in fill_thread_core_info() 2021-03-16 16:28:37 +08:00
binfmt_elf_fdpic.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
binfmt_em86.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
binfmt_flat.c binfmt_flat: revert "binfmt_flat: don't offset the data start" 2021-03-16 16:34:43 +08:00
binfmt_misc.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
binfmt_script.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
block_dev.c bdev: Reduce time holding bd_mutex in sync in blkdev_close() 2021-03-16 16:37:13 +08:00
buffer.c fs: Don't invalidate page buffers in block_write_full_page() 2021-03-16 16:39:56 +08:00
char_dev.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
compat.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
compat_binfmt_elf.c BACKPORT: Split the old READ_IMPLIES_EXEC workaround from executable 2021-03-16 16:43:59 +08:00
compat_ioctl.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
coredump.c coredump: fix core_pattern parse error 2021-03-16 16:42:04 +08:00
d_path.c fs: fix NULL dereference due to data race in prepend_path() 2021-03-16 16:38:47 +08:00
dax.c mm: provide a saner PTE walking API for modules 2021-04-12 12:52:09 +08:00
dcache.c fix dget_parent() fastpath race 2021-03-16 16:36:39 +08:00
dcookies.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
direct-io.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
drop_caches.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
eventfd.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
eventpoll.c ep_create_wakeup_source(): dentry name can change under you... 2021-03-16 16:37:52 +08:00
exec.c exec: Transform exec_update_mutex into a rw_semaphore 2021-04-12 12:51:05 +08:00
fcntl.c fcntl: Fix potential deadlock in send_sig{io, urg}() 2021-03-16 16:43:54 +08:00
fhandle.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
file.c fix multiplication overflow in copy_fdtable() 2021-03-16 16:28:07 +08:00
file_table.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
filesystems.c fs/filesystems.c: downgrade user-reachable WARN_ONCE() to pr_warn_once() 2021-03-16 16:26:14 +08:00
fs-writeback.c fs: fix lazytime expiration handling in __writeback_single_inode() 2021-04-12 12:51:42 +08:00
fs_context.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
fs_parser.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
fs_pin.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
fs_struct.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
fs_types.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
fsopen.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
inode.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
internal.h Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
io_uring.c io_uring: Fix current->fs handling in io_sq_wq_submit_work() 2021-04-12 12:51:41 +08:00
ioctl.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
libfs.c libfs: fix error cast of negative value in simple_attr_write() 2021-03-16 16:41:24 +08:00
locks.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
mbcache.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
mount.h Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
mpage.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
namei.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
namespace.c fs/namespace.c: WARN if mnt_count has become negative 2021-03-16 16:43:56 +08:00
no-block.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
nsfs.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
open.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
pipe.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
pnode.c propagate_one(): mnt_set_mountpoint() needs mount_lock 2021-03-16 16:27:06 +08:00
pnode.h fs/namespace.c: WARN if mnt_count has become negative 2021-03-16 16:43:56 +08:00
posix_acl.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
proc_namespace.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
read_write.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
readdir.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
select.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
seq_file.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
signalfd.c fs/signalfd.c: fix inconsistent return codes for signalfd4 2021-03-16 16:34:34 +08:00
splice.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
stack.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
stat.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
statfs.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
super.c vfs: remove lockdep bogosity in __sb_start_write 2021-03-16 16:41:11 +08:00
sync.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
timerfd.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
userfaultfd.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
utimes.c Init Repo base on linux 5.4.32 long term, and add base tlinux kernel interfaces. 2021-03-16 11:01:34 +08:00
xattr.c xattr: break delegations in {set,remove}xattr 2021-03-16 16:33:08 +08:00