linux-brain/Documentation/filesystems
Joe Perches 5f42436428 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>
2021-03-07 12:20:48 +01:00
..
caching Documentation: Use "while" instead of "whilst" 2018-11-20 09:30:43 -07:00
cifs various cifs/smb3 fixes (including for share deleted cases) and features including improved encrypted read performance, and various debugging improvements 2019-09-19 10:32:16 -07:00
configfs configfs: fix wrong name of struct in documentation 2018-12-20 08:41:38 -07:00
ext4 Added new ext4 debugging ioctls to allow userspace to get information 2019-09-21 13:37:39 -07:00
nfs docs: fs: convert docs without extension to ReST 2019-07-31 13:31:05 -06:00
9p.txt
adfs.txt
affs.txt affs: fix basic permission bits to actually work 2020-09-09 19:12:34 +02:00
afs.txt afs: Implement @sys substitution handling 2018-04-09 21:12:31 +01:00
api-summary.rst docs: no structured comments in fs/file_table.c 2019-05-24 15:03:39 -06:00
autofs-mount-control.txt autofs: update mount control expire desription with AUTOFS_EXP_FORCED 2019-05-14 19:52:50 -07:00
autofs.txt autofs: add description of ignore pseudo mount option 2019-05-14 19:52:50 -07:00
automount-support.txt autofs: use autofs instead of autofs4 in documentation 2018-06-07 17:34:39 -07:00
befs.txt
bfs.txt Tigran has moved 2017-05-12 15:57:15 -07:00
btrfs.txt
ceph.txt ceph: auto reconnect after blacklisted 2019-09-16 12:06:24 +02:00
coda.txt coda: Fix typo in the struct CodaCred documentation 2019-07-30 14:19:41 -06:00
cramfs.txt cramfs: rehabilitate it 2017-10-15 00:47:23 -04:00
dax.txt Documentation: filesystem: Convert xfs.txt to ReST 2019-07-15 09:15:09 -07:00
debugfs.txt debugfs: make debugfs_create_u32_array() return void 2019-06-03 16:34:27 +02:00
devpts.txt
directory-locking.rst docs: fs: convert docs without extension to ReST 2019-07-31 13:31:05 -06:00
dlmfs.txt
dnotify.txt Documentation: fix selftests related file refs 2017-10-19 12:58:21 -06:00
ecryptfs.txt
efivarfs.txt
erofs.txt erofs: kill use_vmap module parameter 2019-09-05 20:10:09 +02:00
ext2.txt doc: ext2: update description of quota options for ext2 2019-05-20 10:50:48 +02:00
ext3.txt
f2fs.txt f2fs: add missing documents of reserve_root/resuid/resgid 2019-09-06 16:18:26 -07:00
fiemap.txt
files.txt
fscrypt.rst ext4 crypto: fix to check feature status before get policy 2019-08-31 10:00:29 -05:00
fsverity.rst fs-verity: add a documentation file 2019-07-28 16:59:15 -07:00
fuse-io.txt fuse: add writeback documentation 2018-03-20 17:11:45 +01:00
fuse.txt
gfs2-glocks.txt GFS2: Minor improvements to comments and documentation 2018-04-12 10:07:51 -07:00
gfs2-uevents.txt
gfs2.txt
hfs.txt
hfsplus.txt
hpfs.txt
index.rst add virtio-fs 2019-09-27 15:54:24 -07:00
inotify.txt
isofs.txt
journalling.rst docs: Bring some order to filesystem documentation 2019-03-06 09:46:10 -07:00
locking.rst docs: fs: convert docs without extension to ReST 2019-07-31 13:31:05 -06:00
locks.txt
mandatory-locking.txt locks: print a warning when mount fails due to lack of "mand" support 2019-08-16 12:13:48 -04:00
mount_api.txt vfs: Update mount API docs 2019-03-28 08:54:20 -07:00
nilfs2.txt MAINTAINERS, nilfs2: change project home URLs 2018-01-13 10:42:48 -08:00
ntfs.txt
ocfs2-online-filecheck.txt
ocfs2.txt
omfs.txt
orangefs.txt Orangefs: documentation updates 2018-04-04 14:05:48 -04:00
overlayfs.txt ovl: fix regression caused by overlapping layers detection 2019-07-16 13:23:40 +02:00
path-lookup.rst docs: Bring some order to filesystem documentation 2019-03-06 09:46:10 -07:00
path-lookup.txt
porting.rst cifs_atomic_open(): fix double-put on late allocation failure 2020-03-18 07:17:51 +01:00
proc.txt mm: thp: fix false negative of shmem vma's THP eligibility 2019-07-18 17:08:06 -07:00
qnx6.txt Documentation: Use "while" instead of "whilst" 2018-11-20 09:30:43 -07:00
quota.txt
ramfs-rootfs-initramfs.txt docs: early-userspace: move to driver-api guide 2019-07-15 11:03:01 -03:00
relay.txt Documentation : Update relay function types 2018-07-10 15:11:00 -06:00
romfs.txt
seq_file.txt seq_file: document how per-entry resources are managed. 2021-03-04 10:26:48 +01:00
sharedsubtree.txt
splice.rst docs: Bring some order to filesystem documentation 2019-03-06 09:46:10 -07:00
spufs.txt Documentation: fix spelling mistake, EACCESS -> EACCES 2018-11-07 15:28:55 -07:00
squashfs.txt
sysfs-pci.txt
sysfs-tagging.txt
sysfs.txt sysfs: Add sysfs_emit and sysfs_emit_at to format sysfs output 2021-03-07 12:20:48 +01:00
sysv-fs.txt
tmpfs.txt docs: cgroup-v1: add it to the admin-guide book 2019-07-15 11:03:02 -03:00
ubifs-authentication.rst docs: ubifs-authentication.md: convert to ReST 2019-07-31 13:25:22 -06:00
ubifs.txt ubifs: Enable authentication support 2018-10-23 13:49:01 +02:00
udf.txt udf: Remove never implemented mount options 2018-02-27 10:25:33 +01:00
vfat.txt Documentation/filesystems/vfat.txt: fix a remark that implies UCS2 2017-12-21 13:39:28 -07:00
vfs.rst docs: fs: convert docs without extension to ReST 2019-07-31 13:31:05 -06:00
virtiofs.rst virtio-fs: add Documentation/filesystems/virtiofs.rst 2019-09-18 15:09:34 +02:00
xfs-delayed-logging-design.txt Documentation: xfs: Fix typo 2019-06-07 11:42:20 -06:00
xfs-self-describing-metadata.txt xfs: add struct xfs_mount pointer to struct xfs_buf 2019-06-28 19:27:29 -07:00