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Yuntao Wang 229bce543b fs/file: fix the check in find_next_fd() 
[ Upstream commit ed8c7fbdfe117abbef81f65428ba263118ef298a ]

The maximum possible return value of find_next_zero_bit(fdt->full_fds_bits,
maxbit, bitbit) is maxbit. This return value, multiplied by BITS_PER_LONG,
gives the value of bitbit, which can never be greater than maxfd, it can
only be equal to maxfd at most, so the following check 'if (bitbit > maxfd)'
will never be true.

Moreover, when bitbit equals maxfd, it indicates that there are no unused
fds, and the function can directly return.

Fix this check.

Signed-off-by: Yuntao Wang <yuntao.wang@linux.dev>
Link: https://lore.kernel.org/r/20240529160656.209352-1-yuntao.wang@linux.dev
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-07-27 10:40:18 +02:00
..
9p
fs/9p: drop inodes immediately on non-.L too
2024-05-17 11:48:05 +02:00
adfs
…
affs
affs: initialize fsdata in affs_truncate()
2023-02-01 08:23:11 +01:00
afs
afs: Don't cross .backup mountpoint from backup volume
2024-06-16 13:32:30 +02:00
autofs
file: Replace ksys_close with close_fd
2024-06-21 14:52:50 +02:00
befs
…
bfs
…
btrfs
btrfs: fix leak of qgroup extent records after transaction abort
2024-07-05 09:12:25 +02:00
cachefiles
namei: introduce struct renamedata
2024-06-21 14:52:59 +02:00
ceph
ceph: prevent use-after-free in encode_cap_msg()
2024-02-23 08:42:29 +01:00
cifs
smb: client: fix deadlock in smb2_find_smb_tcon()
2024-07-05 09:12:45 +02:00
coda
coda: Avoid partial allocation of sig_inputArgs
2023-03-11 16:39:51 +01:00
configfs
Revert "configfs: fix a race in configfs_lookup()"
2023-09-21 09:45:15 +02:00
cramfs
…
crypto
fscrypt: fix keyring memory leak on mount failure
2022-11-10 18:14:25 +01:00
debugfs
debugfs: fix automount d_fsdata usage
2024-01-25 14:37:36 -08:00
devpts
fsnotify: fix fsnotify hooks in pseudo filesystems
2022-02-01 17:25:39 +01:00
dlm
dlm: fix plock lookup when using multiple lockspaces
2023-09-19 12:20:22 +02:00
ecryptfs
namei: introduce struct renamedata
2024-06-21 14:52:59 +02:00
efivarfs
efivarfs: force RO when remounting if SetVariable is not supported
2024-01-25 14:37:40 -08:00
efs
…
erofs
erofs: fix lz4 inplace decompression
2024-03-01 13:16:48 +01:00
exfat
exfat: support handle zero-size directory
2023-11-28 16:54:52 +00:00
exportfs
exportfs: use pr_debug for unreachable debug statements
2024-06-21 14:54:05 +02:00
ext2
ext2: fix datatype of block number in ext2_xattr_set2()
2023-09-23 11:01:07 +02:00
ext4
ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()
2024-06-16 13:32:36 +02:00
f2fs
f2fs: remove clear SB_INLINECRYPT flag in default_options
2024-07-05 09:12:36 +02:00
fat
fat: fix uninitialized field in nostale filehandles
2024-04-13 12:58:08 +02:00
freevxfs
…
fscache
fscache: Fix cookie key hashing
2021-09-18 13:40:15 +02:00
fuse
fuse: don't unhash root
2024-04-13 12:58:19 +02:00
gfs2
gfs2: Fix "ignore unlock failures after withdraw"
2024-06-16 13:32:05 +02:00
hfs
hfs: fix missing hfs_bnode_get() in __hfs_bnode_create
2023-03-11 16:39:55 +01:00
hfsplus
fs: hfsplus: remove WARN_ON() from hfsplus_cat_{read,write}_inode()
2023-05-30 12:57:47 +01:00
hostfs
hostfs: fix memory handling in follow_link()
2021-04-14 08:42:06 +02:00
hpfs
…
hugetlbfs
mm: hugetlb pages should not be reserved by shmat() if SHM_NORESERVE
2024-03-15 10:48:22 -04:00
iomap
xfs: use current->journal_info for detecting transaction recursion
2022-07-07 17:52:19 +02:00
isofs
isofs: handle CDs with bad root inode but good Joliet root directory
2024-04-13 12:59:46 +02:00
jbd2
jbd2: Fix wrongly judgement for buffer head removing while doing checkpoint
2024-03-01 13:16:47 +01:00
jffs2
jffs2: Fix potential illegal address access in jffs2_free_inode
2024-07-18 13:05:41 +02:00
jfs
jfs: xattr: fix buffer overflow for invalid xattr
2024-07-05 09:12:25 +02:00
kernfs
fs/kernfs/dir: obey S_ISGID
2024-02-23 08:42:14 +01:00
lockd
lockd: drop inappropriate svc_get() from locked_get()
2024-06-21 14:54:14 +02:00
minix
minix: fix bug when opening a file with O_DIRECT
2022-04-13 21:01:01 +02:00
nfs
nfs: Leave pages in the pagecache if readpage failed
2024-07-05 09:12:55 +02:00
nfs_common
NFSD: Add an xdr_stream-based encoder for NFSv2/3 ACLs
2024-06-21 14:53:03 +02:00
nfsd
nfsd: hold a lighter-weight client reference over CB_RECALL_ANY
2024-07-05 09:12:48 +02:00
nilfs2
nilfs2: fix kernel bug on rename operation of broken directory
2024-07-18 13:05:50 +02:00
nls
fs/nls: make load_nls() take a const parameter
2023-09-19 12:20:04 +02:00
notify
fanotify: Remove obsoleted fanotify_event_has_path()
2024-06-21 14:54:03 +02:00
ntfs
ntfs: check overflow when iterating ATTR_RECORDs
2022-11-25 17:45:57 +01:00
ocfs2
ocfs2: fix DIO failure due to insufficient transaction credits
2024-07-05 09:12:51 +02:00
omfs
…
openpromfs
openpromfs: finish conversion to the new mount API
2024-06-16 13:32:01 +02:00
orangefs
orangefs: fix out-of-bounds fsid access
2024-07-18 13:05:40 +02:00
overlayfs
namei: introduce struct renamedata
2024-06-21 14:52:59 +02:00
proc
fs/proc: fix softlockup in __read_vmcore
2024-07-05 09:12:30 +02:00
pstore
pstore/zone: Add a null pointer check to the psz_kmsg_read
2024-04-13 12:59:41 +02:00
qnx4
qnx4: work around gcc false positive warning bug
2021-09-30 10:11:08 +02:00
qnx6
…
quota
quota: Fix rcu annotations of inode dquot pointers
2024-03-26 18:21:56 -04:00
ramfs
shmem: use ramfs_kill_sb() for kill_sb method of ramfs-based tmpfs
2023-07-27 08:44:13 +02:00
reiserfs
reiserfs: Check the return value from __getblk()
2023-09-19 12:20:06 +02:00
romfs
…
squashfs
revert "squashfs: harden sanity check in squashfs_read_xattr_id_table"
2023-02-22 12:55:56 +01:00
sysfs
fs: sysfs: Fix reference leak in sysfs_break_active_protection()
2024-05-02 16:23:39 +02:00
sysv
sysv: don't call sb_bread() with pointers_lock held
2024-04-13 12:59:45 +02:00
tracefs
tracefs: Add missing lockdown check to tracefs_create_dir()
2023-09-23 11:01:10 +02:00
ubifs
ubifs: Set page uptodate in the correct place
2024-04-13 12:58:09 +02:00
udf
udf: udftime: prevent overflow in udf_disk_stamp_to_time()
2024-07-05 09:12:36 +02:00
ufs
…
unicode
…
vboxsf
vboxsf: Avoid an spurious warning if load_nls_xxx() fails
2024-04-13 12:59:25 +02:00
verity
fs: add file and path permissions helpers
2024-06-21 14:52:58 +02:00
xfs
xfs: verify buffer contents when we skip log replay
2023-06-14 11:09:59 +02:00
zonefs
zonefs: Improve error handling
2024-03-01 13:16:43 +01:00
aio.c
fs/aio: Check IOCB_AIO_RW before the struct aio_kiocb conversion
2024-04-13 12:58:53 +02:00
anon_inodes.c
…
attr.c
attr: block mode changes of symlinks
2023-09-23 11:01:09 +02:00
bad_inode.c
…
binfmt_aout.c
…
binfmt_elf_fdpic.c
fs: binfmt_elf_efpic: fix personality for ELF-FDPIC
2023-10-10 21:53:35 +02:00
binfmt_elf.c
fs/binfmt_elf: Fix memory leak in load_elf_binary()
2022-11-03 23:57:49 +09:00
binfmt_em86.c
…
binfmt_flat.c
binfmt_flat: do not stop relocating GOT entries prematurely on riscv
2022-06-09 10:20:47 +02:00
binfmt_misc.c
binfmt_misc: fix shift-out-of-bounds in check_special_flags
2023-01-14 10:16:13 +01:00
binfmt_script.c
…
block_dev.c
block: Don't invalidate pagecache for invalid falloc modes
2024-01-15 18:48:03 +01:00
buffer.c
mm: fs: initialize fsdata passed to write_begin/write_end interface
2022-11-25 17:45:56 +01:00
char_dev.c
chardev: fix error handling in cdev_device_add()
2023-01-14 10:15:59 +01:00
compat_binfmt_elf.c
…
coredump.c
exec: Simplify unshare_files
2024-06-21 14:52:47 +02:00
d_path.c
…
dax.c
dax: fix cache flush on PMD-mapped pages
2022-06-09 10:21:16 +02:00
dcache.c
vfs: don't mod negative dentry count when on shrinker list
2024-07-18 13:05:45 +02:00
dcookies.c
…
direct-io.c
fs: direct-io: fix missing sdio->boundary
2021-04-14 08:41:58 +02:00
drop_caches.c
…
eventfd.c
eventfd: prevent underflow for eventfd semaphores
2023-09-19 12:20:06 +02:00
eventpoll.c
epoll: ep_autoremove_wake_function should use list_del_init_careful
2023-06-21 15:45:37 +02:00
exec.c
exec: Simplify unshare_files
2024-06-21 14:52:47 +02:00
fcntl.c
fcntl: fix potential deadlocks for &fown_struct.lock
2022-10-30 09:41:18 +01:00
fhandle.c
do_sys_name_to_handle(): use kzalloc() to fix kernel-infoleak
2024-03-26 18:21:47 -04:00
file_table.c
SUNRPC: Ensure we flush any closed sockets before xs_xprt_free()
2022-05-18 10:23:48 +02:00
file.c
fs/file: fix the check in find_next_fd()
2024-07-27 10:40:18 +02:00
filesystems.c
…
fs_context.c
fs: avoid empty option when generating legacy mount string
2023-07-27 08:44:13 +02:00
fs_parser.c
…
fs_pin.c
…
fs_struct.c
…
fs_types.c
…
fs-writeback.c
writeback: fix call of incorrect macro
2023-05-17 11:48:10 +02:00
fsopen.c
…
init.c
fs: add file and path permissions helpers
2024-06-21 14:52:58 +02:00
inode.c
fs: add ctime accessors infrastructure
2023-12-08 08:46:15 +01:00
internal.h
fs: Establish locking order for unrelated directories
2023-07-27 08:44:13 +02:00
ioctl.c
lsm: new security_file_ioctl_compat() hook
2024-02-23 08:41:53 +01:00
Kconfig
NFSD: Remove CONFIG_NFSD_V3
2024-06-21 14:53:37 +02:00
Kconfig.binfmt
…
kernel_read_file.c
vfs: check fd has read access in kernel_read_file_from_fd()
2021-10-27 09:56:51 +02:00
libfs.c
libfs: add DEFINE_SIMPLE_ATTRIBUTE_SIGNED for signed value
2023-01-14 10:15:19 +01:00
locks.c
filelock: Remove locks reliably when fcntl/close race is detected
2024-07-27 10:40:16 +02:00
Makefile
io_uring: import 5.15-stable io_uring
2023-01-04 11:39:23 +01:00
mbcache.c
mbcache: Avoid nesting of cache->c_list_lock under bit locks
2023-01-14 10:16:50 +01:00
mount.h
…
mpage.c
…
namei.c
namei: introduce struct renamedata
2024-06-21 14:52:59 +02:00
namespace.c
fs: indicate request originates from old mount API
2024-01-25 14:37:42 -08:00
no-block.c
…
nsfs.c
…
open.c
ftruncate: pass a signed offset
2024-07-05 09:12:55 +02:00
pipe.c
pipe: wakeup wr_wait after setting max_usage
2024-02-23 08:42:00 +01:00
pnode.c
pnode: terminate at peers of source
2023-01-14 10:16:27 +01:00
pnode.h
…
posix_acl.c
…
proc_namespace.c
…
read_write.c
vfs: fix copy_file_range() averts filesystem freeze protection
2022-12-19 12:27:30 +01:00
readdir.c
readdir: make sure to verify directory entry for legacy interfaces too
2021-04-21 13:00:54 +02:00
remap_range.c
fs/remap: constrain dedupe of EOF blocks
2022-07-21 21:20:01 +02:00
select.c
fs/select: rework stack allocation hack for clang
2024-03-26 18:21:47 -04:00
seq_file.c
seq_file: disallow extremely large seq buffer allocations
2021-07-20 16:05:59 +02:00
signalfd.c
io_uring: disable polling pollfree files
2022-09-05 10:28:58 +02:00
splice.c
Revert "fs: check FMODE_LSEEK to control internal pipe splicing"
2022-10-17 17:26:07 +02:00
stack.c
…
stat.c
stat: fix inconsistency between struct stat and struct compat_stat
2022-04-27 13:53:54 +02:00
statfs.c
statfs: enforce statfs[64] structure initialization
2023-05-30 12:57:55 +01:00
super.c
fs: Protect reconfiguration of sb read-write from racing writes
2023-08-11 11:57:54 +02:00
sync.c
vfs: make sync_filesystem return errors from ->sync_fs
2022-08-31 17:15:14 +02:00
timerfd.c
…
userfaultfd.c
userfaultfd: open userfaultfds with O_RDONLY
2022-10-26 13:25:17 +02:00
utimes.c
…
xattr.c
fs: don't audit the capability check in simple_xattr_list()
2023-01-14 10:15:16 +01:00