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Phillip Lougher 3654a0ed0b squashfs: add more sanity checks in xattr id lookup 
commit 506220d2ba upstream.

Sysbot has reported a warning where a kmalloc() attempt exceeds the
maximum limit.  This has been identified as corruption of the xattr_ids
count when reading the xattr id lookup table.

This patch adds a number of additional sanity checks to detect this
corruption and others.

1. It checks for a corrupted xattr index read from the inode.  This could
   be because the metadata block is uncompressed, or because the
   "compression" bit has been corrupted (turning a compressed block
   into an uncompressed block).  This would cause an out of bounds read.

2. It checks against corruption of the xattr_ids count.  This can either
   lead to the above kmalloc failure, or a smaller than expected
   table to be read.

3. It checks the contents of the index table for corruption.

[phillip@squashfs.org.uk: fix checkpatch issue]
  Link: https://lkml.kernel.org/r/270245655.754655.1612770082682@webmail.123-reg.co.uk

Link: https://lkml.kernel.org/r/20210204130249.4495-5-phillip@squashfs.org.uk
Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
Reported-by: syzbot+2ccea6339d368360800d@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2021-02-13 13:52:57 +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
rxrpc: Fix deadlock around release of dst cached on udp tunnel
2021-02-10 09:25:27 +01:00
autofs
autofs: fix a leak in autofs_expire_indirect()
2019-10-25 00:03:11 -04:00
befs
…
bfs
bfs: don't use WARNING: string when it's just info.
2021-01-06 14:48:39 +01:00
btrfs
btrfs: backref, use correct count to resolve normal data refs
2021-02-07 15:35:47 +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: fix crediting for compounding when only one request in flight
2021-02-10 09:25:30 +01:00
coda
…
configfs
configfs: fix config_item refcnt leak in configfs_rmdir()
2020-05-27 17:46:30 +02:00
cramfs
cramfs: fix usage on non-MTD device
2019-11-23 21:44:49 -05:00
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
ecryptfs: replace BUG_ON with error handling code
2020-02-28 17:22:26 +01:00
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
exportfs_decode_fh(): negative pinned may become positive without the parent locked
2019-11-10 11:56:05 -05:00
ext2
ext2: don't update mtime on COW faults
2020-09-09 19:12:30 +02:00
ext4
writeback: Drop I_DIRTY_TIME_EXPIRE
2021-01-30 13:54:11 +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
hfsplus: fix crash and filesystem corruption when deleting files
2020-04-17 10:50:22 +02:00
hostfs
…
hpfs
…
hugetlbfs
mm: hugetlbfs: fix cannot migrate the fallocated HugeTLB page
2021-02-10 09:25:31 +01:00
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
pNFS/NFSv4: Try to return invalid layout in pnfs_layout_process()
2021-02-13 13:52:55 +01:00
nfs_common
nfs_common: need lock during iterate through the list
2020-12-30 11:51:22 +01:00
nfsd
nfsd4: readdirplus shouldn't return parent of export
2021-01-23 15:57:56 +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 dentry leak in ovl_get_redirect
2021-02-10 09:25:29 +01:00
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
squashfs: add more sanity checks in xattr id lookup
2021-02-13 13:52:57 +01:00
sysfs
…
sysv
…
tracefs
tracing: Do not create tracefs files if tracefs lockdown is in effect
2019-10-12 20:49:07 -04:00
ubifs
ubifs: prevent creating duplicate encrypted filenames
2021-01-06 14:48:35 +01:00
udf
udf: fix the problem that the disc content is not displayed
2021-02-07 15:35:49 +01:00
ufs
fs/ufs: avoid potential u32 multiplication overflow
2020-08-21 13:05:37 +02:00
unicode
…
verity
…
xfs
writeback: Drop I_DIRTY_TIME_EXPIRE
2021-01-30 13:54:11 +01:00
aio.c
aio: fix async fsync creds
2020-06-17 16:40:24 +02:00
anon_inodes.c
…
attr.c
utimes: Clamp the timestamps in notify_change()
2020-02-11 04:35:12 -08:00
bad_inode.c
…
binfmt_aout.c
…
binfmt_elf_fdpic.c
…
binfmt_elf.c
fs/binfmt_elf.c: allocate initialized memory in fill_thread_core_info()
2020-06-03 08:21:27 +02:00
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
chardev: Avoid potential use-after-free in 'chrdev_open()'
2020-01-14 20:08:18 +01:00
compat_binfmt_elf.c
…
compat_ioctl.c
fix compat handling of FICLONERANGE, FIDEDUPERANGE and FS_IOC_FIEMAP
2020-01-09 10:20:05 +01:00
compat.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
dax: pass NOWAIT flag to iomap_apply
2020-03-05 16:43:36 +01:00
dcache.c
fix dget_parent() fastpath race
2020-10-01 13:17:19 +02:00
dcookies.c
…
direct-io.c
fs/direct-io.c: fix kernel-doc warning
2019-10-14 15:04:01 -07:00
drop_caches.c
fs: avoid softlockups in s_inodes iterators
2020-01-12 12:21:37 +01:00
eventfd.c
eventfd: track eventfd_signal() recursion depth
2020-02-11 04:35:37 -08:00
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_table.c
…
file.c
fix multiplication overflow in copy_fdtable()
2020-05-27 17:46:12 +02:00
filesystems.c
fs/filesystems.c: downgrade user-reachable WARN_ONCE() to pr_warn_once()
2020-04-17 10:50:21 +02:00
fs_context.c
…
fs_parser.c
…
fs_pin.c
…
fs_struct.c
…
fs_types.c
…
fs-writeback.c
fs: fix lazytime expiration handling in __writeback_single_inode()
2021-01-30 13:54:11 +01:00
fsopen.c
…
inode.c
futex: Fix inode life-time issue
2020-03-25 08:25:58 +01:00
internal.h
fs: move guard_bio_eod() after bio_set_op_attrs
2020-01-17 19:48:21 +01:00
io_uring.c
io_uring: Fix current->fs handling in io_sq_wq_submit_work()
2021-01-30 13:54:10 +01:00
ioctl.c
compat_ioctl: add compat_ptr_ioctl()
2019-12-17 19:55:30 +01:00
Kconfig
…
Kconfig.binfmt
…
libfs.c
libfs: fix error cast of negative value in simple_attr_write()
2020-11-24 13:29:19 +01:00
locks.c
locks: reinstate locks_delete_block optimization
2020-03-25 08:25:41 +01:00
Makefile
…
mbcache.c
…
mount.h
…
mpage.c
fs: move guard_bio_eod() after bio_set_op_attrs
2020-01-17 19:48:21 +01:00
namei.c
namei: only return -ECHILD from follow_dotdot_rcu()
2020-03-05 16:43:48 +01:00
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
cifs_atomic_open(): fix double-put on late allocation failure
2020-03-18 07:17:51 +01:00
pipe.c
…
pnode.c
propagate_one(): mnt_set_mountpoint() needs mount_lock
2020-05-02 08:48:44 +02:00
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
fs: allow deduplication of eof block into the end of the destination file
2020-02-11 04:35:23 -08:00
readdir.c
readdir: be more conservative with directory entry names
2020-01-29 16:45:31 +01:00
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
splice: only read in as much information as there is pipe buffer space
2019-12-17 19:56:52 +01:00
stack.c
…
stat.c
…
statfs.c
vfs: Fix EOVERFLOW testing in put_compat_statfs64
2019-10-03 14:21:35 -07:00
super.c
vfs: remove lockdep bogosity in __sb_start_write
2020-11-24 13:29:01 +01:00
sync.c
…
timerfd.c
…
userfaultfd.c
userfaultfd: require CAP_SYS_PTRACE for UFFD_FEATURE_EVENT_FORK
2020-01-04 19:18:32 +01:00
utimes.c
utimes: Clamp the timestamps in notify_change()
2020-02-11 04:35:12 -08:00
xattr.c
xattr: break delegations in {set,remove}xattr
2020-08-11 15:33:39 +02:00