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Theodore Ts'o a16d6068bc ext4: add more paranoia checking in ext4_expand_extra_isize handling 
commit 4ea99936a1630f51fc3a2d61a58ec4a1c4b7d55a upstream.

It's possible to specify a non-zero s_want_extra_isize via debugging
option, and this can cause bad things(tm) to happen when using a file
system with an inode size of 128 bytes.

Add better checking when the file system is mounted, as well as when
we are actually doing the trying to do the inode expansion.

Link: https://lore.kernel.org/r/20191110121510.GH23325@mit.edu
Reported-by: syzbot+f8d6f8386ceacdbfff57@syzkaller.appspotmail.com
Reported-by: syzbot+33d7ea72e47de3bdf4e1@syzkaller.appspotmail.com
Reported-by: syzbot+44b6763edfc17144296f@syzkaller.appspotmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
[bwh: Backported to 3.16:
 - Use EIO instead of EFSCORRUPTED
 - Adjust context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
CVE-2019-19767
Signed-off-by: Kevin F. Haggerty <haggertk@lineageos.org>
Change-Id: I0eaa4612f0c3c11951128c8a5fb1536bd6e0f12b
2020-08-08 16:41:45 +02:00
..
9p
BACKPORT: posix_acl: Clear SGID bit when setting file permissions
2019-08-06 12:23:27 +02:00
adfs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
affs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
afs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
autofs4
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
befs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
bfs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
btrfs
BACKPORT: posix_acl: Clear SGID bit when setting file permissions
2019-08-06 12:23:27 +02:00
cachefiles
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
ceph
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
cifs
Merge remote-tracking branch 'google-common/deprecated/android-3.4' into lineage-16.0
2019-08-06 11:41:21 +02:00
coda
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
configfs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
cramfs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
crypto
fscrypt: remove broken support for detecting keyring key revocation
2019-08-06 12:26:38 +02:00
debugfs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
devpts
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
dlm
Merge tag 'dlm-fixes-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/linux-dlm
2012-04-23 18:22:42 -07:00
ecryptfs
ecryptfs: don't allow mmap when the lower fs doesn't support it
2019-08-06 11:48:23 +02:00
efs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
exfat
fs: exfat: Allow disabling exfat
2019-08-08 15:28:40 +02:00
exofs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
exportfs
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
ext2
BACKPORT: posix_acl: Clear SGID bit when setting file permissions
2019-08-06 12:23:27 +02:00
ext3
BACKPORT: posix_acl: Clear SGID bit when setting file permissions
2019-08-06 12:23:27 +02:00
ext4
ext4: add more paranoia checking in ext4_expand_extra_isize handling
2020-08-08 16:41:45 +02:00
f2fs
f2fs: fix to do sanity check with cp_pack_start_sum
2020-03-07 14:01:44 +01:00
fat
misc: fix some GCC warnings
2019-08-23 13:20:00 +02:00
freevxfs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
fscache
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
fuse
ANDROID: fuse: Add null terminator to path in canonical path to avoid issue
2019-08-08 16:33:28 +02:00
gfs2
BACKPORT: posix_acl: Clear SGID bit when setting file permissions
2019-08-06 12:23:27 +02:00
hfs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
hfsplus
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
hostfs
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
hpfs
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
hppfs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
hugetlbfs
mm: larger stack guard gap, between vmas
2019-08-06 12:26:29 +02:00
isofs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
jbd
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
jbd2
jbd2: don't mark block as modified if the handle is out of credits
2019-08-09 11:42:07 +02:00
jffs2
BACKPORT: posix_acl: Clear SGID bit when setting file permissions
2019-08-06 12:23:27 +02:00
jfs
BACKPORT: posix_acl: Clear SGID bit when setting file permissions
2019-08-06 12:23:27 +02:00
lockd
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
logfs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
minix
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
ncpfs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
nfs
Merge remote-tracking branch 'google-common/deprecated/android-3.4' into lineage-16.0
2019-08-06 11:41:21 +02:00
nfs_common
…
nfsd
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
nilfs2
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
nls
…
notify
vfs: Add permission2 for filesystems with per mount permissions
2019-08-06 10:44:34 +02:00
ntfs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
ocfs2
BACKPORT: posix_acl: Clear SGID bit when setting file permissions
2019-08-06 12:23:27 +02:00
omfs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
openpromfs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
proc
proc: Export androidboot.mode=charger if needed
2019-10-12 17:00:56 +02:00
pstore
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
qnx4
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
qnx6
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
quota
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
ramfs
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
reiserfs
BACKPORT: posix_acl: Clear SGID bit when setting file permissions
2019-08-06 12:23:27 +02:00
romfs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
scfs
misc: Import SM-G900H kernel source code
2019-08-02 15:14:10 +02:00
sdcardfs
fs: sdcardfs: Add missing option to show_options
2019-08-09 12:03:31 +02:00
sdfat
fs: sdfat: Update to version 2.3.0
2020-03-07 14:01:45 +01:00
squashfs
Merge tag 'squashfs-updates' of git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-next
2012-03-28 18:05:54 -07:00
sysfs
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
sysv
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
ubifs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
udf
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
ufs
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
xfs
BACKPORT: posix_acl: Clear SGID bit when setting file permissions
2019-08-06 12:23:27 +02:00
yaffs2
fs: yaffs2: Add null pointer check before dereferencing inode
2012-06-29 14:01:23 +05:30
aio.c
BACKPORT: aio: mark AIO pseudo-fs noexec
2019-08-06 11:48:19 +02:00
anon_inodes.c
…
attr.c
vfs: Add setattr2 for filesystems with per mount permissions
2019-08-06 10:44:35 +02:00
bad_inode.c
…
binfmt_aout.c
VM: add "vm_mmap()" helper function
2012-04-20 17:29:13 -07:00
binfmt_elf_fdpic.c
VM: add "vm_mmap()" helper function
2012-04-20 17:29:13 -07:00
binfmt_elf.c
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
binfmt_em86.c
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
binfmt_flat.c
VM: add "vm_mmap()" helper function
2012-04-20 17:29:13 -07:00
binfmt_misc.c
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
binfmt_script.c
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
binfmt_som.c
VM: add "vm_mmap()" helper function
2012-04-20 17:29:13 -07:00
bio-integrity.c
…
bio.c
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
block_dev.c
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
buffer.c
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
char_dev.c
…
compat_binfmt_elf.c
…
compat_ioctl.c
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
compat.c
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
dcache.c
constify d_lookup() arguments
2019-08-06 10:44:47 +02:00
dcookies.c
…
direct-io.c
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
drop_caches.c
misc: Import SM-G900H kernel source code
2019-08-02 15:14:10 +02:00
eventfd.c
…
eventpoll.c
PM: Rename CAP_EPOLLWAKEUP to CAP_BLOCK_SUSPEND
2019-08-08 15:09:54 +02:00
exec.c
exec: Limit arg stack to at most 75% of _STK_LIM
2019-08-09 11:42:02 +02:00
fcntl.c
misc: Import SM-G900H kernel source code
2019-08-02 15:14:10 +02:00
fhandle.c
vfs: read file_handle only once in handle_to_path
2015-07-21 01:37:10 -07:00
fifo.c
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
file_table.c
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
file.c
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
filesystems.c
fs: Limit sys_mount to only request filesystem modules.
2019-08-06 10:44:59 +02:00
fs_struct.c
sdcardfs: override umask on mkdir and create
2019-08-06 10:44:26 +02:00
fs-writeback.c
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
generic_acl.c
BACKPORT: posix_acl: Clear SGID bit when setting file permissions
2019-08-06 12:23:27 +02:00
inode.c
Fix up non-directory creation in SGID directories
2019-08-09 11:48:10 +02:00
internal.h
vfs: Allow filesystems to access their private mount data
2019-08-06 10:44:34 +02:00
ioctl.c
…
ioprio.c
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
Kconfig
fs: Add sdfat
2019-08-08 15:28:39 +02:00
Kconfig.binfmt
…
libfs.c
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
locks.c
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
Makefile
fs: Add sdfat
2019-08-08 15:28:39 +02:00
mbcache.c
…
mount.h
Merge remote-tracking branch 'google-common/deprecated/android-3.4' into lineage-16.0
2019-08-06 11:41:21 +02:00
mpage.c
…
namei.c
ANDROID: vfs: Missed updating truncate to truncate2
2019-08-06 10:44:40 +02:00
namespace.c
ANDROID: mnt: Fix freeing of mount data
2019-08-08 12:19:53 +02:00
no-block.c
…
open.c
splice: introduce FMODE_SPLICE_READ and FMODE_SPLICE_WRITE
2019-08-06 12:24:24 +02:00
pipe.c
Revert "pipe: iovec: Fix memory corruption when retrying atomic copy as non-atomic"
2019-10-05 13:41:29 +02:00
pnode.c
ANDROID: mnt: Fix next_descendent
2019-08-06 10:45:24 +02:00
pnode.h
Merge remote-tracking branch 'google-common/deprecated/android-3.4' into lineage-16.0
2019-08-06 11:41:21 +02:00
posix_acl.c
BACKPORT: posix_acl: Clear SGID bit when setting file permissions
2019-08-06 12:23:27 +02:00
proc_namespace.c
vfs: Allow filesystems to access their private mount data
2019-08-06 10:44:34 +02:00
read_write.c
…
read_write.h
…
readdir.c
kernel: Only expose su when daemon is running
2019-08-05 09:12:33 +02:00
select.c
Merge remote-tracking branch 'google-common/deprecated/android-3.4' into lineage-16.0
2019-08-06 11:41:21 +02:00
seq_file.c
misc: Import SM-G900H kernel source code
2019-08-02 15:14:10 +02:00
signalfd.c
…
splice.c
splice: introduce FMODE_SPLICE_READ and FMODE_SPLICE_WRITE
2019-08-06 12:24:24 +02:00
stack.c
…
stat.c
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
statfs.c
Merge tag 'v3.4.113' into lineage-16.0
2019-08-05 14:20:47 +02:00
super.c
vfs: Allow filesystems to access their private mount data
2019-08-06 10:44:34 +02:00
sync.c
…
timerfd.c
timerfd: add alarm timers
2019-08-06 12:31:34 +02:00
utimes.c
vfs: Add setattr2 for filesystems with per mount permissions
2019-08-06 10:44:35 +02:00
xattr_acl.c
…
xattr.c
ANDROID: xattr: Pass EOPNOTSUPP to permission2
2019-08-08 15:28:36 +02:00