Eric Biggers 1bb1d4252d fscrypto: require write access to mount to set encryption policy ...

commit ba63f23d69 upstream.

[Please apply to 4.4-stable.  Note: this was already backported, but
only to ext4; it was missed that it should go to f2fs as well.  This is
needed to make xfstest generic/395 pass on f2fs.]

Since setting an encryption policy requires writing metadata to the
filesystem, it should be guarded by mnt_want_write/mnt_drop_write.
Otherwise, a user could cause a write to a frozen or readonly
filesystem.  This was handled correctly by f2fs but not by ext4.  Make
fscrypt_process_policy() handle it rather than relying on the filesystem
to get it right.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Acked-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2017-10-27 10:23:18 +02:00

..

acl.c

f2fs: Don't clear SGID when inheriting ACLs

2017-07-27 15:06:07 -07:00

acl.h

…

checkpoint.c

f2fs: support lower priority asynchronous readahead in ra_meta_pages

2015-10-12 14:03:15 -07:00

crypto_fname.c

f2fs crypto: replace some BUG_ON()'s with error checks

2017-10-27 10:23:18 +02:00

crypto_key.c

fscrypt: fix dereference of NULL user_key_payload

2017-10-27 10:23:18 +02:00

crypto_policy.c

fscrypt: fix context consistency check when key(s) unavailable

2017-05-25 14:30:11 +02:00

crypto.c

f2fs crypto: replace some BUG_ON()'s with error checks

2017-10-27 10:23:18 +02:00

data.c

f2fs: do not wait for writeback in write_begin

2017-10-21 17:09:05 +02:00

debug.c

f2fs: set ->owner for debugfs status file's file_operations

2017-01-06 11:16:13 +01:00

dir.c

fscrypt: avoid collisions when presenting long encrypted filenames

2017-05-25 14:30:11 +02:00

extent_cache.c

f2fs: fix to skip shrinking extent nodes

2015-10-22 09:39:35 -07:00

f2fs_crypto.h

fscrypt: remove broken support for detecting keyring key revocation

2017-03-31 09:49:54 +02:00

f2fs.h

f2fs: check entire encrypted bigname when finding a dentry

2017-05-25 14:30:11 +02:00

file.c

fscrypto: require write access to mount to set encryption policy

2017-10-27 10:23:18 +02:00

gc.c

f2fs: relocate the tracepoint for background_gc

2015-10-13 10:02:01 -07:00

gc.h

f2fs: support synchronous gc in ioctl

2015-10-09 16:20:56 -07:00

hash.c

f2fs: check entire encrypted bigname when finding a dentry

2017-05-25 14:30:11 +02:00

inline.c

f2fs: check entire encrypted bigname when finding a dentry

2017-05-25 14:30:11 +02:00

inode.c

…

Kconfig

…

Makefile

…

namei.c

fs/f2fs/namei.c: remove unnecessary new_valid_dev() check

2015-11-09 15:11:24 -08:00

node.c

f2fs: export ra_nid_pages to sysfs

2015-10-12 14:03:43 -07:00

node.h

f2fs: export ra_nid_pages to sysfs

2015-10-12 14:03:43 -07:00

recovery.c

f2fs: check hot_data for roll-forward recovery

2017-09-27 11:00:12 +02:00

segment.c

f2fs: fix to clear GCed flag for atomic written page

2015-10-22 09:37:13 -07:00

segment.h

Revert "f2fs: do not skip dentry block writes"

2015-10-12 13:38:02 -07:00

shrinker.c

…

super.c

f2fs: sanity check checkpoint segno and blkoff

2017-08-11 09:08:51 -07:00

trace.c

…

trace.h

…

xattr.c

f2fs: xattr simplifications

2015-11-13 20:34:34 -05:00

xattr.h

…