Eric Biggers bf63b9d429 fscrypto: require write access to mount to set encryption policy ... commit ba63f23d69a3a10e7e527a02702023da68ef8a6d upstream. 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> Cc: stable@vger.kernel.org # 4.1+; check fs/{ext4,f2fs} 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>		2016-09-24 10:07:35 +02:00
..
acl.c	ext4: remove unused header files	2015-04-02 23:47:42 -04:00
acl.h	ext2/3/4: use generic posix ACL infrastructure	2014-01-25 23:58:19 -05:00
balloc.c	ext4: validate s_reserved_gdt_blocks on mount	2016-08-16 09:30:51 +02:00
bitmap.c	ext4: remove unused header files	2015-04-02 23:47:42 -04:00
block_validity.c	ext4: call out CRC and corruption errors with specific error codes	2015-10-17 16:16:04 -04:00
crypto.c	ext4: fix an endianness bug in ext4_encrypted_zeroout()	2015-11-26 15:20:19 -05:00
crypto_fname.c	ext4 crypto: replace some BUG_ON()'s with error checks	2015-10-03 10:49:27 -04:00
crypto_key.c	ext4 crypto: add missing locking for keyring_key access	2016-02-17 12:31:02 -08:00
crypto_policy.c	fscrypto: add authorization check for setting encryption policy	2016-09-24 10:07:34 +02:00
dir.c	ext4: clean up feature test macros with predicate functions	2015-10-17 16:18:43 -04:00
ext4.h	ext4: fix races of writeback with punch hole and zero range	2016-05-04 14:48:53 -07:00
ext4_crypto.h	ext4 crypto: allocate bounce pages using GFP_NOWAIT	2015-06-03 09:32:39 -04:00
ext4_extents.h	ext4: teach ext4_ext_find_extent() to realloc path if necessary	2014-09-01 14:40:09 -04:00
ext4_jbd2.c	ext4: fix potential use after free in __ext4_journal_stop	2015-10-17 22:57:06 -04:00
ext4_jbd2.h	ext4: clean up feature test macros with predicate functions	2015-10-17 16:18:43 -04:00
extents.c	ext4: check for extents that wrap around	2016-08-16 09:30:51 +02:00
extents_status.c	ext4: move procfs registration code to fs/ext4/sysfs.c	2015-09-23 12:46:17 -04:00
extents_status.h	ext4: move procfs registration code to fs/ext4/sysfs.c	2015-09-23 12:46:17 -04:00
file.c	ext4: fix races between page faults and hole punching	2016-05-04 14:48:53 -07:00
fsync.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2015-04-26 17:22:07 -07:00
hash.c	ext4: remove unused header files	2015-04-02 23:47:42 -04:00
ialloc.c	ext4: clean up error handling when orphan list is corrupted	2016-06-07 18:14:37 -07:00
indirect.c	ext4: clean up feature test macros with predicate functions	2015-10-17 16:18:43 -04:00
inline.c	ext4: clean up feature test macros with predicate functions	2015-10-17 16:18:43 -04:00
inode.c	ext4: avoid modifying checksum fields directly during checksum verification	2016-09-15 08:27:51 +02:00
ioctl.c	fscrypto: require write access to mount to set encryption policy	2016-09-24 10:07:35 +02:00
Kconfig	ext4: Update EXT4_USE_FOR_EXT2 description	2015-09-24 13:27:47 +02:00
Makefile	ext4: move sysfs code from super.c to fs/ext4/sysfs.c	2015-09-23 12:44:17 -04:00
mballoc.c	ext4: use __GFP_NOFAIL in ext4_free_blocks()	2016-09-24 10:07:34 +02:00
mballoc.h	ext4: remove unused ac_ex_scanned	2014-02-20 13:32:10 -05:00
migrate.c	ext4: clean up feature test macros with predicate functions	2015-10-17 16:18:43 -04:00
mmp.c	ext4: call out CRC and corruption errors with specific error codes	2015-10-17 16:16:04 -04:00
move_extent.c	ext4: iterate over buffer heads correctly in move_extent_per_page()	2016-06-01 12:15:48 -07:00
namei.c	ext4: avoid modifying checksum fields directly during checksum verification	2016-09-15 08:27:51 +02:00
page-io.c	ext4 crypto: fix memory leak in ext4_bio_write_page()	2015-10-02 23:54:58 -04:00
readpage.c	Merge branch 'akpm' (patches from Andrew)	2015-11-07 14:32:45 -08:00
resize.c	ext4: fix potential integer overflow	2016-02-25 12:01:15 -08:00
super.c	ext4: avoid modifying checksum fields directly during checksum verification	2016-09-15 08:27:51 +02:00
symlink.c	ext4: fix an endianness bug in ext4_encrypted_follow_link()	2015-11-26 15:20:50 -05:00
sysfs.c	ext4: add "static" to ext4_seq_##name##_fops struct	2015-11-26 15:52:24 -05:00
truncate.h	ext4: fix races between page faults and hole punching	2016-05-04 14:48:53 -07:00
xattr.c	ext4: avoid modifying checksum fields directly during checksum verification	2016-09-15 08:27:51 +02:00
xattr.h	ext4 crypto: add encryption xattr support	2015-04-11 07:47:00 -04:00
xattr_security.c	xattr handlers: Pass handler to operations instead of flags	2015-11-13 20:34:32 -05:00
xattr_trusted.c	xattr handlers: Pass handler to operations instead of flags	2015-11-13 20:34:32 -05:00
xattr_user.c	xattr handlers: Pass handler to operations instead of flags	2015-11-13 20:34:32 -05:00