Jan Kara 1f7b7e9a4b ext4: fix races between buffered IO and collapse / insert range ... commit 32ebffd3bbb4162da5ff88f9a35dd32d0a28ea70 upstream. Current code implementing FALLOC_FL_COLLAPSE_RANGE and FALLOC_FL_INSERT_RANGE is prone to races with buffered writes and page faults. If buffered write or write via mmap manages to squeeze between filemap_write_and_wait_range() and truncate_pagecache() in the fallocate implementations, the written data is simply discarded by truncate_pagecache() although it should have been shifted. Fix the problem by moving filemap_write_and_wait_range() call inside i_mutex and i_mmap_sem. That way we are protected against races with both buffered writes and page faults. Signed-off-by: Jan Kara <jack@suse.com> Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2016-05-04 14:48:53 -07:00
..
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: fix scheduling in atomic on group checksum failure	2016-02-25 12:01:14 -08:00
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	ext4 crypto: replace some BUG_ON()'s with error checks	2015-10-03 10:49:27 -04:00
dir.c	ext4: clean up feature test macros with predicate functions	2015-10-17 16:18:43 -04:00
ext4.h	ext4: fix races between page faults and hole punching	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: fix races between buffered IO and collapse / insert range	2016-05-04 14:48:53 -07:00
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: fix scheduling in atomic on group checksum failure	2016-02-25 12:01:14 -08:00
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: fix races between page faults and hole punching	2016-05-04 14:48:53 -07:00
ioctl.c	ext4: clean up feature test macros with predicate functions	2015-10-17 16:18:43 -04:00
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	remove abs64()	2015-11-09 15:11:24 -08:00
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: add lockdep annotations for i_data_sem	2016-04-20 15:42:13 +09:00
namei.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2015-11-07 13:05:44 -08:00
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: fix races between page faults and hole punching	2016-05-04 14:48:53 -07:00
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	xattr handlers: Pass handler to operations instead of flags	2015-11-13 20:34:32 -05:00
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