kernel_optimize_test/fs/f2fs
Jaegeuk Kim 6332cd32c8 f2fs: check entire encrypted bigname when finding a dentry
If user has no key under an encrypted dir, fscrypt gives digested dentries.
Previously, when looking up a dentry, f2fs only checks its hash value with
first 4 bytes of the digested dentry, which didn't handle hash collisions fully.
This patch enhances to check entire dentry bytes likewise ext4.

Eric reported how to reproduce this issue by:

 # seq -f "edir/abcdefghijklmnopqrstuvwxyz012345%.0f" 100000 | xargs touch
 # find edir -type f | xargs stat -c %i | sort | uniq | wc -l
100000
 # sync
 # echo 3 > /proc/sys/vm/drop_caches
 # keyctl new_session
 # find edir -type f | xargs stat -c %i | sort | uniq | wc -l
99999

Cc: <stable@vger.kernel.org>
Reported-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
(fixed f2fs_dentry_hash() to work even when the hash is 0)
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
2017-05-04 11:44:35 -04:00
..
acl.c f2fs: keep dirty inodes selectively for checkpoint 2016-11-23 12:11:08 -08:00
acl.h f2fs: remove dead code f2fs_check_acl 2016-09-14 16:52:36 -07:00
checkpoint.c f2fs: new helper cur_cp_crc() getting crc in f2fs_checkpoint 2017-02-27 10:07:47 -08:00
data.c sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h> 2017-03-02 08:42:32 +01:00
debug.c f2fs: skip scanning free nid bitmap of full NAT blocks 2017-03-20 10:00:17 -04:00
dir.c f2fs: check entire encrypted bigname when finding a dentry 2017-05-04 11:44:35 -04:00
extent_cache.c f2fs: kill __is_extent_same 2017-02-27 10:07:43 -08:00
f2fs.h f2fs: check entire encrypted bigname when finding a dentry 2017-05-04 11:44:35 -04:00
file.c statx: Add a system call to make enhanced file info available 2017-03-02 20:51:15 -05:00
gc.c f2fs: fix a plint compile warning 2017-02-27 10:51:21 -08:00
gc.h f2fs: detect idle time depending on user behavior 2016-01-11 15:56:37 -08:00
hash.c f2fs: check entire encrypted bigname when finding a dentry 2017-05-04 11:44:35 -04:00
inline.c f2fs: check entire encrypted bigname when finding a dentry 2017-05-04 11:44:35 -04:00
inode.c f2fs: show simple call stack in fault injection message 2017-02-27 09:59:55 -08:00
Kconfig f2fs: add mount option to select fault injection ratio 2016-05-07 10:32:22 -07:00
Makefile fs crypto: move per-file encryption from f2fs tree to fs/crypto 2016-03-17 21:19:33 -07:00
namei.c f2fs: sync f2fs_lookup() with ext4_lookup() 2017-05-04 11:44:34 -04:00
node.c f2fs: combine nat_bits and free_nid_bitmap cache 2017-03-20 10:00:18 -04:00
node.h f2fs: new helper cur_cp_crc() getting crc in f2fs_checkpoint 2017-02-27 10:07:47 -08:00
recovery.c f2fs: change recovery policy of xattr node block 2017-02-23 10:10:52 -08:00
segment.c f2fs: don't overwrite node block by SSR 2017-03-20 10:00:14 -04:00
segment.h f2fs: update the comment of default nr_pages to skipping 2017-02-27 10:07:46 -08:00
shrinker.c f2fs: avoid casted negative value as shrink count 2016-11-23 12:11:03 -08:00
super.c for-f2fs-4.11 2017-03-01 15:55:04 -08:00
trace.c f2fs: use bio op accessors 2016-06-07 13:41:38 -06:00
trace.h f2fs: add sbi and page pointer in f2fs_io_info 2015-05-28 15:41:32 -07:00
xattr.c f2fs: drop the duplicate pval in f2fs_getxattr 2017-02-27 10:07:45 -08:00
xattr.h f2fs: enhance lookup xattr 2017-02-22 20:24:51 -08:00