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linux-sg2042/fs/ext4
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Jan Kara fcf5ea1099 ext4: fix SEEK_HOLE/SEEK_DATA for blocksize < pagesize 
ext4_find_unwritten_pgoff() does not properly handle a situation when
starting index is in the middle of a page and blocksize < pagesize. The
following command shows the bug on filesystem with 1k blocksize:

  xfs_io -f -c "falloc 0 4k" \
            -c "pwrite 1k 1k" \
            -c "pwrite 3k 1k" \
            -c "seek -a -r 0" foo

In this example, neither lseek(fd, 1024, SEEK_HOLE) nor lseek(fd, 2048,
SEEK_DATA) will return the correct result.

Fix the problem by neglecting buffers in a page before starting offset.

Reported-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jan Kara <jack@suse.cz>
CC: stable@vger.kernel.org # 3.8+
 		2017-08-05 17:43:24 -04:00
..
Kconfig dax: fix build warnings with FS_DAX and !FS_IOMAP 2017-01-24 16:26:14 -08:00
Makefile ext4: support GETFSMAP ioctls 2017-04-30 00:36:53 -04:00
acl.c ext4: Don't clear SGID when inheriting ACLs 2017-07-30 23:33:01 -04:00
acl.h ext2/3/4: use generic posix ACL infrastructure 2014-01-25 23:58:19 -05:00
balloc.c The major change this cycle is deleting ext4's copy of the file system 2016-07-26 18:35:55 -07:00
bitmap.c ext4: remove unused header files 2015-04-02 23:47:42 -04:00
block_validity.c ext4: add missing KERN_CONT to a few more debugging uses 2016-10-15 09:57:31 -04:00
dir.c ext4: remove unused variable 2016-09-30 02:14:56 -04:00
ext4.h ext4: remove unused metadata accounting variables 2017-07-30 22:30:11 -04:00
ext4_extents.h ext4: fix misspellings in comments. 2016-03-09 23:49:05 -05:00
ext4_jbd2.c ext4: add shutdown bit and check for it 2017-02-05 01:28:48 -05:00
ext4_jbd2.h ext4: improve journal credit handling in set xattr paths 2017-06-21 22:28:40 -04:00
extents.c ext4: call journal revoke when freeing ea_inode blocks 2017-06-21 21:36:51 -04:00
extents_status.c scripts/spelling.txt: add "comsume(r)" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
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 SEEK_HOLE/SEEK_DATA for blocksize < pagesize 2017-08-05 17:43:24 -04:00
fsmap.c ext4: fix off-by-one fsmap error on 1k block filesystems 2017-06-23 00:58:57 -04:00
fsmap.h ext4: support GETFSMAP ioctls 2017-04-30 00:36:53 -04:00
fsync.c ext4: use errseq_t based error handling for reporting data writeback errors 2017-07-06 07:02:30 -04:00
hash.c ext4: move halfmd4 into hash.c directly 2017-02-02 11:52:14 -05:00
ialloc.c ext4: fix __ext4_new_inode() journal credits calculation 2017-07-06 00:01:59 -04:00
indirect.c ext4: call journal revoke when freeing ea_inode blocks 2017-06-21 21:36:51 -04:00
inline.c ext4: xattr-in-inode support 2017-06-21 21:10:32 -04:00
inode.c ext4: correct comment references to ext4_ext_direct_IO() 2017-07-30 22:26:40 -04:00
ioctl.c ext4: convert swap_inode_data() over to use swap() on most of the fields 2017-07-31 00:55:34 -04:00
mballoc.c ext4: release discard bio after sending discard commands 2017-08-05 13:11:57 -04:00
mballoc.h ext4: send parallel discards on commit completions 2017-06-22 23:54:33 -04:00
migrate.c ext4: do not set posix acls on xattr inodes 2017-06-21 21:21:39 -04:00
mmp.c block,fs: use REQ_* flags directly 2016-11-01 09:43:26 -06:00
move_extent.c ext4: add ext4_is_quota_file() 2017-06-22 11:31:25 -04:00
namei.c ext4: return EFSBADCRC if a bad checksum error is found in ext4_find_entry() 2017-06-23 00:47:05 -04:00
page-io.c ext4: add support for passing in write hints for buffered writes 2017-06-27 12:05:44 -06:00
readpage.c block: switch bios to blk_status_t 2017-06-09 09:27:32 -06:00
resize.c ext4: rename s_resize_flags to s_ext4_flags 2017-02-05 01:27:48 -05:00
super.c ext4: remove unused metadata accounting variables 2017-07-30 22:30:11 -04:00
symlink.c ext4: Add statx support 2017-04-03 01:05:58 -04:00
sysfs.c ext4: check return value of kstrtoull correctly in reserved_clusters_store 2017-06-23 01:08:22 -04:00
truncate.h ext4: fix races between page faults and hole punching 2015-12-07 14:28:03 -05:00
xattr.c ext4: error should be cleared if ea_inode isn't added to the cache 2017-07-31 00:40:22 -04:00
xattr.h ext4: fix __ext4_new_inode() journal credits calculation 2017-07-06 00:01:59 -04:00
xattr_security.c switch xattr_handler->set() to passing dentry and inode separately 2016-05-27 15:39:43 -04:00
xattr_trusted.c switch xattr_handler->set() to passing dentry and inode separately 2016-05-27 15:39:43 -04:00
xattr_user.c switch xattr_handler->set() to passing dentry and inode separately 2016-05-27 15:39:43 -04:00