kernel/git/stable/linux.git/fs/ext4/inline.c, branch linux-4.17.y

ext4: fix inline data updates with checksums enabled

2018-08-03T05:48:03+00:00

commit 362eca70b53389bddf3143fe20f53dcce2cfdf61 upstream. The inline data code was updating the raw inode directly; this is problematic since if metadata checksums are enabled, ext4_mark_inode_dirty() must be called to update the inode's checksum. In addition, the jbd2 layer requires that get_write_access() be called before the metadata buffer is modified. Fix both of these problems. https://bugzilla.kernel.org/show_bug.cgi?id=200443 Signed-off-by: Theodore Ts'o Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman

ext4: avoid running out of journal credits when appending to an inline file

2018-07-11T14:31:30+00:00

commit 8bc1379b82b8e809eef77a9fedbb75c6c297be19 upstream. Use a separate journal transaction if it turns out that we need to convert an inline file to use an data block. Otherwise we could end up failing due to not having journal credits. This addresses CVE-2018-10883. https://bugzilla.kernel.org/show_bug.cgi?id=200071 Signed-off-by: Theodore Ts'o Cc: stable@kernel.org Signed-off-by: Greg Kroah-Hartman

ext4: clear i_data in ext4_inode_info when removing inline data

2018-07-11T14:31:30+00:00

commit 6e8ab72a812396996035a37e5ca4b3b99b5d214b upstream. When converting from an inode from storing the data in-line to a data block, ext4_destroy_inline_data_nolock() was only clearing the on-disk copy of the i_blocks[] array. It was not clearing copy of the i_blocks[] in ext4_inode_info, in i_data[], which is the copy actually used by ext4_map_blocks(). This didn't matter much if we are using extents, since the extents header would be invalid and thus the extents could would re-initialize the extents tree. But if we are using indirect blocks, the previous contents of the i_blocks array will be treated as block numbers, with potentially catastrophic results to the file system integrity and/or user data. This gets worse if the file system is using a 1k block size and s_first_data is zero, but even without this, the file system can get quite badly corrupted. This addresses CVE-2018-10881. https://bugzilla.kernel.org/show_bug.cgi?id=200015 Signed-off-by: Theodore Ts'o Cc: stable@kernel.org Signed-off-by: Greg Kroah-Hartman

ext4: do not allow external inodes for inline data

2018-06-25T23:51:21+00:00

commit 117166efb1ee8f13c38f9e96b258f16d4923f888 upstream. The inline data feature was implemented before we added support for external inodes for xattrs. It makes no sense to support that combination, but the problem is that there are a number of extended attribute checks that are skipped if e_value_inum is non-zero. Unfortunately, the inline data code is completely e_value_inum unaware, and attempts to interpret the xattr fields as if it were an inline xattr --- at which point, Hilarty Ensues. This addresses CVE-2018-11412. https://bugzilla.kernel.org/show_bug.cgi?id=199803 Reported-by: Jann Horn Reviewed-by: Andreas Dilger Signed-off-by: Theodore Ts'o Fixes: e50e5129f384 ("ext4: xattr-in-inode support") Cc: stable@kernel.org Signed-off-by: Greg Kroah-Hartman

Merge tag 'iversion-v4.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux

2018-02-07T22:25:22+00:00

Pull inode->i_version cleanup from Jeff Layton: "Goffredo went ahead and sent a patch to rename this function, and reverse its sense, as we discussed last week. The patch is very straightforward and I figure it's probably best to go ahead and merge this to get the API as settled as possible" * tag 'iversion-v4.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux: iversion: Rename make inode_cmp_iversion{+raw} to inode_eq_iversion{+raw}

Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

2018-02-03T21:49:22+00:00

Pull ext4 updates from Ted Ts'o: "Only miscellaneous cleanups and bug fixes for ext4 this cycle" * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext4: create ext4_kset dynamically ext4: create ext4_feat kobject dynamically ext4: release kobject/kset even when init/register fail ext4: fix incorrect indentation of if statement ext4: correct documentation for grpid mount option ext4: use 'sbi' instead of 'EXT4_SB(sb)' ext4: save error to disk in __ext4_grp_locked_error() jbd2: fix sphinx kernel-doc build warnings ext4: fix a race in the ext4 shutdown path mbcache: make sure c_entry_count is not decremented past zero ext4: no need flush workqueue before destroying it ext4: fixed alignment and minor code cleanup in ext4.h ext4: fix ENOSPC handling in DAX page fault handler dax: pass detailed error code from dax_iomap_fault() mbcache: revert "fs/mbcache.c: make count_objects() more robust" mbcache: initialize entry->e_referenced in mb_cache_entry_create() ext4: fix up remaining files with SPDX cleanups

iversion: Rename make inode_cmp_iversion{+raw} to inode_eq_iversion{+raw}

2018-02-01T13:15:25+00:00

The function inode_cmp_iversion{+raw} is counter-intuitive, because it returns true when the counters are different and false when these are equal. Rename it to inode_eq_iversion{+raw}, which will returns true when the counters are equal and false otherwise. Signed-off-by: Goffredo Baroncelli Signed-off-by: Jeff Layton

ext4: convert to new i_version API

2018-01-29T11:42:21+00:00

Signed-off-by: Jeff Layton Acked-by: Theodore Ts'o

ext4: fix up remaining files with SPDX cleanups

2017-12-18T03:00:59+00:00

A number of ext4 source files were skipped due because their copyright permission statements didn't match the expected text used by the automated conversion utilities. I've added SPDX tags for the rest. While looking at some of these files, I've noticed that we have quite a bit of variation on the licenses that were used --- in particular some of the Red Hat licenses on the jbd2 files use a GPL2+ license, and we have some files that have a LGPL-2.1 license (which was quite surprising). I've not attempted to do any license changes. Even if it is perfectly legal to relicense to GPL 2.0-only for consistency's sake, that should be done with ext4 developer community discussion. Signed-off-by: Theodore Ts'o

ext4: prevent data corruption with inline data + DAX

2017-10-12T15:52:34+00:00

If an inode has inline data it is currently prevented from using DAX by a check in ext4_set_inode_flags(). When the inode grows inline data via ext4_create_inline_data() or removes its inline data via ext4_destroy_inline_data_nolock(), the value of S_DAX can change. Currently these changes are unsafe because we don't hold off page faults and I/O, write back dirty radix tree entries and invalidate all mappings. There are also issues with mm-level races when changing the value of S_DAX, as well as issues with the VM_MIXEDMAP flag: https://www.spinics.net/lists/linux-xfs/msg09859.html The unsafe transition of S_DAX can reliably cause data corruption, as shown by the following fstest: https://patchwork.kernel.org/patch/9948381/ Fix this issue by preventing the DAX mount option from being used on filesystems that were created to support inline data. Inline data is an option given to mkfs.ext4. Signed-off-by: Ross Zwisler Signed-off-by: Theodore Ts'o Reviewed-by: Jan Kara CC: stable@vger.kernel.org