commit 1ef6ea0efe upstream.
When running in a dax mode, if the user maps a page with MAP_PRIVATE and
PROT_WRITE, the ext2 filesystem would incorrectly update ctime and mtime
when the user hits a COW fault.
This breaks building of the Linux kernel. How to reproduce:
1. extract the Linux kernel tree on dax-mounted ext2 filesystem
2. run make clean
3. run make -j12
4. run make -j12
at step 4, make would incorrectly rebuild the whole kernel (although it
was already built in step 3).
The reason for the breakage is that almost all object files depend on
objtool. When we run objtool, it takes COW page fault on its .data
section, and these faults will incorrectly update the timestamp of the
objtool binary. The updated timestamp causes make to rebuild the whole
tree.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
commit bc2fbaa4d3 upstream.
sbi->s_freeinodes_counter is only decreased by the ext2 code, it is never
increased. This patch fixes it.
Note that sbi->s_freeinodes_counter is only used in the algorithm that
tries to find the group for new allocations, so this bug is not easily
visible (the only visibility is that the group finding algorithm selects
inoptinal result).
Link: https://lore.kernel.org/r/alpine.LRH.2.02.2004201538300.19436@file01.intranet.prod.int.rdu2.redhat.com
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[ Upstream commit 32302085a8 ]
Fix a debug-only build error in ext2/xattr.c:
When building without extra debugging, (and with another patch that uses
no_printk() instead of <empty> for the ext2-xattr debug-print macros,
this build error happens:
../fs/ext2/xattr.c: In function ‘ext2_xattr_cache_insert’:
../fs/ext2/xattr.c:869:18: error: ‘ext2_xattr_cache’ undeclared (first use in
this function); did you mean ‘ext2_xattr_list’?
atomic_read(&ext2_xattr_cache->c_entry_count));
Fix the problem by removing cached entry count from the debug message
since otherwise we'd have to export the mbcache structure just for that.
Fixes: be0726d33c ("ext2: convert to mbcache2")
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
[ Upstream commit 44a52022e7 ]
When EXT2_ATTR_DEBUG is not defined, modify the 2 debug macros
to use the no_printk() macro instead of <nothing>.
This fixes gcc warnings when -Wextra is used:
../fs/ext2/xattr.c:252:42: warning: suggest braces around empty body in an ‘if’ statement [-Wempty-body]
../fs/ext2/xattr.c:258:42: warning: suggest braces around empty body in an ‘if’ statement [-Wempty-body]
../fs/ext2/xattr.c:330:42: warning: suggest braces around empty body in an ‘if’ statement [-Wempty-body]
../fs/ext2/xattr.c:872:45: warning: suggest braces around empty body in an ‘else’ statement [-Wempty-body]
I have verified that the only object code change (with gcc 7.5.0) is
the reversal of some instructions from 'cmp a,b' to 'cmp b,a'.
Link: https://lore.kernel.org/r/e18a7395-61fb-2093-18e8-ed4f8cf56248@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jan Kara <jack@suse.com>
Cc: linux-ext4@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
commit d9e9866803 upstream.
Clang warns:
../fs/ext2/super.c:1076:3: warning: misleading indentation; statement is
not part of the previous 'if' [-Wmisleading-indentation]
sbi->s_groups_count = ((le32_to_cpu(es->s_blocks_count) -
^
../fs/ext2/super.c:1074:2: note: previous statement is here
if (EXT2_BLOCKS_PER_GROUP(sb) == 0)
^
1 warning generated.
This warning occurs because there is a space before the tab on this
line. Remove it so that the indentation is consistent with the Linux
kernel coding style and clang no longer warns.
Fixes: 41f04d852e ("[PATCH] ext2: fix mounts at 16T")
Link: https://github.com/ClangBuiltLinux/linux/issues/827
Link: https://lore.kernel.org/r/20191218031930.31393-1-natechancellor@gmail.com
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'for_v5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull ext2, quota, udf fixes and cleanups from Jan Kara:
- two small quota fixes (in grace time handling and possible missed
accounting of preallocated blocks beyond EOF).
- some ext2 cleanups
- udf fixes for better compatibility with Windows 10 generated media
(named streams, write-protection using domain-identifier, placement
of volume recognition sequence)
- some udf cleanups
* tag 'for_v5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
quota: fix wrong condition in is_quota_modification()
fs-udf: Delete an unnecessary check before brelse()
ext2: Delete an unnecessary check before brelse()
udf: Drop forward function declarations
udf: Verify domain identifier fields
udf: augment UDF permissions on new inodes
udf: Use dynamic debug infrastructure
udf: reduce leakage of blocks related to named streams
udf: prevent allocation beyond UDF partition
quota: fix condition for resetting time limit in do_set_dqblk()
ext2: code cleanup for ext2_free_blocks()
ext2: fix block range in ext2_data_block_valid()
udf: support 2048-byte spacing of VRS descriptors on 4K media
udf: refactor VRS descriptor identification
The brelse() function tests whether its argument is NULL
and then returns immediately.
Thus the test around the call is not needed.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Link: https://lore.kernel.org/r/51dea296-2207-ebc0-bac3-13f3e5c3b235@web.de
Signed-off-by: Jan Kara <jack@suse.cz>
For block validity we should check the block range
from start_block to start_block + count - 1, so fix
the range in ext2_data_block_valid() and also modify
the count argument properly in calling place.
Signed-off-by: Chengguang Xu <cgxu519@zoho.com.cn>
Link: https://lore.kernel.org/r/20190723112155.20329-1-cgxu519@zoho.com.cn
Signed-off-by: Jan Kara <jack@suse.cz>
- Standardize parameter checking for the SETFLAGS and FSSETXATTR ioctls
(which were the file attribute setters for ext4 and xfs and have now
been hoisted to the vfs)
- Only allow the DAX flag to be set on files and directories.
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Merge tag 'vfs-fix-ioctl-checking-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull common SETFLAGS/FSSETXATTR parameter checking from Darrick Wong:
"Here's a patch series that sets up common parameter checking functions
for the FS_IOC_SETFLAGS and FS_IOC_FSSETXATTR ioctl implementations.
The goal here is to reduce the amount of behaviorial variance between
the filesystems where those ioctls originated (ext2 and XFS,
respectively) and everybody else.
- Standardize parameter checking for the SETFLAGS and FSSETXATTR
ioctls (which were the file attribute setters for ext4 and xfs and
have now been hoisted to the vfs)
- Only allow the DAX flag to be set on files and directories"
* tag 'vfs-fix-ioctl-checking-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
vfs: only allow FSSETXATTR to set DAX flag on files and dirs
vfs: teach vfs_ioc_fssetxattr_check to check extent size hints
vfs: teach vfs_ioc_fssetxattr_check to check project id info
vfs: create a generic checking function for FS_IOC_FSSETXATTR
vfs: create a generic checking and prep function for FS_IOC_SETFLAGS
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Merge tag 'for_v5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull ext2, udf and quota updates from Jan Kara:
- some ext2 fixes and cleanups
- a fix of udf bug when extending files
- a fix of quota Q_XGETQSTAT[V] handling
* tag 'for_v5.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
udf: Fix incorrect final NOT_ALLOCATED (hole) extent length
ext2: Use kmemdup rather than duplicating its implementation
quota: honor quota type in Q_XGETQSTAT[V] calls
ext2: Always brelse bh on failure in ext2_iget()
ext2: add missing brelse() in ext2_iget()
ext2: Fix a typo in ext2_getattr argument
ext2: fix a typo in comment
ext2: add missing brelse() in ext2_new_inode()
ext2: optimize ext2_xattr_get()
ext2: introduce new helper for xattr entry comparison
ext2: merge xattr next entry check to ext2_xattr_entry_valid()
ext2: code cleanup for ext2_preread_inode()
ext2: code cleanup by using test_opt() and clear_opt()
doc: ext2: update description of quota options for ext2
ext2: Strengthen xattr block checks
ext2: Merge loops in ext2_xattr_set()
ext2: introduce helper for xattr entry validation
ext2: introduce helper for xattr header validation
quota: add dqi_dirty_list description to comment of Dquot List Management
kmemdup is introduced to duplicate a region of memory in a neat way.
Rather than kmalloc/kzalloc + memset, which the programmer needs to
write the size twice (sometimes lead to mistakes), kmemdup improves
readability, leads to smaller code and also reduce the chances of mistakes.
Suggestion to use kmemdup rather than using kmalloc/kzalloc + memset.
Signed-off-by: Fuqian Huang <huangfq.daxian@gmail.com>
Link: https://lore.kernel.org/r/20190703131727.25735-1-huangfq.daxian@gmail.com
Signed-off-by: Jan Kara <jack@suse.cz>
Create a generic function to check incoming FS_IOC_SETFLAGS flag values
and later prepare the inode for updates so that we can standardize the
implementations that follow ext4's flag values.
Note that the efivarfs implementation no longer fails a no-op SETFLAGS
without CAP_LINUX_IMMUTABLE since that's the behavior in ext*.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: David Sterba <dsterba@suse.com>
Reviewed-by: Bob Peterson <rpeterso@redhat.com>
All but one bail out paths in ext2_iget() is releasing bh. Move the
releasing of bh into a common error handling code.
Signed-off-by: Jan Kara <jack@suse.cz>
Add missing brelse() on error path of ext2_iget().
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Chengguang Xu <cgxu519@zoho.com.cn>
Signed-off-by: Jan Kara <jack@suse.cz>
Just fix a typo in comment and remove redundant blank line
in ext2_data_block_valid().
Signed-off-by: Chengguang Xu <cgxu519@zoho.com.cn>
Signed-off-by: Jan Kara <jack@suse.cz>
There is a missing brelse of bitmap_bh in an error
path of ext2_new_inode().
Signed-off-by: Chengguang Xu <cgxu519@zoho.com.cn>
Signed-off-by: Jan Kara <jack@suse.cz>
Since xattr entry names are sorted, we don't have
to continue when current entry name is greater than
target.
Signed-off-by: Chengguang Xu <cgxu519@zoho.com.cn>
Signed-off-by: Jan Kara <jack@suse.cz>
Introduce new helper ext2_xattr_cmp_entry() for xattr
entry comparison.
Signed-off-by: Chengguang Xu <cgxu519@zoho.com.cn>
Signed-off-by: Jan Kara <jack@suse.cz>
We have introduced ext2_xattr_entry_valid() for xattr
entry sanity check, so it's better to do relevant things
in one place.
Signed-off-by: Chengguang Xu <cgxu519@zoho.com.cn>
Signed-off-by: Jan Kara <jack@suse.cz>
Calling bdi_rw_congested() instead of calling
bdi_read_congested() and bdi_write_congested().
Signed-off-by: Chengguang Xu <cgxu519@zoho.com.cn>
Signed-off-by: Jan Kara <jack@suse.cz>
Add SPDX license identifiers to all Make/Kconfig files which:
- Have no license information of any form
These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:
GPL-2.0-only
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add SPDX license identifiers to all files which:
- Have no license information of any form
- Have MODULE_LICENCE("GPL*") inside which was used in the initial
scan/conversion to ignore the file
These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:
GPL-2.0-only
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Using test_opt() and clear_opt() instead of directly
comparing flag bit of mount option.
Signed-off-by: Chengguang Xu <cgxu519@zoho.com.cn>
Signed-off-by: Jan Kara <jack@suse.cz>
Check every entry in xattr block for validity in ext2_xattr_set() to
detect on disk corruption early. Also since e_value_block field in xattr
entry is never != 0 in a valid filesystem, just remove checks for it
once we have established entries are valid.
Reviewed-by: Chengguang Xu <cgxu519@zoho.com.cn>
Signed-off-by: Jan Kara <jack@suse.cz>
There are two very similar loops when searching xattr to set. Just merge
them.
Reviewed-by: Chengguang Xu <cgxu519@zoho.com.cn>
Signed-off-by: Jan Kara <jack@suse.cz>
Introduce helper function ext2_xattr_entry_valid()
for xattr entry validation and clean up the entry
check related code.
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Chengguang Xu <cgxu519@zoho.com.cn>
Signed-off-by: Jan Kara <jack@suse.cz>
Introduce helper function ext2_xattr_header_valid()
for xattr header validation and clean up the header
check ralated code.
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Chengguang Xu <cgxu519@zoho.com.cn>
Signed-off-by: Jan Kara <jack@suse.cz>
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Merge tag 'fs_for_v5.2-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull misc filesystem updates from Jan Kara:
"A couple of small bugfixes and cleanups for quota, udf, ext2, and
reiserfs"
* tag 'fs_for_v5.2-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
quota: check time limit when back out space/inode change
fs/quota: erase unused but set variable warning
quota: fix wrong indentation
udf: fix an uninitialized read bug and remove dead code
fs/reiserfs/journal.c: Make remove_journal_hash static
quota: remove trailing whitespaces
quota: code cleanup for __dquot_alloc_space()
ext2: Adjust the comment of function ext2_alloc_branch
udf: Explain handling of load_nls() failure
The name of argument is error in the header comment.
@num should be @indirect_blks.
At the same time, there was a lack of description of the two parameters
@blks and @goal.
This commit therefore fixes this header comment.
Signed-off-by: Shuning Zhang <sunny.s.zhang@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
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Merge tag 'fs_for_v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull ext2 and udf fixes from Jan Kara:
"A couple of fixes for udf and ext2. Namely:
- fix making ext2 mountable (again) with 64k blocksize
- fix for ext2 statx(2) handling
- fix for udf handling of corrupted filesystem so that it doesn't get
corrupted even further
- couple smaller ext2 and udf cleanups"
* tag 'fs_for_v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
udf: Drop pointless check from udf_sync_fs()
ext2: support statx syscall
udf: disallow RW mount without valid integrity descriptor
udf: finalize integrity descriptor before writeback
udf: factor out LVID finalization for reuse
ext2: Fix underflow in ext2_max_size()
ext2: Fix a typo in comment
ext2: Remove redundant check for finding no group
ext2: Annotate implicit fall through in __ext2_truncate_blocks
ext2: Set superblock revision when enabling xattr feature
ext2: Remove redundant check on s_inode_size
ext2: set proper return code
Since statx, every filesystem should fill the attributes/attributes_mask
in routine getattr. But the generic_fillattr has not fill that, so add
ext2_getattr to do this. This can fix generic/424 while testing ext2.
Reviewed-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: yangerkun <yangerkun@huawei.com>
Signed-off-by: Jan Kara <jack@suse.cz>
When ext2 filesystem is created with 64k block size, ext2_max_size()
will return value less than 0. Also, we cannot write any file in this fs
since the sb->maxbytes is less than 0. The core of the problem is that
the size of block index tree for such large block size is more than
i_blocks can carry. So fix the computation to count with this
possibility.
File size limits computed with the new function for the full range of
possible block sizes look like:
bits file_size
10 17247252480
11 275415851008
12 2196873666560
13 2197948973056
14 2198486220800
15 2198754754560
16 2198888906752
CC: stable@vger.kernel.org
Reported-by: yangerkun <yangerkun@huawei.com>
Signed-off-by: Jan Kara <jack@suse.cz>
When best_desc keeps NULL, best_group keeps -1, too. So we can
return best_group directly.
Signed-off-by: Liu Xiang <liu.xiang6@zte.com.cn>
Signed-off-by: Jan Kara <jack@suse.cz>
There is a plan to build the kernel with -Wimplicit-fallthrough and
these places in the code produced warnings (W=1).
This commit removes the following warnings:
fs/ext2/inode.c:1237:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
fs/ext2/inode.c:1244:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
Signed-off-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Jan Kara <jack@suse.cz>
When setting the first xattr, we automatically enable
EXT2_FEATURE_COMPAT_EXT_ATTR. However we forget to call
ext2_update_dynamic_rev() so in theory if the filesystem was created as
ancient one without features support, this could be missed. The
consequences are minor anyway - since the feature is compat one, only
old e2fsck which does not understand xattrs could do something bad.
Reported-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Jan Kara <jack@suse.cz>
The case of (EXT2_INODE_SIZE(sb) == 0) is included in
(sbi->s_inode_size < EXT2_GOOD_OLD_INODE_SIZE).
So there is no need to check again.
Signed-off-by: Liu Xiang <liu.xiang6@zte.com.cn>
Signed-off-by: Jan Kara <jack@suse.cz>
Set proper return code when failing from allocating
memory in ext2_fill_super().
Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Deduplicate the ext2 file type conversion implementation and remove
EXT2_FT_* definitions - file systems that use the same file types as
defined by POSIX do not need to define their own versions and can
use the common helper functions decared in fs_types.h and implemented
in fs_types.c
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Signed-off-by: Jan Kara <jack@suse.cz>
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Merge tag 'fs_for_4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull ext2, udf, and quota update from Jan Kara:
"Some ext2 cleanups, a fix for UDF crash on corrupted media, and one
quota locking fix"
* tag 'fs_for_4.21-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
quota: Lock s_umount in exclusive mode for Q_XQUOTA{ON,OFF} quotactls.
udf: Fix BUG on corrupted inode
ext2: change reusable parameter to true when calling mb_cache_entry_create()
ext2: remove redundant condition check
ext2: avoid unnecessary operation in ext2_error()
The function ext2_xattr_set calls brelse(bh) to drop the reference count
of bh. After that, bh may be freed. However, following brelse(bh),
it reads bh->b_data via macro HDR(bh). This may result in a
use-after-free bug. This patch moves brelse(bh) after reading field.
CC: stable@vger.kernel.org
Signed-off-by: Pan Bian <bianpan2016@163.com>
Signed-off-by: Jan Kara <jack@suse.cz>
We need to initialize opts.s_mount_opt as zero before using it, else we
may get some unexpected mount options.
Fixes: 088519572c ("ext2: Parse mount options into a dedicated structure")
CC: stable@vger.kernel.org
Signed-off-by: xingaopeng <xingaopeng@huawei.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Reusable parameter of mb_cache_entry_create() is bool type,
so it's better to set true instead of 1.
Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Signed-off-by: Jan Kara <jack@suse.cz>
ext2_xattr_destroy_cache() can handle NULL pointer correctly,
so there is no need to check NULL pointer before calling
ext2_xattr_destroy_cache().
Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Signed-off-by: Jan Kara <jack@suse.cz>
If filesystem has already mounted as read-only, then we don't have
to do it again.
Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Mikulas Patocka