summaryrefslogtreecommitdiffstats
path: root/fs/ext2
AgeCommit message (Collapse)AuthorFilesLines
2019-11-07ext2: code cleanup for ext2_try_to_allocate()Chengguang Xu1-19/+10
Code cleanup by removing duplicated code. Link: https://lore.kernel.org/r/20191104114036.9893-4-cgxu519@mykernel.net Signed-off-by: Chengguang Xu <cgxu519@mykernel.net> Signed-off-by: Jan Kara <jack@suse.cz>
2019-11-07ext2: skip unnecessary operations in ext2_try_to_allocate()Chengguang Xu1-1/+1
Move 'repeat' tag to proper place so that we can skip unnecessary operations in ext2_try_to_allocate(). Link: https://lore.kernel.org/r/20191104114036.9893-3-cgxu519@mykernel.net Signed-off-by: Chengguang Xu <cgxu519@mykernel.net> Signed-off-by: Jan Kara <jack@suse.cz>
2019-11-07ext2: Simplify initialization in ext2_try_to_allocate()Jan Kara1-17/+5
Somewhat simplify the logic initializing search start and end in ext2_try_to_allocate(). No functional change. Signed-off-by: Jan Kara <jack@suse.cz>
2019-11-06ext2: code cleanup by calling ext2_group_last_block_no()Chengguang Xu2-15/+9
Call common helper ext2_group_last_block_no() to calculate group last block number. Link: https://lore.kernel.org/r/20191104114036.9893-2-cgxu519@mykernel.net Signed-off-by: Chengguang Xu <cgxu519@mykernel.net> Signed-off-by: Jan Kara <jack@suse.cz>
2019-11-06ext2: introduce new helper ext2_group_last_block_no()Chengguang Xu1-0/+12
Introduce new helper ext2_group_last_block_no() to calculate last block num for specific block group, we can replace open coded logic by calling this common helper. Link: https://lore.kernel.org/r/20191104114036.9893-1-cgxu519@mykernel.net Signed-off-by: Chengguang Xu <cgxu519@mykernel.net> Signed-off-by: Jan Kara <jack@suse.cz>
2019-11-05ext2: check err when partial != NULLChengguang Xu1-2/+5
Check err when partial == NULL is meaningless because partial == NULL means getting branch successfully without error. CC: stable@vger.kernel.org Link: https://lore.kernel.org/r/20191105045100.7104-1-cgxu519@mykernel.net Signed-off-by: Chengguang Xu <cgxu519@mykernel.net> Signed-off-by: Jan Kara <jack@suse.cz>
2019-10-31ext2: don't set *count in the case of failure in ext2_try_to_allocate()Chengguang Xu1-1/+0
Currently we set *count to num(value 0) in the failure of block allocation in ext2_try_to_allocate(). Without reservation, we reuse *count(value 0) to retry block allocation and wrong *count will cause only allocating maximum 1 block even though having sufficent free blocks in that block group. Finally, it probably cause significant fragmentation. Link: https://lore.kernel.org/r/20191026090721.23794-1-cgxu519@mykernel.net Signed-off-by: Chengguang Xu <cgxu519@mykernel.net> Signed-off-by: Jan Kara <jack@suse.cz>
2019-10-24ext2: return error when fail to allocating memory in ioctlChengguang Xu1-1/+4
Currently, we do not check memory allocation result for ei->i_block_alloc_info in ioctl, this patch checks it and returns error in failure case. Link: https://lore.kernel.org/r/20191023135643.28837-1-cgxu519@mykernel.net Signed-off-by: Chengguang Xu <cgxu519@mykernel.net> Signed-off-by: Jan Kara <jack@suse.cz>
2019-10-22ext2: add missing brelse in ext2_new_blocks()Chengguang Xu1-0/+7
Fix missing brelse of bitmap_bh in the case of retry. Link: https://lore.kernel.org/r/20191022091738.9160-1-cgxu519@mykernel.net Signed-off-by: Chengguang Xu <cgxu519@mykernel.net> Signed-off-by: Jan Kara <jack@suse.cz>
2019-10-21ext2: adjust block num when retry allocationChengguang Xu1-0/+1
Set block num to original *count in a case of retrying allocation in case num < *count Link: https://lore.kernel.org/r/20191020232326.84881-1-cgxu519@mykernel.net Signed-off-by: Chengguang Xu <cgxu519@mykernel.net> Signed-off-by: Jan Kara <jack@suse.cz>
2019-09-21Merge tag 'for_v5.4-rc1' of ↵Linus Torvalds3-9/+6
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
2019-09-04ext2: Delete an unnecessary check before brelse()Markus Elfring1-2/+1
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>
2019-08-30fs: Fill in max and min timestamps in superblockDeepa Dinamani1-0/+2
Fill in the appropriate limits to avoid inconsistencies in the vfs cached inode times when timestamps are outside the permitted range. Even though some filesystems are read-only, fill in the timestamps to reflect the on-disk representation. Signed-off-by: Deepa Dinamani <deepa.kernel@gmail.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Acked-By: Tigran Aivazian <aivazian.tigran@gmail.com> Acked-by: Jeff Layton <jlayton@kernel.org> Cc: aivazian.tigran@gmail.com Cc: al@alarsen.net Cc: coda@cs.cmu.edu Cc: darrick.wong@oracle.com Cc: dushistov@mail.ru Cc: dwmw2@infradead.org Cc: hch@infradead.org Cc: jack@suse.com Cc: jaharkes@cs.cmu.edu Cc: luisbg@kernel.org Cc: nico@fluxnic.net Cc: phillip@squashfs.org.uk Cc: richard@nod.at Cc: salah.triki@gmail.com Cc: shaggy@kernel.org Cc: linux-xfs@vger.kernel.org Cc: codalist@coda.cs.cmu.edu Cc: linux-ext4@vger.kernel.org Cc: linux-mtd@lists.infradead.org Cc: jfs-discussion@lists.sourceforge.net Cc: reiserfs-devel@vger.kernel.org
2019-07-31ext2: code cleanup for ext2_free_blocks()Chengguang Xu1-3/+1
Call ext2_data_block_valid() for block range validity. Signed-off-by: Chengguang Xu <cgxu519@zoho.com.cn> Link: https://lore.kernel.org/r/20190723112155.20329-2-cgxu519@zoho.com.cn Signed-off-by: Jan Kara <jack@suse.cz>
2019-07-31ext2: fix block range in ext2_data_block_valid()Chengguang Xu2-4/+4
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>
2019-07-12Merge tag 'vfs-fix-ioctl-checking-3' of ↵Linus Torvalds1-12/+4
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
2019-07-10Merge tag 'for_v5.3-rc1' of ↵Linus Torvalds5-88/+108
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
2019-07-03ext2: Use kmemdup rather than duplicating its implementationFuqian Huang1-2/+1
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>
2019-07-01vfs: create a generic checking and prep function for FS_IOC_SETFLAGSDarrick J. Wong1-12/+4
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>
2019-06-19ext2: Always brelse bh on failure in ext2_iget()Jan Kara1-4/+2
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>
2019-06-19ext2: add missing brelse() in ext2_iget()Chengguang Xu1-0/+1
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>
2019-06-12ext2: Fix a typo in ext2_getattr argumentFumiya Shigemitsu1-1/+1
Fix a typo in a ext2_getattr argument Signed-off-by: Fumiya Shigemitsu <shfy1014@gmail.com> Signed-off-by: Jan Kara <jack@suse.cz>
2019-06-12ext2: fix a typo in commentChengguang Xu1-2/+1
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>
2019-05-30ext2: add missing brelse() in ext2_new_inode()Chengguang Xu1-0/+1
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>
2019-05-28ext2: optimize ext2_xattr_get()Chengguang Xu1-4/+8
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>
2019-05-28ext2: introduce new helper for xattr entry comparisonChengguang Xu1-7/+18
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>
2019-05-28ext2: merge xattr next entry check to ext2_xattr_entry_valid()Chengguang Xu1-20/+16
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>
2019-05-28ext2: code cleanup for ext2_preread_inode()Chengguang Xu1-3/+1
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>
2019-05-21treewide: Add SPDX license identifier - Makefile/KconfigThomas Gleixner1-0/+1
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>
2019-05-21treewide: Add SPDX license identifier for more missed filesThomas Gleixner1-0/+1
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>
2019-05-20ext2: code cleanup by using test_opt() and clear_opt()Chengguang Xu1-9/+8
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>
2019-05-20ext2: Strengthen xattr block checksJan Kara1-12/+10
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>
2019-05-20ext2: Merge loops in ext2_xattr_set()Jan Kara1-22/+19
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>
2019-05-20ext2: introduce helper for xattr entry validationChengguang Xu1-11/+21
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>
2019-05-20ext2: introduce helper for xattr header validationChengguang Xu1-11/+20
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>
2019-05-13Merge tag 'fs_for_v5.2-rc1' of ↵Linus Torvalds1-1/+3
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
2019-05-01ext2: switch to ->free_inode()Al Viro1-8/+2
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2019-03-26ext2: Adjust the comment of function ext2_alloc_branchShuning Zhang1-1/+3
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>
2019-03-07Merge tag 'fs_for_v5.1-rc1' of ↵Linus Torvalds8-19/+64
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
2019-02-18ext2: support statx syscallyangerkun5-0/+32
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>
2019-01-31ext2: Fix underflow in ext2_max_size()Jan Kara1-14/+25
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>
2019-01-29ext2: Fix a typo in commentLiu Xiang1-1/+1
Fix a typo in ext2_get_blocks comment. Signed-off-by: Liu Xiang <liu.xiang6@zte.com.cn> Signed-off-by: Jan Kara <jack@suse.cz>
2019-01-28ext2: Remove redundant check for finding no groupLiu Xiang1-2/+0
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>
2019-01-28ext2: Annotate implicit fall through in __ext2_truncate_blocksMathieu Malaterre1-0/+2
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>
2019-01-22ext2: Set superblock revision when enabling xattr featureJan Kara1-0/+1
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>
2019-01-22ext2: Remove redundant check on s_inode_sizeLiu Xiang1-2/+0
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>
2019-01-22ext2: set proper return codeChengguang Xu1-0/+3
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>
2019-01-21ext2: use common file type conversionPhillip Potter2-45/+6
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>
2018-12-27Merge tag 'fs_for_4.21-rc1' of ↵Linus Torvalds2-8/+7
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()
2018-11-27ext2: fix potential use after freePan Bian1-1/+1
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>
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-30 22:51:27 +0000