kernel/linux.git/fs/jbd2, branch linux-6.0.y

jbd2: add miss release buffer head in fc_do_one_pass()

2022-10-21T10:37:49+00:00

commit dfff66f30f66b9524b661f311bbed8ff3d2ca49f upstream. In fc_do_one_pass() miss release buffer head after use which will lead to reference count leak. Cc: stable@kernel.org Signed-off-by: Ye Bin Reviewed-by: Jan Kara Link: https://lore.kernel.org/r/20220917093805.1782845-1-yebin10@huawei.com Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman

jbd2: fix potential use-after-free in jbd2_fc_wait_bufs

2022-10-21T10:37:49+00:00

commit 243d1a5d505d0b0460c9af0ad56ed4a56ef0bebd upstream. In 'jbd2_fc_wait_bufs' use 'bh' after put buffer head reference count which may lead to use-after-free. So judge buffer if uptodate before put buffer head reference count. Cc: stable@kernel.org Signed-off-by: Ye Bin Reviewed-by: Jan Kara Link: https://lore.kernel.org/r/20220914100812.1414768-3-yebin10@huawei.com Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman

jbd2: fix potential buffer head reference count leak

2022-10-21T10:37:49+00:00

commit e0d5fc7a6d80ac2406c7dfc6bb625201d0250a8a upstream. As in 'jbd2_fc_wait_bufs' if buffer isn't uptodate, will return -EIO without update 'journal->j_fc_off'. But 'jbd2_fc_release_bufs' will release buffer head from ‘j_fc_off - 1’ if 'bh' is NULL will terminal release which will lead to buffer head buffer head reference count leak. To solve above issue, update 'journal->j_fc_off' before return -EIO. Cc: stable@kernel.org Signed-off-by: Ye Bin Reviewed-by: Jan Kara Link: https://lore.kernel.org/r/20220914100812.1414768-2-yebin10@huawei.com Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman

jbd2: wake up journal waiters in FIFO order, not LIFO

2022-10-21T10:37:48+00:00

commit 34fc8768ec6089565d6d73bad26724083cecf7bd upstream. LIFO wakeup order is unfair and sometimes leads to a journal user not being able to get a journal handle for hundreds of transactions in a row. FIFO wakeup can make things more fair. Cc: stable@kernel.org Signed-off-by: Alexey Lyashkov Reviewed-by: Ritesh Harjani (IBM) Link: https://lore.kernel.org/r/20220907165959.1137482-1-alexey.lyashkov@gmail.com Signed-off-by: Theodore Ts'o Signed-off-by: Greg Kroah-Hartman

Merge tag 'mm-stable-2022-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2022-08-05T23:32:45+00:00

Pull MM updates from Andrew Morton: "Most of the MM queue. A few things are still pending. Liam's maple tree rework didn't make it. This has resulted in a few other minor patch series being held over for next time. Multi-gen LRU still isn't merged as we were waiting for mapletree to stabilize. The current plan is to merge MGLRU into -mm soon and to later reintroduce mapletree, with a view to hopefully getting both into 6.1-rc1. Summary: - The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe Lin, Yang Shi, Anshuman Khandual and Mike Rapoport - Some kmemleak fixes from Patrick Wang and Waiman Long - DAMON updates from SeongJae Park - memcg debug/visibility work from Roman Gushchin - vmalloc speedup from Uladzislau Rezki - more folio conversion work from Matthew Wilcox - enhancements for coherent device memory mapping from Alex Sierra - addition of shared pages tracking and CoW support for fsdax, from Shiyang Ruan - hugetlb optimizations from Mike Kravetz - Mel Gorman has contributed some pagealloc changes to improve latency and realtime behaviour. - mprotect soft-dirty checking has been improved by Peter Xu - Many other singleton patches all over the place" [ XFS merge from hell as per Darrick Wong in https://lore.kernel.org/all/YshKnxb4VwXycPO8@magnolia/ ] * tag 'mm-stable-2022-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (282 commits) tools/testing/selftests/vm/hmm-tests.c: fix build mm: Kconfig: fix typo mm: memory-failure: convert to pr_fmt() mm: use is_zone_movable_page() helper hugetlbfs: fix inaccurate comment in hugetlbfs_statfs() hugetlbfs: cleanup some comments in inode.c hugetlbfs: remove unneeded header file hugetlbfs: remove unneeded hugetlbfs_ops forward declaration hugetlbfs: use helper macro SZ_1{K,M} mm: cleanup is_highmem() mm/hmm: add a test for cross device private faults selftests: add soft-dirty into run_vmtests.sh selftests: soft-dirty: add test for mprotect mm/mprotect: fix soft-dirty check in can_change_pte_writable() mm: memcontrol: fix potential oom_lock recursion deadlock mm/gup.c: fix formatting in check_and_migrate_movable_page() xfs: fail dax mount if reflink is enabled on a partition mm/memcontrol.c: remove the redundant updating of stats_flush_threshold userfaultfd: don't fail on unrecognized features hugetlb_cgroup: fix wrong hugetlb cgroup numa stat ...

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

2022-08-05T03:13:46+00:00

Pull ext4 updates from Ted Ts'o: "Add new ioctls to set and get the file system UUID in the ext4 superblock and improved the performance of the online resizing of file systems with bigalloc enabled. Fixed a lot of bugs, in particular for the inline data feature, potential races when creating and deleting inodes with shared extended attribute blocks, and the handling of directory blocks which are corrupted" * tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (37 commits) ext4: add ioctls to get/set the ext4 superblock uuid ext4: avoid resizing to a partial cluster size ext4: reduce computation of overhead during resize jbd2: fix assertion 'jh->b_frozen_data == NULL' failure when journal aborted ext4: block range must be validated before use in ext4_mb_clear_bb() mbcache: automatically delete entries from cache on freeing mbcache: Remove mb_cache_entry_delete() ext2: avoid deleting xattr block that is being reused ext2: unindent codeblock in ext2_xattr_set() ext2: factor our freeing of xattr block reference ext4: fix race when reusing xattr blocks ext4: unindent codeblock in ext4_xattr_block_set() ext4: remove EA inode entry from mbcache on inode eviction mbcache: add functions to delete entry if unused mbcache: don't reclaim used entries ext4: make sure ext4_append() always allocates new block ext4: check if directory block is within i_size ext4: reflect mb_optimize_scan value in options file ext4: avoid remove directory when directory is corrupted ext4: aligned '*' in comments ...

jbd2: fix assertion 'jh->b_frozen_data == NULL' failure when journal aborted

2022-08-03T03:56:25+00:00

Following process will fail assertion 'jh->b_frozen_data == NULL' in jbd2_journal_dirty_metadata(): jbd2_journal_commit_transaction unlink(dir/a) jh->b_transaction = trans1 jh->b_jlist = BJ_Metadata journal->j_running_transaction = NULL trans1->t_state = T_COMMIT unlink(dir/b) handle->h_trans = trans2 do_get_write_access jh->b_modified = 0 jh->b_frozen_data = frozen_buffer jh->b_next_transaction = trans2 jbd2_journal_dirty_metadata is_handle_aborted is_journal_aborted // return false --> jbd2 abort <-- while (commit_transaction->t_buffers) if (is_journal_aborted) jbd2_journal_refile_buffer __jbd2_journal_refile_buffer WRITE_ONCE(jh->b_transaction, jh->b_next_transaction) WRITE_ONCE(jh->b_next_transaction, NULL) __jbd2_journal_file_buffer(jh, BJ_Reserved) J_ASSERT_JH(jh, jh->b_frozen_data == NULL) // assertion failure ! The reproducer (See detail in [Link]) reports: ------------[ cut here ]------------ kernel BUG at fs/jbd2/transaction.c:1629! invalid opcode: 0000 [#1] PREEMPT SMP CPU: 2 PID: 584 Comm: unlink Tainted: G W 5.19.0-rc6-00115-g4a57a8400075-dirty #697 RIP: 0010:jbd2_journal_dirty_metadata+0x3c5/0x470 RSP: 0018:ffffc90000be7ce0 EFLAGS: 00010202 Call Trace: __ext4_handle_dirty_metadata+0xa0/0x290 ext4_handle_dirty_dirblock+0x10c/0x1d0 ext4_delete_entry+0x104/0x200 __ext4_unlink+0x22b/0x360 ext4_unlink+0x275/0x390 vfs_unlink+0x20b/0x4c0 do_unlinkat+0x42f/0x4c0 __x64_sys_unlink+0x37/0x50 do_syscall_64+0x35/0x80 After journal aborting, __jbd2_journal_refile_buffer() is executed with holding @jh->b_state_lock, we can fix it by moving 'is_handle_aborted()' into the area protected by @jh->b_state_lock. Link: https://bugzilla.kernel.org/show_bug.cgi?id=216251 Fixes: 470decc613ab20 ("[PATCH] jbd2: initial copy of files from jbd") Signed-off-by: Zhihao Cheng Link: https://lore.kernel.org/r/20220715125152.4022726-1-chengzhihao1@huawei.com Signed-off-by: Theodore Ts'o

jbd2: fix outstanding credits assert in jbd2_journal_commit_transaction()

2022-08-03T03:52:19+00:00

We catch an assert problem in jbd2_journal_commit_transaction() when doing fsstress and request falut injection tests. The problem is happened in a race condition between jbd2_journal_commit_transaction() and ext4_end_io_end(). Firstly, ext4_writepages() writeback dirty pages and start reserved handle, and then the journal was aborted due to some previous metadata IO error, jbd2_journal_abort() start to commit current running transaction, the committing procedure could be raced by ext4_end_io_end() and lead to subtract j_reserved_credits twice from commit_transaction->t_outstanding_credits, finally the t_outstanding_credits is mistakenly smaller than t_nr_buffers and trigger assert. kjournald2 kworker jbd2_journal_commit_transaction() write_unlock(&journal->j_state_lock); atomic_sub(j_reserved_credits, t_outstanding_credits); //sub once jbd2_journal_start_reserved() start_this_handle() //detect aborted journal jbd2_journal_free_reserved() //get running transaction read_lock(&journal->j_state_lock) __jbd2_journal_unreserve_handle() atomic_sub(j_reserved_credits, t_outstanding_credits); //sub again read_unlock(&journal->j_state_lock); journal->j_running_transaction = NULL; J_ASSERT(t_nr_buffers <= t_outstanding_credits) //bomb!!! Fix this issue by using journal->j_state_lock to protect the subtraction in jbd2_journal_commit_transaction(). Fixes: 96f1e0974575 ("jbd2: avoid long hold times of j_state_lock while committing a transaction") Signed-off-by: Zhang Yi Reviewed-by: Jan Kara Link: https://lore.kernel.org/r/20220611130426.2013258-1-yi.zhang@huawei.com Signed-off-by: Theodore Ts'o

jbd2: unexport jbd2_log_start_commit()

2022-08-03T03:52:19+00:00

jbd2_log_start_commit() is not used outside of jbd2 so unexport it. Also make __jbd2_log_start_commit() static when we are at it. Signed-off-by: Jan Kara Reviewed-by: Lukas Czerner Link: https://lore.kernel.org/r/20220608112355.4397-4-jack@suse.cz Signed-off-by: Theodore Ts'o

jbd2: remove unused exports for jbd2 debugging

2022-08-03T03:52:19+00:00

Jbd2 exports jbd2_journal_enable_debug and __jbd2_debug() depite the first is used only in fs/jbd2/journal.c and the second only within jbd2 code. Remove the pointless exports make jbd2_journal_enable_debug static. Signed-off-by: Jan Kara Reviewed-by: Lukas Czerner Link: https://lore.kernel.org/r/20220608112355.4397-3-jack@suse.cz Signed-off-by: Theodore Ts'o