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possible deadlock in ocfs2_reserve_local_alloc_bits

Status: upstream: reported C repro on 2024/09/27 17:46
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+fa8da3e825fdf84780a0@syzkaller.appspotmail.com
First crash: 406d, last: 52m
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2024/09/28 linux-5.15.y (ToT) 3a5928702e71 C [report] possible deadlock in ocfs2_reserve_local_alloc_bits
2024/09/28 upstream (ToT) 3efc57369a0c C Didn't crash
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream possible deadlock in ocfs2_reserve_local_alloc_bits ocfs2 4 C done 20262 45m 442d 0/29 upstream: reported C repro on 2024/08/22 12:35
linux-6.1 possible deadlock in ocfs2_reserve_local_alloc_bits origin:lts-only 4 C inconclusive 1624 1d00h 405d 0/3 upstream: reported C repro on 2024/09/28 04:05
linux-6.6 possible deadlock in ocfs2_reserve_local_alloc_bits origin:upstream 4 C 15 2d07h 143d 0/2 upstream: reported C repro on 2025/06/17 01:40
▶ ▼ Fix bisection attempts (2)
Created Duration User Patch Repo Result
2025/09/04 20:36 3m fix candidate upstream error job log
2024/10/14 23:59 0m fix candidate upstream error job log

Sample crash report:
======================================================
WARNING: possible circular locking dependency detected
5.15.167-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor181/4042 is trying to acquire lock:
ffff0000dcc4e650 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_local_alloc_slide_window fs/ocfs2/localalloc.c:1258 [inline]
ffff0000dcc4e650 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_reserve_local_alloc_bits+0x998/0x2474 fs/ocfs2/localalloc.c:668

but task is already holding lock:
ffff0000e19db488 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline]
ffff0000e19db488 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x164/0x416c fs/ocfs2/suballoc.c:782

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}:
       down_write+0xbc/0x12c kernel/locking/rwsem.c:1551
       inode_lock include/linux/fs.h:789 [inline]
       ocfs2_reserve_suballoc_bits+0x164/0x416c fs/ocfs2/suballoc.c:782
       ocfs2_reserve_cluster_bitmap_bits+0xcc/0x1e0 fs/ocfs2/suballoc.c:1128
       ocfs2_local_alloc_reserve_for_window fs/ocfs2/localalloc.c:1112 [inline]
       ocfs2_local_alloc_slide_window fs/ocfs2/localalloc.c:1248 [inline]
       ocfs2_reserve_local_alloc_bits+0x738/0x2474 fs/ocfs2/localalloc.c:668
       ocfs2_reserve_clusters_with_limit+0x194/0xabc fs/ocfs2/suballoc.c:1162
       ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1223 [inline]
       ocfs2_lock_allocators+0x294/0x584 fs/ocfs2/suballoc.c:2669
       ocfs2_extend_allocation+0x474/0x18e4 fs/ocfs2/file.c:588
       ocfs2_extend_no_holes+0x1b0/0x45c fs/ocfs2/file.c:1030
       ocfs2_acquire_dquot+0x5f8/0xa90 fs/ocfs2/quota_global.c:836
       dqget+0x664/0xd0c fs/quota/dquot.c:986
       ocfs2_setattr+0xc7c/0x191c fs/ocfs2/file.c:1243
       notify_change+0xa34/0xcf8 fs/attr.c:505
       chown_common+0x4ac/0x74c fs/open.c:680
       vfs_fchown fs/open.c:748 [inline]
       ksys_fchown+0xe0/0x158 fs/open.c:759
       __do_sys_fchown fs/open.c:767 [inline]
       __se_sys_fchown fs/open.c:765 [inline]
       __arm64_sys_fchown+0x7c/0x94 fs/open.c:765
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
       do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
       el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
       el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
       el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

-> #7 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}:
       down_write+0xbc/0x12c kernel/locking/rwsem.c:1551
       inode_lock include/linux/fs.h:789 [inline]
       ocfs2_reserve_local_alloc_bits+0xfc/0x2474 fs/ocfs2/localalloc.c:635
       ocfs2_reserve_clusters_with_limit+0x194/0xabc fs/ocfs2/suballoc.c:1162
       ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1223 [inline]
       ocfs2_lock_allocators+0x294/0x584 fs/ocfs2/suballoc.c:2669
       ocfs2_extend_allocation+0x474/0x18e4 fs/ocfs2/file.c:588
       ocfs2_extend_no_holes+0x1b0/0x45c fs/ocfs2/file.c:1030
       ocfs2_acquire_dquot+0x5f8/0xa90 fs/ocfs2/quota_global.c:836
       dqget+0x664/0xd0c fs/quota/dquot.c:986
       ocfs2_setattr+0xc7c/0x191c fs/ocfs2/file.c:1243
       notify_change+0xa34/0xcf8 fs/attr.c:505
       chown_common+0x4ac/0x74c fs/open.c:680
       vfs_fchown fs/open.c:748 [inline]
       ksys_fchown+0xe0/0x158 fs/open.c:759
       __do_sys_fchown fs/open.c:767 [inline]
       __se_sys_fchown fs/open.c:765 [inline]
       __arm64_sys_fchown+0x7c/0x94 fs/open.c:765
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
       do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
       el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
       el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
       el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

-> #6 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}:
       down_write+0xbc/0x12c kernel/locking/rwsem.c:1551
       ocfs2_lock_global_qf+0x1d4/0x260 fs/ocfs2/quota_global.c:314
       ocfs2_acquire_dquot+0x258/0xa90 fs/ocfs2/quota_global.c:811
       dqget+0x664/0xd0c fs/quota/dquot.c:986
       ocfs2_setattr+0xc7c/0x191c fs/ocfs2/file.c:1243
       notify_change+0xa34/0xcf8 fs/attr.c:505
       chown_common+0x4ac/0x74c fs/open.c:680
       vfs_fchown fs/open.c:748 [inline]
       ksys_fchown+0xe0/0x158 fs/open.c:759
       __do_sys_fchown fs/open.c:767 [inline]
       __se_sys_fchown fs/open.c:765 [inline]
       __arm64_sys_fchown+0x7c/0x94 fs/open.c:765
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
       do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
       el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
       el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
       el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

-> #5 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}:
       down_write+0xbc/0x12c kernel/locking/rwsem.c:1551
       inode_lock include/linux/fs.h:789 [inline]
       ocfs2_lock_global_qf+0x1b8/0x260 fs/ocfs2/quota_global.c:313
       ocfs2_acquire_dquot+0x258/0xa90 fs/ocfs2/quota_global.c:811
       dqget+0x664/0xd0c fs/quota/dquot.c:986
       ocfs2_setattr+0xc7c/0x191c fs/ocfs2/file.c:1243
       notify_change+0xa34/0xcf8 fs/attr.c:505
       chown_common+0x4ac/0x74c fs/open.c:680
       vfs_fchown fs/open.c:748 [inline]
       ksys_fchown+0xe0/0x158 fs/open.c:759
       __do_sys_fchown fs/open.c:767 [inline]
       __se_sys_fchown fs/open.c:765 [inline]
       __arm64_sys_fchown+0x7c/0x94 fs/open.c:765
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
       do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
       el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
       el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
       el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

-> #4 (&dquot->dq_lock){+.+.}-{3:3}:
       __mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596
       __mutex_lock kernel/locking/mutex.c:729 [inline]
       mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
       dquot_commit+0x54/0x240 fs/quota/dquot.c:507
       ext4_write_dquot+0x1b4/0x314 fs/ext4/super.c:6172
       ext4_mark_dquot_dirty+0xe8/0x140 fs/ext4/super.c:6232
       mark_dquot_dirty fs/quota/dquot.c:372 [inline]
       mark_all_dquot_dirty+0x108/0x424 fs/quota/dquot.c:412
       __dquot_free_space+0x878/0xce8 fs/quota/dquot.c:1940
       dquot_free_space_nodirty include/linux/quotaops.h:376 [inline]
       dquot_free_space include/linux/quotaops.h:381 [inline]
       dquot_free_block include/linux/quotaops.h:392 [inline]
       ext4_mb_clear_bb fs/ext4/mballoc.c:6158 [inline]
       ext4_free_blocks+0x1c0c/0x2bf0 fs/ext4/mballoc.c:6288
       ext4_remove_blocks fs/ext4/extents.c:2519 [inline]
       ext4_ext_rm_leaf fs/ext4/extents.c:2685 [inline]
       ext4_ext_remove_space+0x1c48/0x4254 fs/ext4/extents.c:2933
       ext4_ext_truncate+0x188/0x250 fs/ext4/extents.c:4450
       ext4_truncate+0x9c4/0x1058 fs/ext4/inode.c:4249
       ext4_evict_inode+0xc30/0x124c fs/ext4/inode.c:289
       evict+0x418/0x894 fs/inode.c:622
       iput_final fs/inode.c:1740 [inline]
       iput+0x744/0x824 fs/inode.c:1766
       ext4_process_orphan+0x244/0x2b8 fs/ext4/orphan.c:360
       ext4_orphan_cleanup+0x8bc/0x1048 fs/ext4/orphan.c:474
       ext4_fill_super+0x8044/0x8768 fs/ext4/super.c:4974
       mount_bdev+0x274/0x370 fs/super.c:1398
       ext4_mount+0x44/0x58 fs/ext4/super.c:6602
       legacy_get_tree+0xd4/0x16c fs/fs_context.c:611
       vfs_get_tree+0x90/0x274 fs/super.c:1528
       do_new_mount+0x278/0x8fc fs/namespace.c:3005
       path_mount+0x594/0x101c fs/namespace.c:3335
       do_mount fs/namespace.c:3348 [inline]
       __do_sys_mount fs/namespace.c:3556 [inline]
       __se_sys_mount fs/namespace.c:3533 [inline]
       __arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3533
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
       do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
       el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
       el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
       el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

-> #3 (&ei->i_data_sem){++++}-{3:3}:
       down_write+0xbc/0x12c kernel/locking/rwsem.c:1551
       ext4_map_blocks+0x830/0x1a44 fs/ext4/inode.c:665
       mpage_map_one_extent fs/ext4/inode.c:2407 [inline]
       mpage_map_and_submit_extent fs/ext4/inode.c:2460 [inline]
       ext4_writepages+0x12c0/0x36fc fs/ext4/inode.c:2828
       do_writepages+0x39c/0x5ec mm/page-writeback.c:2386
       __writeback_single_inode+0x148/0x13a4 fs/fs-writeback.c:1647
       writeback_sb_inodes+0x94c/0x1654 fs/fs-writeback.c:1930
       __writeback_inodes_wb+0x110/0x39c fs/fs-writeback.c:2001
       wb_writeback+0x410/0xfc8 fs/fs-writeback.c:2106
       wb_check_background_flush fs/fs-writeback.c:2172 [inline]
       wb_do_writeback fs/fs-writeback.c:2260 [inline]
       wb_workfn+0xc44/0x1070 fs/fs-writeback.c:2288
       process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
       worker_thread+0x910/0x1034 kernel/workqueue.c:2457
       kthread+0x37c/0x45c kernel/kthread.c:334
       ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870

-> #2 (jbd2_handle){.+.+}-{0:0}:
       start_this_handle+0xfc0/0x12a4 fs/jbd2/transaction.c:464
       jbd2__journal_start+0x29c/0x7b4 fs/jbd2/transaction.c:521
       jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:560
       ocfs2_start_trans+0x468/0x804 fs/ocfs2/journal.c:354
       ocfs2_modify_bh+0xe4/0x498 fs/ocfs2/quota_local.c:101
       ocfs2_local_read_info+0xec8/0x1550 fs/ocfs2/quota_local.c:766
       dquot_load_quota_sb+0x6f0/0xb1c fs/quota/dquot.c:2461
       dquot_load_quota_inode+0x280/0x4f4 fs/quota/dquot.c:2498
       ocfs2_enable_quotas+0x17c/0x3cc fs/ocfs2/super.c:927
       ocfs2_fill_super+0x3698/0x498c fs/ocfs2/super.c:1140
       mount_bdev+0x274/0x370 fs/super.c:1398
       ocfs2_mount+0x44/0x58 fs/ocfs2/super.c:1187
       legacy_get_tree+0xd4/0x16c fs/fs_context.c:611
       vfs_get_tree+0x90/0x274 fs/super.c:1528
       do_new_mount+0x278/0x8fc fs/namespace.c:3005
       path_mount+0x594/0x101c fs/namespace.c:3335
       do_mount fs/namespace.c:3348 [inline]
       __do_sys_mount fs/namespace.c:3556 [inline]
       __se_sys_mount fs/namespace.c:3533 [inline]
       __arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3533
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
       do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
       el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
       el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
       el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

-> #1 (&journal->j_trans_barrier){.+.+}-{3:3}:
       down_read+0xc0/0x398 kernel/locking/rwsem.c:1498
       ocfs2_start_trans+0x45c/0x804 fs/ocfs2/journal.c:352
       ocfs2_modify_bh+0xe4/0x498 fs/ocfs2/quota_local.c:101
       ocfs2_local_read_info+0xec8/0x1550 fs/ocfs2/quota_local.c:766
       dquot_load_quota_sb+0x6f0/0xb1c fs/quota/dquot.c:2461
       dquot_load_quota_inode+0x280/0x4f4 fs/quota/dquot.c:2498
       ocfs2_enable_quotas+0x17c/0x3cc fs/ocfs2/super.c:927
       ocfs2_fill_super+0x3698/0x498c fs/ocfs2/super.c:1140
       mount_bdev+0x274/0x370 fs/super.c:1398
       ocfs2_mount+0x44/0x58 fs/ocfs2/super.c:1187
       legacy_get_tree+0xd4/0x16c fs/fs_context.c:611
       vfs_get_tree+0x90/0x274 fs/super.c:1528
       do_new_mount+0x278/0x8fc fs/namespace.c:3005
       path_mount+0x594/0x101c fs/namespace.c:3335
       do_mount fs/namespace.c:3348 [inline]
       __do_sys_mount fs/namespace.c:3556 [inline]
       __se_sys_mount fs/namespace.c:3533 [inline]
       __arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3533
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
       do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
       el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
       el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
       el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

-> #0 (sb_internal#2){.+.+}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3053 [inline]
       check_prevs_add kernel/locking/lockdep.c:3172 [inline]
       validate_chain kernel/locking/lockdep.c:3788 [inline]
       __lock_acquire+0x32d4/0x7638 kernel/locking/lockdep.c:5012
       lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623
       percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
       __sb_start_write include/linux/fs.h:1811 [inline]
       sb_start_intwrite include/linux/fs.h:1928 [inline]
       ocfs2_start_trans+0x2dc/0x804 fs/ocfs2/journal.c:350
       ocfs2_local_alloc_slide_window fs/ocfs2/localalloc.c:1258 [inline]
       ocfs2_reserve_local_alloc_bits+0x998/0x2474 fs/ocfs2/localalloc.c:668
       ocfs2_reserve_clusters_with_limit+0x194/0xabc fs/ocfs2/suballoc.c:1162
       ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1223 [inline]
       ocfs2_lock_allocators+0x294/0x584 fs/ocfs2/suballoc.c:2669
       ocfs2_extend_allocation+0x474/0x18e4 fs/ocfs2/file.c:588
       ocfs2_extend_no_holes+0x1b0/0x45c fs/ocfs2/file.c:1030
       ocfs2_acquire_dquot+0x5f8/0xa90 fs/ocfs2/quota_global.c:836
       dqget+0x664/0xd0c fs/quota/dquot.c:986
       ocfs2_setattr+0xc7c/0x191c fs/ocfs2/file.c:1243
       notify_change+0xa34/0xcf8 fs/attr.c:505
       chown_common+0x4ac/0x74c fs/open.c:680
       vfs_fchown fs/open.c:748 [inline]
       ksys_fchown+0xe0/0x158 fs/open.c:759
       __do_sys_fchown fs/open.c:767 [inline]
       __se_sys_fchown fs/open.c:765 [inline]
       __arm64_sys_fchown+0x7c/0x94 fs/open.c:765
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
       do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
       el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
       el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
       el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

other info that might help us debug this:

Chain exists of:
  sb_internal#2 --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3 --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4);
                               lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3);
                               lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4);
  lock(sb_internal#2);

 *** DEADLOCK ***

7 locks held by syz-executor181/4042:
 #0: ffff0000dcc4e460 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write_file+0x64/0x1e8 fs/namespace.c:421
 #1: ffff0000e19c89c8 (&type->i_mutex_dir_key#6){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline]
 #1: ffff0000e19c89c8 (&type->i_mutex_dir_key#6){+.+.}-{3:3}, at: chown_common+0x3f8/0x74c fs/open.c:674
 #2: ffff0000e19360a8 (&dquot->dq_lock){+.+.}-{3:3}, at: ocfs2_acquire_dquot+0x24c/0xa90 fs/ocfs2/quota_global.c:806
 #3: ffff0000e19dd108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline]
 #3: ffff0000e19dd108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_lock_global_qf+0x1b8/0x260 fs/ocfs2/quota_global.c:313
 #4: ffff0000e19dcda0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_lock_global_qf+0x1d4/0x260 fs/ocfs2/quota_global.c:314
 #5: ffff0000e185a648 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline]
 #5: ffff0000e185a648 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: ocfs2_reserve_local_alloc_bits+0xfc/0x2474 fs/ocfs2/localalloc.c:635
 #6: ffff0000e19db488 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline]
 #6: ffff0000e19db488 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x164/0x416c fs/ocfs2/suballoc.c:782

stack backtrace:
CPU: 1 PID: 4042 Comm: syz-executor181 Not tainted 5.15.167-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 dump_stack+0x1c/0x58 lib/dump_stack.c:113
 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2011
 check_noncircular+0x2cc/0x378 kernel/locking/lockdep.c:2133
 check_prev_add kernel/locking/lockdep.c:3053 [inline]
 check_prevs_add kernel/locking/lockdep.c:3172 [inline]
 validate_chain kernel/locking/lockdep.c:3788 [inline]
 __lock_acquire+0x32d4/0x7638 kernel/locking/lockdep.c:5012
 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623
 percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
 __sb_start_write include/linux/fs.h:1811 [inline]
 sb_start_intwrite include/linux/fs.h:1928 [inline]
 ocfs2_start_trans+0x2dc/0x804 fs/ocfs2/journal.c:350
 ocfs2_local_alloc_slide_window fs/ocfs2/localalloc.c:1258 [inline]
 ocfs2_reserve_local_alloc_bits+0x998/0x2474 fs/ocfs2/localalloc.c:668
 ocfs2_reserve_clusters_with_limit+0x194/0xabc fs/ocfs2/suballoc.c:1162
 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1223 [inline]
 ocfs2_lock_allocators+0x294/0x584 fs/ocfs2/suballoc.c:2669
 ocfs2_extend_allocation+0x474/0x18e4 fs/ocfs2/file.c:588
 ocfs2_extend_no_holes+0x1b0/0x45c fs/ocfs2/file.c:1030
 ocfs2_acquire_dquot+0x5f8/0xa90 fs/ocfs2/quota_global.c:836
 dqget+0x664/0xd0c fs/quota/dquot.c:986
 ocfs2_setattr+0xc7c/0x191c fs/ocfs2/file.c:1243
 notify_change+0xa34/0xcf8 fs/attr.c:505
 chown_common+0x4ac/0x74c fs/open.c:680
 vfs_fchown fs/open.c:748 [inline]
 ksys_fchown+0xe0/0x158 fs/open.c:759
 __do_sys_fchown fs/open.c:767 [inline]
 __se_sys_fchown fs/open.c:765 [inline]
 __arm64_sys_fchown+0x7c/0x94 fs/open.c:765
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

Crashes (1438):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/09/28 21:40 linux-5.15.y 3a5928702e71 ba29ff75 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-5-15-kasan-arm64 possible deadlock in ocfs2_reserve_local_alloc_bits
2024/11/07 10:36 linux-5.15.y 72244eab0dad df3dc63b .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2024/09/29 13:48 linux-5.15.y 3a5928702e71 ba29ff75 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci2-linux-5-15-kasan-arm64 possible deadlock in ocfs2_reserve_local_alloc_bits
2025/11/07 21:02 linux-5.15.y cc5ec8769306 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/11/07 19:12 linux-5.15.y cc5ec8769306 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/11/06 20:34 linux-5.15.y cc5ec8769306 4e1406b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/11/05 10:13 linux-5.15.y cc5ec8769306 a6c9c731 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/11/05 08:17 linux-5.15.y cc5ec8769306 a6c9c731 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/11/04 00:34 linux-5.15.y cc5ec8769306 686bf657 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/11/03 15:03 linux-5.15.y cc5ec8769306 2c50b6a9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/11/03 03:45 linux-5.15.y cc5ec8769306 2c50b6a9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/29 21:04 linux-5.15.y cc5ec8769306 fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/29 19:12 linux-5.15.y cc5ec8769306 fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/29 17:50 linux-5.15.y cc5ec8769306 fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/29 15:53 linux-5.15.y cc5ec8769306 fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/29 04:09 linux-5.15.y ac56c046adf4 fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/28 10:04 linux-5.15.y ac56c046adf4 fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/27 20:07 linux-5.15.y ac56c046adf4 fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/27 17:37 linux-5.15.y ac56c046adf4 fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/27 15:09 linux-5.15.y ac56c046adf4 fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/26 23:02 linux-5.15.y ac56c046adf4 c0460fcd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/26 18:05 linux-5.15.y ac56c046adf4 c0460fcd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/25 20:07 linux-5.15.y ac56c046adf4 c0460fcd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/24 05:12 linux-5.15.y ac56c046adf4 c0460fcd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/19 19:35 linux-5.15.y ac56c046adf4 1c8c8cd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/19 17:40 linux-5.15.y ac56c046adf4 1c8c8cd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/19 06:21 linux-5.15.y 29e53a5b1c4f 1c8c8cd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/19 00:42 linux-5.15.y 29e53a5b1c4f 1c8c8cd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/18 03:25 linux-5.15.y 29e53a5b1c4f 1c8c8cd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/18 00:43 linux-5.15.y 29e53a5b1c4f 1c8c8cd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/17 16:01 linux-5.15.y 29e53a5b1c4f 7adf5298 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/16 02:01 linux-5.15.y 29e53a5b1c4f 19568248 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/15 21:54 linux-5.15.y 29e53a5b1c4f 19568248 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/15 05:15 linux-5.15.y 29e53a5b1c4f b6605ba8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/14 17:00 linux-5.15.y 29e53a5b1c4f b6605ba8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/13 18:52 linux-5.15.y 29e53a5b1c4f b6605ba8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/12 13:44 linux-5.15.y 29e53a5b1c4f ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/12 02:41 linux-5.15.y 29e53a5b1c4f ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/11 22:52 linux-5.15.y 29e53a5b1c4f ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/11 19:50 linux-5.15.y 29e53a5b1c4f ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/11 19:47 linux-5.15.y 29e53a5b1c4f ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/10 05:51 linux-5.15.y 29e53a5b1c4f ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/10 02:43 linux-5.15.y 29e53a5b1c4f ff1712fe .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/09 16:53 linux-5.15.y 29e53a5b1c4f 7e2882b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/08 01:29 linux-5.15.y 29e53a5b1c4f 7e2882b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/07 00:15 linux-5.15.y 29e53a5b1c4f 8ef35d49 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/05 06:03 linux-5.15.y 29e53a5b1c4f 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/04 16:40 linux-5.15.y 29e53a5b1c4f 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/04 02:49 linux-5.15.y 29e53a5b1c4f 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/03 11:24 linux-5.15.y 29e53a5b1c4f 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/02 00:13 linux-5.15.y 43bb85222e53 267f56c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/01 18:24 linux-5.15.y 43bb85222e53 a1859138 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/01 12:32 linux-5.15.y 43bb85222e53 a1859138 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/01 03:47 linux-5.15.y 43bb85222e53 65a0eece .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/10/01 00:06 linux-5.15.y 43bb85222e53 65a0eece .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2024/09/27 17:46 linux-5.15.y 3a5928702e71 440b26ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan possible deadlock in ocfs2_reserve_local_alloc_bits
2025/08/27 00:24 linux-5.15.y c79648372d02 e12e5ba4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 possible deadlock in ocfs2_reserve_local_alloc_bits
* Struck through repros no longer work on HEAD.