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possible deadlock in ocfs2_acquire_dquot

Status: upstream: reported C repro on 2024/09/30 01:47
Subsystems: ocfs2
[Documentation on labels]
Reported-by: syzbot+51244a05705883616c95@syzkaller.appspotmail.com
First crash: 415d, last: 15m
▶ ▼ Discussions (13)
Title Replies (including bot) Last reply
[syzbot] Monthly ocfs2 report (Nov 2025) 0 (1) 2025/11/03 13:10
[syzbot] Monthly ocfs2 report (Oct 2025) 0 (1) 2025/10/03 06:37
[syzbot] Monthly ocfs2 report (Sep 2025) 0 (1) 2025/09/02 09:20
[syzbot] Monthly ocfs2 report (Aug 2025) 0 (1) 2025/08/01 13:49
[syzbot] Monthly ocfs2 report (Jul 2025) 0 (1) 2025/07/01 10:01
[syzbot] Monthly ocfs2 report (May 2025) 0 (1) 2025/06/03 11:11
[syzbot] Monthly ocfs2 report (Apr 2025) 0 (1) 2025/04/29 12:47
[syzbot] Monthly ocfs2 report (Mar 2025) 0 (1) 2025/03/31 13:08
[syzbot] Monthly ocfs2 report (Feb 2025) 0 (1) 2025/02/26 12:08
[syzbot] Monthly ocfs2 report (Dec 2024) 0 (1) 2024/12/26 08:58
[syzbot] Monthly ocfs2 report (Nov 2024) 0 (1) 2024/11/25 10:35
[syzbot] [ocfs2?] possible deadlock in ocfs2_acquire_dquot 0 (2) 2024/10/25 01:08
[syzbot] Monthly ocfs2 report (Oct 2024) 0 (1) 2024/10/24 08:02
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 possible deadlock in ocfs2_acquire_dquot origin:lts-only 4 C inconclusive 13926 1h36m 415d 0/3 upstream: reported C repro on 2024/09/26 09:48
linux-6.6 possible deadlock in ocfs2_acquire_dquot 4 8 29d 74d 0/2 upstream: reported on 2025/09/02 13:27
linux-5.15 possible deadlock in ocfs2_acquire_dquot origin:lts-only 4 C error 12310 3h01m 415d 0/3 upstream: reported C repro on 2024/09/26 06:26

Sample crash report:
(syz.2.25,6790,0):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x98842a5e, computed 0xe74db1cd. Applying ECC.
(syz.2.25,6790,0):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x1cec3d0f, computed 0xd2ffbdfe. Applying ECC.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.2.25/6790 is trying to acquire lock:
ffff0000dd742618 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_acquire_dquot+0x594/0xa10 fs/ocfs2/quota_global.c:860

but task is already holding lock:
ffff0000f5c75be0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_lock_global_qf+0x1a8/0x22c fs/ocfs2/quota_global.c:314

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #6 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}:
       down_write+0x50/0xc0 kernel/locking/rwsem.c:1590
       ocfs2_lock_global_qf+0x1a8/0x22c fs/ocfs2/quota_global.c:314
       ocfs2_acquire_dquot+0x258/0xa10 fs/ocfs2/quota_global.c:828
       dqget+0x654/0xccc fs/quota/dquot.c:977
       __dquot_initialize+0x2d4/0xa80 fs/quota/dquot.c:1505
       dquot_initialize+0x24/0x34 fs/quota/dquot.c:1567
       ocfs2_get_init_inode+0x134/0x1a8 fs/ocfs2/namei.c:205
       ocfs2_mknod+0x734/0x1cf0 fs/ocfs2/namei.c:313
       ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:676
       lookup_open fs/namei.c:3708 [inline]
       open_last_lookups fs/namei.c:3807 [inline]
       path_openat+0x12d8/0x2c40 fs/namei.c:4043
       do_filp_open+0x18c/0x36c fs/namei.c:4073
       do_sys_openat2+0x11c/0x1b4 fs/open.c:1435
       do_sys_open fs/open.c:1450 [inline]
       __do_sys_openat fs/open.c:1466 [inline]
       __se_sys_openat fs/open.c:1461 [inline]
       __arm64_sys_openat+0x120/0x158 fs/open.c:1461
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #5 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}:
       down_write+0x50/0xc0 kernel/locking/rwsem.c:1590
       inode_lock include/linux/fs.h:870 [inline]
       ocfs2_lock_global_qf+0x18c/0x22c fs/ocfs2/quota_global.c:313
       ocfs2_acquire_dquot+0x258/0xa10 fs/ocfs2/quota_global.c:828
       dqget+0x654/0xccc fs/quota/dquot.c:977
       __dquot_initialize+0x2d4/0xa80 fs/quota/dquot.c:1505
       dquot_initialize+0x24/0x34 fs/quota/dquot.c:1567
       ocfs2_get_init_inode+0x134/0x1a8 fs/ocfs2/namei.c:205
       ocfs2_mknod+0x734/0x1cf0 fs/ocfs2/namei.c:313
       ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:676
       lookup_open fs/namei.c:3708 [inline]
       open_last_lookups fs/namei.c:3807 [inline]
       path_openat+0x12d8/0x2c40 fs/namei.c:4043
       do_filp_open+0x18c/0x36c fs/namei.c:4073
       do_sys_openat2+0x11c/0x1b4 fs/open.c:1435
       do_sys_open fs/open.c:1450 [inline]
       __do_sys_openat fs/open.c:1466 [inline]
       __se_sys_openat fs/open.c:1461 [inline]
       __arm64_sys_openat+0x120/0x158 fs/open.c:1461
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #4 (&dquot->dq_lock){+.+.}-{4:4}:
       __mutex_lock_common+0x1d0/0x2678 kernel/locking/mutex.c:598
       __mutex_lock kernel/locking/mutex.c:760 [inline]
       mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:812
       wait_on_dquot fs/quota/dquot.c:354 [inline]
       dqget+0x5e4/0xccc fs/quota/dquot.c:972
       __dquot_initialize+0x264/0xa80 fs/quota/dquot.c:1505
       dquot_initialize+0x24/0x34 fs/quota/dquot.c:1567
       __ext4_new_inode+0x618/0x3190 fs/ext4/ialloc.c:994
       ext4_xattr_inode_create fs/ext4/xattr.c:1478 [inline]
       ext4_xattr_inode_lookup_create+0x82c/0x1768 fs/ext4/xattr.c:1588
       ext4_xattr_block_set+0x1bc/0x24bc fs/ext4/xattr.c:1908
       ext4_xattr_set_handle+0xde8/0x1260 fs/ext4/xattr.c:2447
       ext4_xattr_set+0x1e4/0x2b8 fs/ext4/xattr.c:2549
       ext4_xattr_trusted_set+0x4c/0x64 fs/ext4/xattr_trusted.c:38
       __vfs_setxattr+0x3d8/0x400 fs/xattr.c:200
       __vfs_setxattr_noperm+0x120/0x5c4 fs/xattr.c:234
       __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:295
       vfs_setxattr+0x158/0x2ac fs/xattr.c:321
       do_setxattr fs/xattr.c:636 [inline]
       filename_setxattr+0x20c/0x4f8 fs/xattr.c:665
       path_setxattrat+0x2e8/0x320 fs/xattr.c:713
       __do_sys_setxattr fs/xattr.c:747 [inline]
       __se_sys_setxattr fs/xattr.c:743 [inline]
       __arm64_sys_setxattr+0xc0/0xdc fs/xattr.c:743
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #3 (&ei->xattr_sem){++++}-{4:4}:
       down_write+0x50/0xc0 kernel/locking/rwsem.c:1590
       ext4_write_lock_xattr fs/ext4/xattr.h:157 [inline]
       ext4_xattr_set_handle+0x11c/0x1260 fs/ext4/xattr.c:2362
       ext4_initxattrs+0xa4/0x11c fs/ext4/xattr_security.c:44
       security_inode_init_security+0x6dc/0x7f4 security/security.c:1852
       ext4_init_security+0x44/0x58 fs/ext4/xattr_security.c:58
       __ext4_new_inode+0x27f4/0x3190 fs/ext4/ialloc.c:1325
       ext4_create+0x1f8/0x3fc fs/ext4/namei.c:2822
       lookup_open fs/namei.c:3708 [inline]
       open_last_lookups fs/namei.c:3807 [inline]
       path_openat+0x12d8/0x2c40 fs/namei.c:4043
       do_filp_open+0x18c/0x36c fs/namei.c:4073
       do_sys_openat2+0x11c/0x1b4 fs/open.c:1435
       do_sys_open fs/open.c:1450 [inline]
       __do_sys_openat fs/open.c:1466 [inline]
       __se_sys_openat fs/open.c:1461 [inline]
       __arm64_sys_openat+0x120/0x158 fs/open.c:1461
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #2 (jbd2_handle){++++}-{0:0}:
       start_this_handle+0xe74/0x10dc fs/jbd2/transaction.c:444
       jbd2__journal_start+0x288/0x51c fs/jbd2/transaction.c:501
       jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:540
       ocfs2_start_trans+0x368/0x6b0 fs/ocfs2/journal.c:374
       ocfs2_modify_bh+0xe4/0x43c fs/ocfs2/quota_local.c:101
       ocfs2_local_read_info+0x104c/0x1364 fs/ocfs2/quota_local.c:767
       dquot_load_quota_sb+0x6bc/0xa90 fs/quota/dquot.c:2459
       dquot_load_quota_inode+0x274/0x4e4 fs/quota/dquot.c:2496
       ocfs2_enable_quotas+0x17c/0x3b4 fs/ocfs2/super.c:930
       ocfs2_fill_super+0x4004/0x532c fs/ocfs2/super.c:1140
       get_tree_bdev_flags+0x360/0x414 fs/super.c:1692
       get_tree_bdev+0x2c/0x3c fs/super.c:1715
       ocfs2_get_tree+0x28/0x38 fs/ocfs2/super.c:1184
       vfs_get_tree+0x90/0x28c fs/super.c:1815
       do_new_mount+0x278/0x7f4 fs/namespace.c:3808
       path_mount+0x5b4/0xde0 fs/namespace.c:4123
       do_mount fs/namespace.c:4136 [inline]
       __do_sys_mount fs/namespace.c:4347 [inline]
       __se_sys_mount fs/namespace.c:4324 [inline]
       __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4324
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #1 (&journal->j_trans_barrier){.+.+}-{4:4}:
       down_read+0x58/0x2f8 kernel/locking/rwsem.c:1537
       ocfs2_start_trans+0x35c/0x6b0 fs/ocfs2/journal.c:372
       ocfs2_modify_bh+0xe4/0x43c fs/ocfs2/quota_local.c:101
       ocfs2_local_read_info+0x104c/0x1364 fs/ocfs2/quota_local.c:767
       dquot_load_quota_sb+0x6bc/0xa90 fs/quota/dquot.c:2459
       dquot_load_quota_inode+0x274/0x4e4 fs/quota/dquot.c:2496
       ocfs2_enable_quotas+0x17c/0x3b4 fs/ocfs2/super.c:930
       ocfs2_fill_super+0x4004/0x532c fs/ocfs2/super.c:1140
       get_tree_bdev_flags+0x360/0x414 fs/super.c:1692
       get_tree_bdev+0x2c/0x3c fs/super.c:1715
       ocfs2_get_tree+0x28/0x38 fs/ocfs2/super.c:1184
       vfs_get_tree+0x90/0x28c fs/super.c:1815
       do_new_mount+0x278/0x7f4 fs/namespace.c:3808
       path_mount+0x5b4/0xde0 fs/namespace.c:4123
       do_mount fs/namespace.c:4136 [inline]
       __do_sys_mount fs/namespace.c:4347 [inline]
       __se_sys_mount fs/namespace.c:4324 [inline]
       __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4324
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

-> #0 (sb_internal#2){.+.+}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3165 [inline]
       check_prevs_add kernel/locking/lockdep.c:3284 [inline]
       validate_chain kernel/locking/lockdep.c:3908 [inline]
       __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5237
       lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868
       percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline]
       percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
       __sb_start_write include/linux/fs.h:1799 [inline]
       sb_start_intwrite include/linux/fs.h:1982 [inline]
       ocfs2_start_trans+0x1f4/0x6b0 fs/ocfs2/journal.c:370
       ocfs2_acquire_dquot+0x594/0xa10 fs/ocfs2/quota_global.c:860
       dqget+0x654/0xccc fs/quota/dquot.c:977
       __dquot_initialize+0x2d4/0xa80 fs/quota/dquot.c:1505
       dquot_initialize+0x24/0x34 fs/quota/dquot.c:1567
       ocfs2_get_init_inode+0x134/0x1a8 fs/ocfs2/namei.c:205
       ocfs2_mknod+0x734/0x1cf0 fs/ocfs2/namei.c:313
       ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:676
       lookup_open fs/namei.c:3708 [inline]
       open_last_lookups fs/namei.c:3807 [inline]
       path_openat+0x12d8/0x2c40 fs/namei.c:4043
       do_filp_open+0x18c/0x36c fs/namei.c:4073
       do_sys_openat2+0x11c/0x1b4 fs/open.c:1435
       do_sys_open fs/open.c:1450 [inline]
       __do_sys_openat fs/open.c:1466 [inline]
       __se_sys_openat fs/open.c:1461 [inline]
       __arm64_sys_openat+0x120/0x158 fs/open.c:1461
       __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
       invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
       el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
       do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
       el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744
       el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

other info that might help us debug this:

Chain exists of:
  sb_internal#2 --> &ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE] --> &ocfs2_quota_ip_alloc_sem_key

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ocfs2_quota_ip_alloc_sem_key);
                               lock(&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]);
                               lock(&ocfs2_quota_ip_alloc_sem_key);
  rlock(sb_internal#2);

 *** DEADLOCK ***

6 locks held by syz.2.25/6790:
 #0: ffff0000dd742428 (sb_writers#11){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:557
 #1: ffff0000f5c709c0 (&type->i_mutex_dir_key#8){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:870 [inline]
 #1: ffff0000f5c709c0 (&type->i_mutex_dir_key#8){+.+.}-{4:4}, at: open_last_lookups fs/namei.c:3804 [inline]
 #1: ffff0000f5c709c0 (&type->i_mutex_dir_key#8){+.+.}-{4:4}, at: path_openat+0x638/0x2c40 fs/namei.c:4043
 #2: ffff0000f5ed2640 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:870 [inline]
 #2: ffff0000f5ed2640 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x12c/0x3b9c fs/ocfs2/suballoc.c:788
 #3: ffff0000e2a0e0a8 (&dquot->dq_lock){+.+.}-{4:4}, at: ocfs2_acquire_dquot+0x24c/0xa10 fs/ocfs2/quota_global.c:823
 #4: ffff0000f5c75f40 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:870 [inline]
 #4: ffff0000f5c75f40 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x18c/0x22c fs/ocfs2/quota_global.c:313
 #5: ffff0000f5c75be0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_lock_global_qf+0x1a8/0x22c fs/ocfs2/quota_global.c:314

stack backtrace:
CPU: 0 UID: 0 PID: 6790 Comm: syz.2.25 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 print_circular_bug+0x324/0x32c kernel/locking/lockdep.c:2043
 check_noncircular+0x154/0x174 kernel/locking/lockdep.c:2175
 check_prev_add kernel/locking/lockdep.c:3165 [inline]
 check_prevs_add kernel/locking/lockdep.c:3284 [inline]
 validate_chain kernel/locking/lockdep.c:3908 [inline]
 __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5237
 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868
 percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline]
 percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
 __sb_start_write include/linux/fs.h:1799 [inline]
 sb_start_intwrite include/linux/fs.h:1982 [inline]
 ocfs2_start_trans+0x1f4/0x6b0 fs/ocfs2/journal.c:370
 ocfs2_acquire_dquot+0x594/0xa10 fs/ocfs2/quota_global.c:860
 dqget+0x654/0xccc fs/quota/dquot.c:977
 __dquot_initialize+0x2d4/0xa80 fs/quota/dquot.c:1505
 dquot_initialize+0x24/0x34 fs/quota/dquot.c:1567
 ocfs2_get_init_inode+0x134/0x1a8 fs/ocfs2/namei.c:205
 ocfs2_mknod+0x734/0x1cf0 fs/ocfs2/namei.c:313
 ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:676
 lookup_open fs/namei.c:3708 [inline]
 open_last_lookups fs/namei.c:3807 [inline]
 path_openat+0x12d8/0x2c40 fs/namei.c:4043
 do_filp_open+0x18c/0x36c fs/namei.c:4073
 do_sys_openat2+0x11c/0x1b4 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_openat fs/open.c:1466 [inline]
 __se_sys_openat fs/open.c:1461 [inline]
 __arm64_sys_openat+0x120/0x158 fs/open.c:1461
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
(syz.2.25,6790,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0xdf8356d3, computed 0xb8c23ae4. Applying ECC.
(syz.2.25,6790,1):ocfs2_block_check_validate:416 ERROR: Fixed CRC32 failed: stored: 0xdf8356d3, computed 0x2acb7e3c
(syz.2.25,6790,1):ocfs2_read_quota_phys_block:160 ERROR: status = -5
(syz.2.25,6790,1):ocfs2_quota_read:201 ERROR: status = -5
Quota error (device loop2): find_block_dqentry: Can't read quota tree block 6
Quota error (device loop2): qtree_read_dquot: Can't read quota structure for id 0
(syz.2.25,6790,1):ocfs2_acquire_dquot:890 ERROR: status = -5
(syz.2.25,6790,1):ocfs2_mknod:317 ERROR: status = -5
(syz.2.25,6790,1):ocfs2_mknod:505 ERROR: status = -5
(syz.2.25,6790,1):ocfs2_create:678 ERROR: status = -5

Crashes (67577):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/10/08 15:56 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bf45a62baffc 7e2882b3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1 (clean fs)] [mounted in repro #2 (clean fs)] ci-upstream-gce-arm64 possible deadlock in ocfs2_acquire_dquot
2025/03/26 13:55 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a2392f333575 89d30d73 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1 (clean fs)] [mounted in repro #2 (clean fs)] ci-upstream-gce-arm64 possible deadlock in ocfs2_acquire_dquot
2024/12/16 10:42 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 2e7aff49b5da 7cbfbb3a .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci-upstream-gce-arm64 possible deadlock in ocfs2_acquire_dquot
2024/12/16 08:32 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 2e7aff49b5da 7cbfbb3a .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci-upstream-gce-arm64 possible deadlock in ocfs2_acquire_dquot
2024/12/16 05:20 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 2e7aff49b5da 7cbfbb3a .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci-upstream-gce-arm64 possible deadlock in ocfs2_acquire_dquot
2024/10/25 01:07 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ce8e69898653 9fc8fe02 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro #1] [mounted in repro #2] ci-upstream-gce-arm64 possible deadlock in ocfs2_acquire_dquot
2025/11/15 20:44 upstream 7a0892d2836e f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/15 19:40 upstream 7a0892d2836e f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/15 18:31 upstream 7a0892d2836e f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/15 16:56 upstream 7a0892d2836e f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/15 15:52 upstream 7a0892d2836e f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/15 14:46 upstream 7a0892d2836e f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/15 14:18 upstream 7a0892d2836e f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/15 13:13 upstream 7a0892d2836e f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/15 12:01 upstream 7a0892d2836e f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/15 10:00 upstream 7a0892d2836e f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/15 09:47 upstream 7a0892d2836e f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/15 08:38 upstream 7a0892d2836e f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/15 07:18 upstream d4f8cccc6230 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/15 06:47 upstream d4f8cccc6230 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/15 05:47 upstream d4f8cccc6230 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/15 04:45 upstream d4f8cccc6230 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/15 03:42 upstream d4f8cccc6230 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/15 02:33 upstream d4f8cccc6230 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/15 02:09 upstream d4f8cccc6230 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/15 01:05 upstream d4f8cccc6230 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/14 22:39 upstream d4f8cccc6230 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/14 22:35 upstream d4f8cccc6230 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/14 21:21 upstream d4f8cccc6230 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/14 20:11 upstream d4f8cccc6230 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/14 17:33 upstream 6da43bbeb691 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/14 16:25 upstream 6da43bbeb691 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/14 14:33 upstream 6da43bbeb691 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/14 12:06 upstream 6da43bbeb691 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/14 12:00 upstream 6da43bbeb691 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/14 10:59 upstream 6da43bbeb691 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/14 09:33 upstream 6da43bbeb691 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/14 07:43 upstream 6da43bbeb691 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/14 06:35 upstream 6da43bbeb691 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/11/14 05:22 upstream 2ccec5944606 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/10/28 06:14 upstream fd57572253bc fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root possible deadlock in ocfs2_acquire_dquot
2025/10/27 19:29 upstream fd57572253bc fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root possible deadlock in ocfs2_acquire_dquot
2024/09/30 00:47 upstream e7ed34365879 ba29ff75 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2024/09/26 01:36 upstream aa486552a110 0d19f247 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs possible deadlock in ocfs2_acquire_dquot
2025/08/09 00:33 linux-next b1549501188c 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root possible deadlock in ocfs2_acquire_dquot
2025/11/15 22:10 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci db9030a787e3 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ocfs2_acquire_dquot
2025/11/15 21:05 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci db9030a787e3 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ocfs2_acquire_dquot
2025/11/15 17:18 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci db9030a787e3 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ocfs2_acquire_dquot
2025/11/15 00:29 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci db9030a787e3 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ocfs2_acquire_dquot
2025/11/14 18:28 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci db9030a787e3 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ocfs2_acquire_dquot
2025/11/14 15:43 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci db9030a787e3 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ocfs2_acquire_dquot
2025/11/14 14:39 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci db9030a787e3 f7988ea4 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ocfs2_acquire_dquot
2025/11/14 13:24 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci db9030a787e3 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ocfs2_acquire_dquot
2025/11/14 08:53 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci db9030a787e3 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ocfs2_acquire_dquot
2025/11/14 07:36 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci db9030a787e3 07e030de .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 possible deadlock in ocfs2_acquire_dquot
* Struck through repros no longer work on HEAD.