ocfs2: Mounting device (7,2) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Tainted: G L ------------------------------------------------------ syz.2.792/10412 is trying to acquire lock: ffff88806bd6c610 (sb_internal#6){.+.+}-{0:0}, at: ocfs2_simple_size_update+0xd6/0x4a0 fs/ocfs2/file.c:322 but task is already holding lock: ffff88805a21ea20 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_create_local_dquot+0x1a5/0x1af0 fs/ocfs2/quota_local.c:1227 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}: down_write+0x96/0x200 kernel/locking/rwsem.c:1590 ocfs2_lock_global_qf+0x201/0x290 fs/ocfs2/quota_global.c:314 ocfs2_acquire_dquot+0x3fa/0xb30 fs/ocfs2/quota_global.c:850 dqget+0x7b1/0xf10 fs/quota/dquot.c:980 ocfs2_setattr+0xe3b/0x1cc0 fs/ocfs2/file.c:1240 notify_change+0xc1a/0xf40 fs/attr.c:556 chown_common+0x466/0x6b0 fs/open.c:778 vfs_fchown fs/open.c:843 [inline] ksys_fchown+0xe9/0x160 fs/open.c:855 __do_sys_fchown fs/open.c:860 [inline] __se_sys_fchown fs/open.c:858 [inline] __x64_sys_fchown+0x7a/0x90 fs/open.c:858 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}: down_write+0x96/0x200 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1028 [inline] ocfs2_lock_global_qf+0x1da/0x290 fs/ocfs2/quota_global.c:313 ocfs2_acquire_dquot+0x3fa/0xb30 fs/ocfs2/quota_global.c:850 dqget+0x7b1/0xf10 fs/quota/dquot.c:980 ocfs2_setattr+0xe3b/0x1cc0 fs/ocfs2/file.c:1240 notify_change+0xc1a/0xf40 fs/attr.c:556 chown_common+0x466/0x6b0 fs/open.c:778 vfs_fchown fs/open.c:843 [inline] ksys_fchown+0xe9/0x160 fs/open.c:855 __do_sys_fchown fs/open.c:860 [inline] __se_sys_fchown fs/open.c:858 [inline] __x64_sys_fchown+0x7a/0x90 fs/open.c:858 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x47/0x2e0 kernel/locking/rwsem.c:1537 ocfs2_start_trans+0x3ab/0x700 fs/ocfs2/journal.c:372 ocfs2_shutdown_local_alloc+0x1f5/0xa40 fs/ocfs2/localalloc.c:417 ocfs2_dismount_volume+0x1ec/0x900 fs/ocfs2/super.c:1825 generic_shutdown_super+0x13d/0x2d0 fs/super.c:646 kill_block_super+0x44/0x90 fs/super.c:1725 deactivate_locked_super+0xbc/0x130 fs/super.c:476 cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312 task_work_run+0x1d9/0x270 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:67 [inline] exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline] do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (sb_internal#6){.+.+}-{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+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0xf0/0x2e0 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/super.h:19 [inline] sb_start_intwrite include/linux/fs/super.h:177 [inline] ocfs2_start_trans+0x2ac/0x700 fs/ocfs2/journal.c:370 ocfs2_simple_size_update+0xd6/0x4a0 fs/ocfs2/file.c:322 ocfs2_extend_local_quota_file fs/ocfs2/quota_local.c:1126 [inline] ocfs2_create_local_dquot+0x70d/0x1af0 fs/ocfs2/quota_local.c:1230 ocfs2_acquire_dquot+0x6d7/0xb30 fs/ocfs2/quota_global.c:888 dqget+0x7b1/0xf10 fs/quota/dquot.c:980 ocfs2_setattr+0xe3b/0x1cc0 fs/ocfs2/file.c:1240 notify_change+0xc1a/0xf40 fs/attr.c:556 chown_common+0x466/0x6b0 fs/open.c:778 vfs_fchown fs/open.c:843 [inline] ksys_fchown+0xe9/0x160 fs/open.c:855 __do_sys_fchown fs/open.c:860 [inline] __se_sys_fchown fs/open.c:858 [inline] __x64_sys_fchown+0x7a/0x90 fs/open.c:858 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f other info that might help us debug this: Chain exists of: sb_internal#6 --> &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#6); *** DEADLOCK *** 4 locks held by syz.2.792/10412: #0: ffff88806bd6c420 (sb_writers#30){.+.+}-{0:0}, at: mnt_want_write_file+0x60/0x200 fs/namespace.c:537 #1: ffff88805830a640 (&type->i_mutex_dir_key#20){+.+.}-{4:4}, at: inode_lock_killable include/linux/fs.h:1033 [inline] #1: ffff88805830a640 (&type->i_mutex_dir_key#20){+.+.}-{4:4}, at: chown_common+0x35e/0x6b0 fs/open.c:766 #2: ffff88804e5f56a8 (&dquot->dq_lock){+.+.}-{4:4}, at: ocfs2_acquire_dquot+0x271/0xb30 fs/ocfs2/quota_global.c:823 #3: ffff88805a21ea20 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_create_local_dquot+0x1a5/0x1af0 fs/ocfs2/quota_local.c:1227 stack backtrace: CPU: 0 UID: 0 PID: 10412 Comm: syz.2.792 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_circular_bug+0x2e1/0x300 kernel/locking/lockdep.c:2043 check_noncircular+0x12e/0x150 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+0x15a5/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0xf0/0x2e0 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/super.h:19 [inline] sb_start_intwrite include/linux/fs/super.h:177 [inline] ocfs2_start_trans+0x2ac/0x700 fs/ocfs2/journal.c:370 ocfs2_simple_size_update+0xd6/0x4a0 fs/ocfs2/file.c:322 ocfs2_extend_local_quota_file fs/ocfs2/quota_local.c:1126 [inline] ocfs2_create_local_dquot+0x70d/0x1af0 fs/ocfs2/quota_local.c:1230 ocfs2_acquire_dquot+0x6d7/0xb30 fs/ocfs2/quota_global.c:888 dqget+0x7b1/0xf10 fs/quota/dquot.c:980 ocfs2_setattr+0xe3b/0x1cc0 fs/ocfs2/file.c:1240 notify_change+0xc1a/0xf40 fs/attr.c:556 chown_common+0x466/0x6b0 fs/open.c:778 vfs_fchown fs/open.c:843 [inline] ksys_fchown+0xe9/0x160 fs/open.c:855 __do_sys_fchown fs/open.c:860 [inline] __se_sys_fchown fs/open.c:858 [inline] __x64_sys_fchown+0x7a/0x90 fs/open.c:858 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc1ad19af79 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fc1ae079028 EFLAGS: 00000246 ORIG_RAX: 000000000000005d RAX: ffffffffffffffda RBX: 00007fc1ad415fa0 RCX: 00007fc1ad19af79 RDX: 000000000000000a RSI: 000000003a736e6f RDI: 0000000000000004 RBP: 00007fc1ad2316e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc1ad416038 R14: 00007fc1ad415fa0 R15: 00007ffc8f3f7618 ocfs2: Unmounting device (7,2) on (node local)