====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ kworker/u8:4/61 is trying to acquire lock: ffff88805b813f60 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xb6/0x340 fs/ocfs2/refcounttree.c:933 but task is already holding lock: ffff88805b813ff8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xa4/0x340 fs/ocfs2/refcounttree.c:932 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&oi->ip_xattr_sem){++++}-{4:4}: down_read+0x47/0x2e0 kernel/locking/rwsem.c:1537 ocfs2_init_acl+0x2fd/0x7e0 fs/ocfs2/acl.c:367 ocfs2_mknod+0x1679/0x2290 fs/ocfs2/namei.c:414 ocfs2_create+0x195/0x490 fs/ocfs2/namei.c:677 lookup_open fs/namei.c:4483 [inline] open_last_lookups fs/namei.c:4583 [inline] path_openat+0x1395/0x3860 fs/namei.c:4827 do_file_open+0x23e/0x4a0 fs/namei.c:4859 do_sys_openat2+0x113/0x200 fs/open.c:1366 do_sys_open fs/open.c:1372 [inline] __do_sys_open fs/open.c:1380 [inline] __se_sys_open fs/open.c:1376 [inline] __x64_sys_open+0x11e/0x150 fs/open.c:1376 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 (&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_mknod+0x1181/0x2290 fs/ocfs2/namei.c:365 ocfs2_create+0x195/0x490 fs/ocfs2/namei.c:677 lookup_open fs/namei.c:4483 [inline] open_last_lookups fs/namei.c:4583 [inline] path_openat+0x1395/0x3860 fs/namei.c:4827 do_file_open+0x23e/0x4a0 fs/namei.c:4859 do_sys_openat2+0x113/0x200 fs/open.c:1366 do_sys_open fs/open.c:1372 [inline] __do_sys_open fs/open.c:1380 [inline] __se_sys_open fs/open.c:1376 [inline] __x64_sys_open+0x11e/0x150 fs/open.c:1376 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 (sb_internal#2){.+.+}-{0:0}: 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_orphan_for_truncate fs/ocfs2/file.c:397 [inline] ocfs2_truncate_file+0x631/0x1540 fs/ocfs2/file.c:501 ocfs2_recover_orphans fs/ocfs2/journal.c:2335 [inline] ocfs2_complete_recovery+0x128e/0x2310 fs/ocfs2/journal.c:1366 process_one_work+0x949/0x1650 kernel/workqueue.c:3279 process_scheduled_works kernel/workqueue.c:3362 [inline] worker_thread+0xb46/0x1140 kernel/workqueue.c:3443 kthread+0x388/0x470 kernel/kthread.c:467 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 -> #0 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}: 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 down_write+0x96/0x200 kernel/locking/rwsem.c:1590 ocfs2_try_remove_refcount_tree+0xb6/0x340 fs/ocfs2/refcounttree.c:933 ocfs2_truncate_file+0xdf3/0x1540 fs/ocfs2/file.c:522 ocfs2_recover_orphans fs/ocfs2/journal.c:2335 [inline] ocfs2_complete_recovery+0x128e/0x2310 fs/ocfs2/journal.c:1366 process_one_work+0x949/0x1650 kernel/workqueue.c:3279 process_scheduled_works kernel/workqueue.c:3362 [inline] worker_thread+0xb46/0x1140 kernel/workqueue.c:3443 kthread+0x388/0x470 kernel/kthread.c:467 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 other info that might help us debug this: Chain exists of: &ocfs2_file_ip_alloc_sem_key --> &journal->j_trans_barrier --> &oi->ip_xattr_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&oi->ip_xattr_sem); lock(&journal->j_trans_barrier); lock(&oi->ip_xattr_sem); lock(&ocfs2_file_ip_alloc_sem_key); *** DEADLOCK *** 4 locks held by kworker/u8:4/61: #0: ffff888029411148 ((wq_completion)ocfs2_wq){+.+.}-{0:0}, at: process_one_work+0x855/0x1650 kernel/workqueue.c:3254 #1: ffffc900015f7c40 ((work_completion)(&journal->j_recovery_work)){+.+.}-{0:0}, at: process_one_work+0x87c/0x1650 kernel/workqueue.c:3255 #2: ffff88805b8142c0 (&sb->s_type->i_mutex_key#25){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1028 [inline] #2: ffff88805b8142c0 (&sb->s_type->i_mutex_key#25){+.+.}-{4:4}, at: ocfs2_recover_orphans fs/ocfs2/journal.c:2316 [inline] #2: ffff88805b8142c0 (&sb->s_type->i_mutex_key#25){+.+.}-{4:4}, at: ocfs2_complete_recovery+0xff4/0x2310 fs/ocfs2/journal.c:1366 #3: ffff88805b813ff8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xa4/0x340 fs/ocfs2/refcounttree.c:932 stack backtrace: CPU: 0 UID: 0 PID: 61 Comm: kworker/u8:4 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 Workqueue: ocfs2_wq ocfs2_complete_recovery 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 down_write+0x96/0x200 kernel/locking/rwsem.c:1590 ocfs2_try_remove_refcount_tree+0xb6/0x340 fs/ocfs2/refcounttree.c:933 ocfs2_truncate_file+0xdf3/0x1540 fs/ocfs2/file.c:522 ocfs2_recover_orphans fs/ocfs2/journal.c:2335 [inline] ocfs2_complete_recovery+0x128e/0x2310 fs/ocfs2/journal.c:1366 process_one_work+0x949/0x1650 kernel/workqueue.c:3279 process_scheduled_works kernel/workqueue.c:3362 [inline] worker_thread+0xb46/0x1140 kernel/workqueue.c:3443 kthread+0x388/0x470 kernel/kthread.c:467 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245