====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.8.1451/17478 is trying to acquire lock: ffff88803e713e80 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:870 [inline] ffff88803e713e80 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_del_inode_from_orphan+0x134/0x740 fs/ocfs2/namei.c:2730 but task is already holding lock: ffff8880671bdcd0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_dio_end_io_write fs/ocfs2/aops.c:2298 [inline] ffff8880671bdcd0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_dio_end_io+0x38b/0x1100 fs/ocfs2/aops.c:2404 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}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 down_write+0x3a/0x50 kernel/locking/rwsem.c:1590 ocfs2_create_local_dquot+0x19d/0x1a40 fs/ocfs2/quota_local.c:1227 ocfs2_acquire_dquot+0x80f/0xb30 fs/ocfs2/quota_global.c:883 dqget+0x7c1/0xf20 fs/quota/dquot.c:977 ocfs2_setattr+0xd72/0x1b40 fs/ocfs2/file.c:1233 notify_change+0xb31/0xe60 fs/attr.c:552 chown_common+0x40c/0x5c0 fs/open.c:791 vfs_fchown fs/open.c:859 [inline] ksys_fchown+0xea/0x160 fs/open.c:871 __do_sys_fchown fs/open.c:876 [inline] __se_sys_fchown fs/open.c:874 [inline] __x64_sys_fchown+0x7a/0x90 fs/open.c:874 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&dquot->dq_lock){+.+.}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 __mutex_lock_common kernel/locking/rtmutex_api.c:535 [inline] mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:547 wait_on_dquot fs/quota/dquot.c:354 [inline] dqget+0x73a/0xf20 fs/quota/dquot.c:972 __dquot_initialize+0x3b3/0xcb0 fs/quota/dquot.c:1505 ocfs2_get_init_inode+0x13b/0x1b0 fs/ocfs2/namei.c:205 ocfs2_mknod+0x863/0x2050 fs/ocfs2/namei.c:313 ocfs2_create+0x1a5/0x440 fs/ocfs2/namei.c:676 lookup_open fs/namei.c:3708 [inline] open_last_lookups fs/namei.c:3807 [inline] path_openat+0x14fd/0x3840 fs/namei.c:4043 do_filp_open+0x1fa/0x410 fs/namei.c:4073 do_sys_openat2+0x121/0x1c0 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] __x64_sys_openat+0x138/0x170 fs/open.c:1461 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}: lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 down_write+0x3a/0x50 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:870 [inline] ocfs2_remove_inode fs/ocfs2/inode.c:731 [inline] ocfs2_wipe_inode fs/ocfs2/inode.c:894 [inline] ocfs2_delete_inode fs/ocfs2/inode.c:1155 [inline] ocfs2_evict_inode+0x153d/0x40d0 fs/ocfs2/inode.c:1295 evict+0x504/0x9c0 fs/inode.c:810 ocfs2_dentry_iput+0x247/0x370 fs/ocfs2/dcache.c:407 __dentry_kill+0x209/0x660 fs/dcache.c:669 dput+0x19f/0x2b0 fs/dcache.c:911 __fput+0x69d/0xa80 fs/file_table.c:476 task_work_run+0x1d4/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain+0xb9b/0x2140 kernel/locking/lockdep.c:3908 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 down_write+0x3a/0x50 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:870 [inline] ocfs2_del_inode_from_orphan+0x134/0x740 fs/ocfs2/namei.c:2730 ocfs2_dio_end_io_write fs/ocfs2/aops.c:2306 [inline] ocfs2_dio_end_io+0x47b/0x1100 fs/ocfs2/aops.c:2404 dio_complete+0x25b/0x790 fs/direct-io.c:281 __blockdev_direct_IO+0x2bc0/0x31f0 fs/direct-io.c:1303 ocfs2_direct_IO+0x260/0x2d0 fs/ocfs2/aops.c:2441 generic_file_direct_write+0x1dc/0x3e0 mm/filemap.c:4109 __generic_file_write_iter+0x120/0x240 mm/filemap.c:4278 ocfs2_file_write_iter+0x157d/0x1d20 fs/ocfs2/file.c:2469 do_iter_readv_writev+0x62e/0x8d0 fs/read_write.c:-1 vfs_writev+0x323/0x970 fs/read_write.c:1057 do_writev+0x153/0x2d0 fs/read_write.c:1103 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 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: &ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE] --> &dquot->dq_lock --> &ocfs2_quota_ip_alloc_sem_key Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_quota_ip_alloc_sem_key); lock(&dquot->dq_lock); lock(&ocfs2_quota_ip_alloc_sem_key); lock(&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]); *** DEADLOCK *** 4 locks held by syz.8.1451/17478: #0: ffff888030d66528 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x253/0x320 fs/file.c:1232 #1: ffff88802f962488 (sb_writers#22){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3108 [inline] #1: ffff88802f962488 (sb_writers#22){.+.+}-{0:0}, at: vfs_writev+0x28e/0x970 fs/read_write.c:1055 #2: ffff8880671be080 (&sb->s_type->i_mutex_key#27){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:870 [inline] #2: ffff8880671be080 (&sb->s_type->i_mutex_key#27){+.+.}-{4:4}, at: ocfs2_file_write_iter+0x42c/0x1d20 fs/ocfs2/file.c:2399 #3: ffff8880671bdcd0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_dio_end_io_write fs/ocfs2/aops.c:2298 [inline] #3: ffff8880671bdcd0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_dio_end_io+0x38b/0x1100 fs/ocfs2/aops.c:2404 stack backtrace: CPU: 0 UID: 0 PID: 17478 Comm: syz.8.1451 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2ee/0x310 kernel/locking/lockdep.c:2043 check_noncircular+0x134/0x160 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+0xb9b/0x2140 kernel/locking/lockdep.c:3908 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868 down_write+0x3a/0x50 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:870 [inline] ocfs2_del_inode_from_orphan+0x134/0x740 fs/ocfs2/namei.c:2730 ocfs2_dio_end_io_write fs/ocfs2/aops.c:2306 [inline] ocfs2_dio_end_io+0x47b/0x1100 fs/ocfs2/aops.c:2404 dio_complete+0x25b/0x790 fs/direct-io.c:281 __blockdev_direct_IO+0x2bc0/0x31f0 fs/direct-io.c:1303 ocfs2_direct_IO+0x260/0x2d0 fs/ocfs2/aops.c:2441 generic_file_direct_write+0x1dc/0x3e0 mm/filemap.c:4109 __generic_file_write_iter+0x120/0x240 mm/filemap.c:4278 ocfs2_file_write_iter+0x157d/0x1d20 fs/ocfs2/file.c:2469 do_iter_readv_writev+0x62e/0x8d0 fs/read_write.c:-1 vfs_writev+0x323/0x970 fs/read_write.c:1057 do_writev+0x153/0x2d0 fs/read_write.c:1103 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f69c918eec9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f69c73f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007f69c93e5fa0 RCX: 00007f69c918eec9 RDX: 0000000000000001 RSI: 0000200000000140 RDI: 0000000000000005 RBP: 00007f69c9211f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f69c93e6038 R14: 00007f69c93e5fa0 R15: 00007ffec7394488