ocfs2: Mounting device (7,1) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.1.168/6797 is trying to acquire lock: ffff8880619207d0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_lock_global_qf+0x1e8/0x270 fs/ocfs2/quota_global.c:314 but task is already holding lock: ffff888061920b80 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline] ffff888061920b80 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x1ca/0x270 fs/ocfs2/quota_global.c:313 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}: down_write+0x3a/0x50 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1027 [inline] ocfs2_lock_global_qf+0x1ca/0x270 fs/ocfs2/quota_global.c:313 ocfs2_acquire_dquot+0x2a0/0xb10 fs/ocfs2/quota_global.c:828 dqget+0x7b6/0xf10 fs/quota/dquot.c:980 __dquot_initialize+0x3b3/0xcb0 fs/quota/dquot.c:1508 ocfs2_get_init_inode+0x13b/0x1b0 fs/ocfs2/namei.c:205 ocfs2_mknod+0x858/0x2030 fs/ocfs2/namei.c:313 ocfs2_mkdir+0x181/0x420 fs/ocfs2/namei.c:659 vfs_mkdir+0x52d/0x5d0 fs/namei.c:5130 do_mkdirat+0x27a/0x4b0 fs/namei.c:5164 __do_sys_mkdirat fs/namei.c:5186 [inline] __se_sys_mkdirat fs/namei.c:5184 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:5184 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #3 (&dquot->dq_lock){+.+.}-{4:4}: __mutex_lock_common kernel/locking/rtmutex_api.c:533 [inline] mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:552 wait_on_dquot fs/quota/dquot.c:357 [inline] dqget+0x72f/0xf10 fs/quota/dquot.c:975 __dquot_initialize+0x3b3/0xcb0 fs/quota/dquot.c:1508 ocfs2_get_init_inode+0x13b/0x1b0 fs/ocfs2/namei.c:205 ocfs2_mknod+0x858/0x2030 fs/ocfs2/namei.c:313 ocfs2_mkdir+0x181/0x420 fs/ocfs2/namei.c:659 vfs_mkdir+0x52d/0x5d0 fs/namei.c:5130 do_mkdirat+0x27a/0x4b0 fs/namei.c:5164 __do_sys_mkdirat fs/namei.c:5186 [inline] __se_sys_mkdirat fs/namei.c:5184 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:5184 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #2 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}: down_write+0x3a/0x50 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1027 [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+0x1507/0x4020 fs/ocfs2/inode.c:1297 evict+0x5f4/0xae0 fs/inode.c:837 do_unlinkat+0x340/0x570 fs/namei.c:5443 __do_sys_unlinkat fs/namei.c:5469 [inline] __se_sys_unlinkat fs/namei.c:5462 [inline] __x64_sys_unlinkat+0xd3/0xf0 fs/namei.c:5462 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #1 (&ocfs2_sysfile_lock_key[ORPHAN_DIR_SYSTEM_INODE]){+.+.}-{4:4}: down_write+0x3a/0x50 kernel/locking/rwsem.c:1590 inode_lock include/linux/fs.h:1027 [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+0x25e/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:4234 __generic_file_write_iter+0x120/0x240 mm/filemap.c:4403 ocfs2_file_write_iter+0x1585/0x1d00 fs/ocfs2/file.c:2469 iter_file_splice_write+0x977/0x10b0 fs/splice.c:738 do_splice_from fs/splice.c:938 [inline] direct_splice_actor+0x104/0x160 fs/splice.c:1161 splice_direct_to_actor+0x5b3/0xcd0 fs/splice.c:1105 do_splice_direct_actor fs/splice.c:1204 [inline] do_splice_direct+0x187/0x270 fs/splice.c:1230 do_sendfile+0x4ec/0x7f0 fs/read_write.c:1370 __do_sys_sendfile64 fs/read_write.c:1431 [inline] __se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1417 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ocfs2_quota_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+0x15a6/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x117/0x340 kernel/locking/lockdep.c:5868 down_write+0x3a/0x50 kernel/locking/rwsem.c:1590 ocfs2_lock_global_qf+0x1e8/0x270 fs/ocfs2/quota_global.c:314 ocfs2_acquire_dquot+0x2a0/0xb10 fs/ocfs2/quota_global.c:828 dqget+0x7b6/0xf10 fs/quota/dquot.c:980 __dquot_initialize+0x3b3/0xcb0 fs/quota/dquot.c:1508 ocfs2_get_init_inode+0x13b/0x1b0 fs/ocfs2/namei.c:205 ocfs2_mknod+0x858/0x2030 fs/ocfs2/namei.c:313 ocfs2_mkdir+0x181/0x420 fs/ocfs2/namei.c:659 vfs_mkdir+0x52d/0x5d0 fs/namei.c:5130 do_mkdirat+0x27a/0x4b0 fs/namei.c:5164 __do_sys_mkdirat fs/namei.c:5186 [inline] __se_sys_mkdirat fs/namei.c:5184 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:5184 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/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: &ocfs2_quota_ip_alloc_sem_key --> &dquot->dq_lock --> &ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE] Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]); lock(&dquot->dq_lock); lock(&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]); lock(&ocfs2_quota_ip_alloc_sem_key); *** DEADLOCK *** 5 locks held by syz.1.168/6797: #0: ffff8880277e2480 (sb_writers#22){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:499 #1: ffff88805f1b0b80 (&type->i_mutex_dir_key#14/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1072 [inline] #1: ffff88805f1b0b80 (&type->i_mutex_dir_key#14/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2864 [inline] #1: ffff88805f1b0b80 (&type->i_mutex_dir_key#14/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2875 [inline] #1: ffff88805f1b0b80 (&type->i_mutex_dir_key#14/1){+.+.}-{4:4}, at: filename_create+0x1fb/0x360 fs/namei.c:4879 #2: ffff88805f132d00 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline] #2: ffff88805f132d00 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x45b0 fs/ocfs2/suballoc.c:788 #3: ffff88803ee40098 (&dquot->dq_lock){+.+.}-{4:4}, at: ocfs2_acquire_dquot+0x293/0xb10 fs/ocfs2/quota_global.c:823 #4: ffff888061920b80 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline] #4: ffff888061920b80 (&ocfs2_sysfile_lock_key[USER_QUOTA_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x1ca/0x270 fs/ocfs2/quota_global.c:313 stack backtrace: CPU: 1 UID: 0 PID: 6797 Comm: syz.1.168 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_circular_bug+0x2e2/0x300 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+0x15a6/0x2cf0 kernel/locking/lockdep.c:5237 lock_acquire+0x117/0x340 kernel/locking/lockdep.c:5868 down_write+0x3a/0x50 kernel/locking/rwsem.c:1590 ocfs2_lock_global_qf+0x1e8/0x270 fs/ocfs2/quota_global.c:314 ocfs2_acquire_dquot+0x2a0/0xb10 fs/ocfs2/quota_global.c:828 dqget+0x7b6/0xf10 fs/quota/dquot.c:980 __dquot_initialize+0x3b3/0xcb0 fs/quota/dquot.c:1508 ocfs2_get_init_inode+0x13b/0x1b0 fs/ocfs2/namei.c:205 ocfs2_mknod+0x858/0x2030 fs/ocfs2/namei.c:313 ocfs2_mkdir+0x181/0x420 fs/ocfs2/namei.c:659 vfs_mkdir+0x52d/0x5d0 fs/namei.c:5130 do_mkdirat+0x27a/0x4b0 fs/namei.c:5164 __do_sys_mkdirat fs/namei.c:5186 [inline] __se_sys_mkdirat fs/namei.c:5184 [inline] __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:5184 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5f4216de97 Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 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:00007f5f403cde68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f5f403cdef0 RCX: 00007f5f4216de97 RDX: 00000000000001ff RSI: 0000200000000180 RDI: 00000000ffffff9c RBP: 00002000000002c0 R08: 00002000000007c0 R09: 0000000000000000 R10: 00002000000002c0 R11: 0000000000000246 R12: 0000200000000180 R13: 00007f5f403cdeb0 R14: 0000000000000000 R15: 0000000000000000