ocfs2: Mounting device (7,9) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.9.584/6654 is trying to acquire lock: ffff8880511f42c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:764 [inline] ffff8880511f42c8 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: ocfs2_remove_btree_range+0x64f/0x15e0 fs/ocfs2/alloc.c:5742 but task is already holding lock: ffff8880511f6a20 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: __ocfs2_change_file_space+0x719/0xf60 fs/ocfs2/file.c:2015 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}: down_write+0x36/0x60 kernel/locking/rwsem.c:1573 ocfs2_create_local_dquot+0x19a/0x1900 fs/ocfs2/quota_local.c:1224 ocfs2_acquire_dquot+0x7e6/0xb80 fs/ocfs2/quota_global.c:871 dqget+0x713/0xbb0 fs/quota/dquot.c:1013 __dquot_initialize+0x3a9/0xd00 fs/quota/dquot.c:1542 ocfs2_get_init_inode+0x144/0x1b0 fs/ocfs2/namei.c:202 ocfs2_mknod+0xbe8/0x25e0 fs/ocfs2/namei.c:311 ocfs2_create+0x1b6/0x4b0 fs/ocfs2/namei.c:681 lookup_open fs/namei.c:3533 [inline] open_last_lookups fs/namei.c:3601 [inline] path_openat+0x11b9/0x2f10 fs/namei.c:3831 do_filp_open+0x1ee/0x420 fs/namei.c:3861 do_sys_openat2+0x14b/0x4f0 fs/open.c:1320 do_sys_open fs/open.c:1336 [inline] __do_sys_openat fs/open.c:1352 [inline] __se_sys_openat fs/open.c:1347 [inline] __x64_sys_openat+0x135/0x160 fs/open.c:1347 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #3 (&dquot->dq_lock){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:603 [inline] __mutex_lock+0x12d/0xae0 kernel/locking/mutex.c:747 dquot_commit+0x5a/0x410 fs/quota/dquot.c:535 ext4_write_dquot+0x1f0/0x360 fs/ext4/super.c:6817 mark_dquot_dirty fs/quota/dquot.c:400 [inline] mark_all_dquot_dirty+0x1e3/0x400 fs/quota/dquot.c:440 __dquot_alloc_space+0x5f6/0xe50 fs/quota/dquot.c:1777 dquot_alloc_space_nodirty include/linux/quotaops.h:293 [inline] dquot_alloc_space include/linux/quotaops.h:306 [inline] dquot_alloc_block include/linux/quotaops.h:330 [inline] ext4_mb_new_blocks+0xf55/0x44d0 fs/ext4/mballoc.c:5740 ext4_ext_map_blocks+0x18d1/0x6640 fs/ext4/extents.c:4361 ext4_map_blocks+0x9d7/0x1a90 fs/ext4/inode.c:681 ext4_getblk+0x1c5/0x720 fs/ext4/inode.c:892 ext4_bread+0x26/0x170 fs/ext4/inode.c:948 ext4_append+0x2bb/0x560 fs/ext4/namei.c:83 ext4_init_new_dir+0x2b8/0x550 fs/ext4/namei.c:3032 ext4_mkdir+0x4c3/0xc90 fs/ext4/namei.c:3078 vfs_mkdir+0x386/0x570 fs/namei.c:4157 do_mkdirat+0x1d8/0x440 fs/namei.c:4182 __do_sys_mkdir fs/namei.c:4202 [inline] __se_sys_mkdir fs/namei.c:4200 [inline] __x64_sys_mkdir+0x6a/0x80 fs/namei.c:4200 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #2 (&ei->i_data_sem){++++}-{3:3}: down_write+0x36/0x60 kernel/locking/rwsem.c:1573 ext4_map_blocks+0x914/0x1a90 fs/ext4/inode.c:674 mpage_map_one_extent fs/ext4/inode.c:2436 [inline] mpage_map_and_submit_extent fs/ext4/inode.c:2489 [inline] ext4_writepages+0x12aa/0x2e70 fs/ext4/inode.c:2857 do_writepages+0x3c6/0x640 mm/page-writeback.c:2491 __writeback_single_inode+0x153/0x1170 fs/fs-writeback.c:1673 writeback_sb_inodes+0xad5/0x17f0 fs/fs-writeback.c:1964 __writeback_inodes_wb+0x12a/0x3f0 fs/fs-writeback.c:2035 wb_writeback+0x484/0xd40 fs/fs-writeback.c:2140 wb_check_background_flush fs/fs-writeback.c:2206 [inline] wb_do_writeback fs/fs-writeback.c:2294 [inline] wb_workfn+0xc1c/0xee0 fs/fs-writeback.c:2321 process_one_work+0x8ab/0x1160 kernel/workqueue.c:2292 worker_thread+0xaf5/0x12a0 kernel/workqueue.c:2439 kthread+0x29d/0x330 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 -> #1 (jbd2_handle){++++}-{0:0}: jbd2_journal_lock_updates+0xa8/0x390 fs/jbd2/transaction.c:880 __ocfs2_flush_truncate_log+0x2cf/0x1220 fs/ocfs2/alloc.c:6029 ocfs2_flush_truncate_log+0x4b/0x60 fs/ocfs2/alloc.c:6076 ocfs2_sync_fs+0x119/0x330 fs/ocfs2/super.c:402 sync_filesystem+0x1be/0x220 fs/sync.c:66 generic_shutdown_super+0x6b/0x340 fs/super.c:474 kill_block_super+0x7c/0xe0 fs/super.c:1481 deactivate_locked_super+0x93/0xf0 fs/super.c:332 cleanup_mnt+0x471/0x4f0 fs/namespace.c:1191 task_work_run+0x1d0/0x260 kernel/task_work.c:203 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:180 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:213 __syscall_exit_to_user_mode_work kernel/entry/common.c:295 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:306 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x68/0xd2 -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3095 [inline] check_prevs_add kernel/locking/lockdep.c:3214 [inline] validate_chain kernel/locking/lockdep.c:3830 [inline] __lock_acquire+0x2d18/0x7c40 kernel/locking/lockdep.c:5063 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5678 down_write+0x36/0x60 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:764 [inline] ocfs2_remove_btree_range+0x64f/0x15e0 fs/ocfs2/alloc.c:5742 ocfs2_remove_inode_range+0xfc5/0x2870 fs/ocfs2/file.c:1907 __ocfs2_change_file_space+0x853/0xf60 fs/ocfs2/file.c:2028 ocfs2_fallocate+0x1ee/0x240 fs/ocfs2/file.c:2138 vfs_fallocate+0x57b/0x6f0 fs/open.c:323 ioctl_preallocate fs/ioctl.c:290 [inline] file_ioctl fs/ioctl.c:333 [inline] do_vfs_ioctl+0x1a2e/0x1d40 fs/ioctl.c:849 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl+0x83/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 other info that might help us debug this: Chain exists of: &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5 --> &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[args->fi_sysfile_type]#5); *** DEADLOCK *** 3 locks held by syz.9.584/6654: #0: ffff88805d398460 (sb_writers#21){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3026 [inline] #0: ffff88805d398460 (sb_writers#21){.+.+}-{0:0}, at: vfs_fallocate+0x4ee/0x6f0 fs/open.c:322 #1: ffff8880511f6d88 (&sb->s_type->i_mutex_key#27){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:764 [inline] #1: ffff8880511f6d88 (&sb->s_type->i_mutex_key#27){+.+.}-{3:3}, at: __ocfs2_change_file_space+0x1d8/0xf60 fs/ocfs2/file.c:1949 #2: ffff8880511f6a20 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: __ocfs2_change_file_space+0x719/0xf60 fs/ocfs2/file.c:2015 stack backtrace: CPU: 1 PID: 6654 Comm: syz.9.584 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106 check_noncircular+0x296/0x330 kernel/locking/lockdep.c:2170 check_prev_add kernel/locking/lockdep.c:3095 [inline] check_prevs_add kernel/locking/lockdep.c:3214 [inline] validate_chain kernel/locking/lockdep.c:3830 [inline] __lock_acquire+0x2d18/0x7c40 kernel/locking/lockdep.c:5063 lock_acquire+0x1bb/0x4a0 kernel/locking/lockdep.c:5678 down_write+0x36/0x60 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:764 [inline] ocfs2_remove_btree_range+0x64f/0x15e0 fs/ocfs2/alloc.c:5742 ocfs2_remove_inode_range+0xfc5/0x2870 fs/ocfs2/file.c:1907 __ocfs2_change_file_space+0x853/0xf60 fs/ocfs2/file.c:2028 ocfs2_fallocate+0x1ee/0x240 fs/ocfs2/file.c:2138 vfs_fallocate+0x57b/0x6f0 fs/open.c:323 ioctl_preallocate fs/ioctl.c:290 [inline] file_ioctl fs/ioctl.c:333 [inline] do_vfs_ioctl+0x1a2e/0x1d40 fs/ioctl.c:849 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl+0x83/0x170 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f64a9b9e159 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:00007f64a7df6028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f64a9e25fa0 RCX: 00007f64a9b9e159 RDX: 0000200000000140 RSI: 0000000040305829 RDI: 0000000000000007 RBP: 00007f64a9c3503b R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f64a9e26038 R14: 00007f64a9e25fa0 R15: 00007ffc45672608 ocfs2: Unmounting device (7,9) on (node local)