ocfs2: Mounting device (7,8) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.8.1370/10995 is trying to acquire lock: ffff888062226a20 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_lock_global_qf+0x1e5/0x270 fs/ocfs2/quota_global.c:314 but task is already holding lock: ffff888062226d88 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] ffff888062226d88 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}, at: ocfs2_lock_global_qf+0x1c7/0x270 fs/ocfs2/quota_global.c:313 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #6 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}: down_write+0x38/0x60 kernel/locking/rwsem.c:1551 inode_lock include/linux/fs.h:787 [inline] ocfs2_lock_global_qf+0x1c7/0x270 fs/ocfs2/quota_global.c:313 ocfs2_acquire_dquot+0x29d/0xaf0 fs/ocfs2/quota_global.c:816 dqget+0x778/0xeb0 fs/quota/dquot.c:988 __dquot_initialize+0x3b6/0xcb0 fs/quota/dquot.c:1517 ocfs2_get_init_inode+0x138/0x1b0 fs/ocfs2/namei.c:202 ocfs2_mknod+0x8aa/0x22b0 fs/ocfs2/namei.c:310 ocfs2_mkdir+0x192/0x410 fs/ocfs2/namei.c:657 vfs_mkdir+0x387/0x570 fs/namei.c:4073 do_mkdirat+0x1d7/0x5a0 fs/namei.c:4098 __do_sys_mkdirat fs/namei.c:4113 [inline] __se_sys_mkdirat fs/namei.c:4111 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4111 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #5 (&dquot->dq_lock){+.+.}-{3:3}: __mutex_lock_common+0x1eb/0x2390 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 dquot_commit+0x5a/0x410 fs/quota/dquot.c:507 ext4_write_dquot+0x1f0/0x360 fs/ext4/super.c:6185 mark_dquot_dirty fs/quota/dquot.c:372 [inline] mark_all_dquot_dirty+0xf9/0x400 fs/quota/dquot.c:412 __dquot_alloc_space+0x5d0/0xe20 fs/quota/dquot.c:1752 dquot_alloc_space_nodirty include/linux/quotaops.h:297 [inline] dquot_alloc_space include/linux/quotaops.h:310 [inline] dquot_alloc_block include/linux/quotaops.h:334 [inline] ext4_mb_new_blocks+0xf68/0x4940 fs/ext4/mballoc.c:5734 ext4_ext_map_blocks+0x191a/0x6650 fs/ext4/extents.c:4341 ext4_map_blocks+0x981/0x1b30 fs/ext4/inode.c:673 _ext4_get_block+0x1d7/0x4e0 fs/ext4/inode.c:816 __block_write_begin_int+0x54e/0x15a0 fs/buffer.c:2012 ext4_convert_inline_data_to_extent fs/ext4/ext4_jbd2.h:-1 [inline] ext4_try_to_write_inline_data+0x7bd/0x14c0 fs/ext4/inline.c:750 ext4_write_begin+0x268/0x15c0 fs/ext4/inode.c:1181 generic_perform_write+0x2aa/0x530 mm/filemap.c:3785 ext4_buffered_write_iter+0x25f/0x3b0 fs/ext4/file.c:268 ext4_file_write_iter+0x773/0x17b0 fs/ext4/file.c:-1 __kernel_write+0x4f9/0x930 fs/read_write.c:539 __dump_emit+0x243/0x360 fs/coredump.c:943 elf_core_dump+0x29e8/0x3530 fs/binfmt_elf.c:2264 do_coredump+0x1419/0x2960 fs/coredump.c:894 get_signal+0x40a/0x12c0 kernel/signal.c:2886 arch_do_signal_or_restart+0xc1/0x1300 arch/x86/kernel/signal.c:867 handle_signal_work kernel/entry/common.c:154 [inline] exit_to_user_mode_loop+0x9e/0x130 kernel/entry/common.c:178 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214 irqentry_exit_to_user_mode+0x5/0x30 kernel/entry/common.c:320 exc_page_fault+0x88/0x100 arch/x86/mm/fault.c:1504 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:606 -> #4 (&ei->i_data_sem){++++}-{3:3}: down_write+0x38/0x60 kernel/locking/rwsem.c:1551 ext4_truncate+0x96d/0x10d0 fs/ext4/inode.c:4251 ext4_setattr+0xffe/0x19e0 fs/ext4/inode.c:5597 notify_change+0xbcd/0xee0 fs/attr.c:505 do_truncate+0x197/0x220 fs/open.c:65 do_sys_ftruncate+0x31b/0x3d0 fs/open.c:193 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #3 (jbd2_handle){++++}-{0:0}: start_this_handle+0x1338/0x15a0 fs/jbd2/transaction.c:464 jbd2__journal_start+0x2b7/0x5a0 fs/jbd2/transaction.c:521 jbd2_journal_start+0x26/0x30 fs/jbd2/transaction.c:560 ocfs2_start_trans+0x374/0x6c0 fs/ocfs2/journal.c:376 ocfs2_shutdown_local_alloc+0x1fd/0xa10 fs/ocfs2/localalloc.c:416 ocfs2_dismount_volume+0x1de/0x880 fs/ocfs2/super.c:1885 generic_shutdown_super+0x130/0x300 fs/super.c:475 kill_block_super+0x7c/0xe0 fs/super.c:1427 deactivate_locked_super+0x93/0xf0 fs/super.c:335 cleanup_mnt+0x418/0x4d0 fs/namespace.c:1148 task_work_run+0x125/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #2 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 ocfs2_start_trans+0x368/0x6c0 fs/ocfs2/journal.c:374 ocfs2_shutdown_local_alloc+0x1fd/0xa10 fs/ocfs2/localalloc.c:416 ocfs2_dismount_volume+0x1de/0x880 fs/ocfs2/super.c:1885 generic_shutdown_super+0x130/0x300 fs/super.c:475 kill_block_super+0x7c/0xe0 fs/super.c:1427 deactivate_locked_super+0x93/0xf0 fs/super.c:335 cleanup_mnt+0x418/0x4d0 fs/namespace.c:1148 task_work_run+0x125/0x1a0 kernel/task_work.c:188 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline] syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #1 (sb_internal#3){.+.+}-{0:0}: __lock_release kernel/locking/lockdep.c:5339 [inline] lock_release+0x31a/0x870 kernel/locking/lockdep.c:5643 up_write+0x29/0x420 kernel/locking/rwsem.c:1603 inode_unlock include/linux/fs.h:792 [inline] ocfs2_free_ac_resource fs/ocfs2/suballoc.c:126 [inline] ocfs2_free_alloc_context+0x93/0x1a0 fs/ocfs2/suballoc.c:140 ocfs2_write_begin_nolock+0x40f2/0x4180 fs/ocfs2/aops.c:1826 ocfs2_write_begin+0x1ab/0x300 fs/ocfs2/aops.c:1905 generic_perform_write+0x2aa/0x530 mm/filemap.c:3785 __generic_file_write_iter+0x25f/0x4e0 mm/filemap.c:3912 ocfs2_file_write_iter+0x1578/0x1cf0 fs/ocfs2/file.c:2472 do_iter_readv_writev+0x497/0x600 fs/read_write.c:-1 do_iter_write+0x205/0x7b0 fs/read_write.c:855 vfs_writev fs/read_write.c:928 [inline] do_pwritev+0x204/0x340 fs/read_write.c:1025 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623 down_write+0x38/0x60 kernel/locking/rwsem.c:1551 ocfs2_lock_global_qf+0x1e5/0x270 fs/ocfs2/quota_global.c:314 ocfs2_acquire_dquot+0x29d/0xaf0 fs/ocfs2/quota_global.c:816 dqget+0x778/0xeb0 fs/quota/dquot.c:988 __dquot_initialize+0x3b6/0xcb0 fs/quota/dquot.c:1517 ocfs2_get_init_inode+0x138/0x1b0 fs/ocfs2/namei.c:202 ocfs2_mknod+0x8aa/0x22b0 fs/ocfs2/namei.c:310 ocfs2_mkdir+0x192/0x410 fs/ocfs2/namei.c:657 vfs_mkdir+0x387/0x570 fs/namei.c:4073 do_mkdirat+0x1d7/0x5a0 fs/namei.c:4098 __do_sys_mkdirat fs/namei.c:4113 [inline] __se_sys_mkdirat fs/namei.c:4111 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4111 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 other info that might help us debug this: Chain exists of: &ocfs2_quota_ip_alloc_sem_key --> &dquot->dq_lock --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7); lock(&dquot->dq_lock); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7); lock(&ocfs2_quota_ip_alloc_sem_key); *** DEADLOCK *** 5 locks held by syz.8.1370/10995: #0: ffff88801f5de460 (sb_writers#32){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:386 #1: ffff888062225108 (&type->i_mutex_dir_key#21/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline] #1: ffff888062225108 (&type->i_mutex_dir_key#21/1){+.+.}-{3:3}, at: filename_create+0x1f2/0x450 fs/namei.c:3843 #2: ffff88805ff0d108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #2: ffff88805ff0d108 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x161/0x4350 fs/ocfs2/suballoc.c:782 #3: ffff888047dbe0a8 (&dquot->dq_lock){+.+.}-{3:3}, at: ocfs2_acquire_dquot+0x290/0xaf0 fs/ocfs2/quota_global.c:811 #4: ffff888062226d88 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #4: ffff888062226d88 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}, at: ocfs2_lock_global_qf+0x1c7/0x270 fs/ocfs2/quota_global.c:313 stack backtrace: CPU: 1 PID: 10995 Comm: syz.8.1370 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106 check_noncircular+0x274/0x310 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c33/0x7c60 kernel/locking/lockdep.c:5012 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623 down_write+0x38/0x60 kernel/locking/rwsem.c:1551 ocfs2_lock_global_qf+0x1e5/0x270 fs/ocfs2/quota_global.c:314 ocfs2_acquire_dquot+0x29d/0xaf0 fs/ocfs2/quota_global.c:816 dqget+0x778/0xeb0 fs/quota/dquot.c:988 __dquot_initialize+0x3b6/0xcb0 fs/quota/dquot.c:1517 ocfs2_get_init_inode+0x138/0x1b0 fs/ocfs2/namei.c:202 ocfs2_mknod+0x8aa/0x22b0 fs/ocfs2/namei.c:310 ocfs2_mkdir+0x192/0x410 fs/ocfs2/namei.c:657 vfs_mkdir+0x387/0x570 fs/namei.c:4073 do_mkdirat+0x1d7/0x5a0 fs/namei.c:4098 __do_sys_mkdirat fs/namei.c:4113 [inline] __se_sys_mkdirat fs/namei.c:4111 [inline] __x64_sys_mkdirat+0x85/0x90 fs/namei.c:4111 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f74c0ef3e97 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:00007f74bf15be68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007f74bf15bef0 RCX: 00007f74c0ef3e97 RDX: 00000000000001ff RSI: 00002000000000c0 RDI: 00000000ffffff9c RBP: 00002000000002c0 R08: 00002000000007c0 R09: 0000000000000000 R10: 00002000000002c0 R11: 0000000000000246 R12: 00002000000000c0 R13: 00007f74bf15beb0 R14: 0000000000000000 R15: 0000000000000000 ocfs2: Unmounting device (7,8) on (node local)