ocfs2: Mounting device (7,2) on (node local, slot 0) with ordered data mode. ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.2.62/4549 is trying to acquire lock: ffff888062ab2650 (sb_internal#4){.+.+}-{0:0}, at: ocfs2_acquire_dquot+0x688/0xb10 fs/ocfs2/quota_global.c:848 but task is already holding lock: ffff88805f77a2e0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_lock_global_qf+0x1fe/0x290 fs/ocfs2/quota_global.c:314 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #6 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}: down_write+0x38/0x60 kernel/locking/rwsem.c:1551 ocfs2_lock_global_qf+0x1fe/0x290 fs/ocfs2/quota_global.c:314 ocfs2_acquire_dquot+0x29d/0xb10 fs/ocfs2/quota_global.c:816 dqget+0x778/0xeb0 fs/quota/dquot.c:988 __dquot_initialize+0x3c3/0xcd0 fs/quota/dquot.c:1517 ocfs2_get_init_inode+0x144/0x1b0 fs/ocfs2/namei.c:202 ocfs2_mknod+0x8ab/0x2510 fs/ocfs2/namei.c:310 ocfs2_mkdir+0x192/0x420 fs/ocfs2/namei.c:657 vfs_mkdir+0x387/0x570 fs/namei.c:4073 do_mkdirat+0x1df/0x5b0 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 (&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+0x1d7/0x290 fs/ocfs2/quota_global.c:313 ocfs2_acquire_dquot+0x29d/0xb10 fs/ocfs2/quota_global.c:816 dqget+0x778/0xeb0 fs/quota/dquot.c:988 __dquot_initialize+0x3c3/0xcd0 fs/quota/dquot.c:1517 ocfs2_get_init_inode+0x144/0x1b0 fs/ocfs2/namei.c:202 ocfs2_mknod+0x8ab/0x2510 fs/ocfs2/namei.c:310 ocfs2_mkdir+0x192/0x420 fs/ocfs2/namei.c:657 vfs_mkdir+0x387/0x570 fs/namei.c:4073 do_mkdirat+0x1df/0x5b0 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 -> #4 ( &dquot->dq_lock){+.+.}-{3:3}: __mutex_lock_common+0x1e3/0x2400 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+0xf81/0x4980 fs/ext4/mballoc.c:5734 ext4_alloc_branch fs/ext4/indirect.c:340 [inline] ext4_ind_map_blocks+0xeb2/0x21b0 fs/ext4/indirect.c:635 ext4_map_blocks+0x92c/0x1b30 fs/ext4/inode.c:675 _ext4_get_block+0x1e7/0x540 fs/ext4/inode.c:816 ext4_block_write_begin+0x61b/0x1220 fs/ext4/inode.c:1101 ext4_write_begin+0x6c8/0x15d0 fs/ext4/ext4_jbd2.h:-1 ext4_da_write_begin+0x43b/0xb40 fs/ext4/inode.c:2975 generic_perform_write+0x2b6/0x550 mm/filemap.c:3785 ext4_buffered_write_iter+0x25f/0x3b0 fs/ext4/file.c:268 ext4_file_write_iter+0x74d/0x1700 fs/ext4/file.c:-1 do_iter_readv_writev+0x47e/0x5f0 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+0x240/0x3a0 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 -> #3 (&ei->i_data_sem){++++}-{3:3}: down_write+0x38/0x60 kernel/locking/rwsem.c:1551 ext4_truncate+0x97f/0x10f0 fs/ext4/inode.c:4251 ext4_setattr+0xffe/0x19e0 fs/ext4/inode.c:5597 notify_change+0xbcd/0xee0 fs/attr.c:505 do_truncate+0x1ac/0x240 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 -> #2 (jbd2_handle){++++}-{0:0}: start_this_handle+0x136f/0x15c0 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+0x3b2/0x6f0 fs/ocfs2/journal.c:376 ocfs2_mknod+0xf5a/0x2510 fs/ocfs2/namei.c:361 ocfs2_mkdir+0x192/0x420 fs/ocfs2/namei.c:657 vfs_mkdir+0x387/0x570 fs/namei.c:4073 do_mkdirat+0x1df/0x5b0 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 -> #1 (&journal->j_trans_barrier){.+.+}-{3:3}: down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 ocfs2_start_trans+0x3a6/0x6f0 fs/ocfs2/journal.c:374 ocfs2_mknod+0xf5a/0x2510 fs/ocfs2/namei.c:361 ocfs2_mkdir+0x192/0x420 fs/ocfs2/namei.c:657 vfs_mkdir+0x387/0x570 fs/namei.c:4073 do_mkdirat+0x1df/0x5b0 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 -> #0 (sb_internal#4){.+.+}-{0:0}: 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+0x2c42/0x7d10 kernel/locking/lockdep.c:5012 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1811 [inline] sb_start_intwrite include/linux/fs.h:1928 [inline] ocfs2_start_trans+0x2a7/0x6f0 fs/ocfs2/journal.c:372 ocfs2_acquire_dquot+0x688/0xb10 fs/ocfs2/quota_global.c:848 dqget+0x778/0xeb0 fs/quota/dquot.c:988 __dquot_initialize+0x3c3/0xcd0 fs/quota/dquot.c:1517 ocfs2_get_init_inode+0x144/0x1b0 fs/ocfs2/namei.c:202 ocfs2_mknod+0x8ab/0x2510 fs/ocfs2/namei.c:310 ocfs2_mkdir+0x192/0x420 fs/ocfs2/namei.c:657 vfs_mkdir+0x387/0x570 fs/namei.c:4073 do_mkdirat+0x1df/0x5b0 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: sb_internal#4 --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7 --> &ocfs2_quota_ip_alloc_sem_key Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ocfs2_quota_ip_alloc_sem_key); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7); lock(&ocfs2_quota_ip_alloc_sem_key); lock(sb_internal#4); *** DEADLOCK *** 6 locks held by syz.2.62/4549: #0: ffff888062ab2460 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:386 #1: ffff8880716a42c8 (&type->i_mutex_dir_key#12/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline] #1: ffff8880716a42c8 (&type->i_mutex_dir_key#12/1){+.+.}-{3:3}, at: filename_create+0x208/0x470 fs/namei.c:3843 #2: ffff88805f77df48 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #2: ffff88805f77df48 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x16a/0x44d0 fs/ocfs2/suballoc.c:782 #3: ffff8880717240a8 (&dquot->dq_lock){+.+.}-{3:3}, at: ocfs2_acquire_dquot+0x28b/0xb10 fs/ocfs2/quota_global.c:811 #4: ffff88805f77a648 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #4: ffff88805f77a648 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{3:3}, at: ocfs2_lock_global_qf+0x1d7/0x290 fs/ocfs2/quota_global.c:313 #5: ffff88805f77a2e0 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}, at: ocfs2_lock_global_qf+0x1fe/0x290 fs/ocfs2/quota_global.c:314 stack backtrace: CPU: 0 PID: 4549 Comm: syz.2.62 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 check_noncircular+0x296/0x330 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+0x2c42/0x7d10 kernel/locking/lockdep.c:5012 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1811 [inline] sb_start_intwrite include/linux/fs.h:1928 [inline] ocfs2_start_trans+0x2a7/0x6f0 fs/ocfs2/journal.c:372 ocfs2_acquire_dquot+0x688/0xb10 fs/ocfs2/quota_global.c:848 dqget+0x778/0xeb0 fs/quota/dquot.c:988 __dquot_initialize+0x3c3/0xcd0 fs/quota/dquot.c:1517 ocfs2_get_init_inode+0x144/0x1b0 fs/ocfs2/namei.c:202 ocfs2_mknod+0x8ab/0x2510 fs/ocfs2/namei.c:310 ocfs2_mkdir+0x192/0x420 fs/ocfs2/namei.c:657 vfs_mkdir+0x387/0x570 fs/namei.c:4073 do_mkdirat+0x1df/0x5b0 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: 0033:0x7ff961e50b97 Code: 00 66 90 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 db f7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 b8 02 01 00 00 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:00007ff9600ace58 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007ff9600acee0 RCX: 00007ff961e50b97 RDX: 00000000000001ff RSI: 0000200000000040 RDI: 00000000ffffff9c RBP: 0000200000000000 R08: 0000200000000040 R09: 0000000000000000 R10: 0000200000000000 R11: 0000000000000246 R12: 0000200000000040 R13: 00007ff9600acea0 R14: 0000000000000000 R15: 0000000000000000