====================================================== WARNING: possible circular locking dependency detected 6.16.0-rc7-syzkaller-g82af5ea7c611 #0 Not tainted ------------------------------------------------------ syz.1.273/8196 is trying to acquire lock: ffff0000dded6d80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] ffff0000dded6d80 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x18c/0x22c fs/ocfs2/quota_global.c:313 but task is already holding lock: ffff0000f9a0c0a8 (&dquot->dq_lock){+.+.}-{4:4}, at: ocfs2_acquire_dquot+0x24c/0xa10 fs/ocfs2/quota_global.c:823 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #6 (&dquot->dq_lock){+.+.}-{4:4}: __mutex_lock_common+0x1d0/0x2190 kernel/locking/mutex.c:602 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799 wait_on_dquot fs/quota/dquot.c:354 [inline] dqget+0x5e4/0xccc fs/quota/dquot.c:972 dquot_transfer+0x37c/0x560 fs/quota/dquot.c:2154 ext4_setattr+0x738/0x1810 fs/ext4/inode.c:5817 notify_change+0x9a4/0xc50 fs/attr.c:552 chown_common+0x374/0x4dc fs/open.c:790 vfs_fchown fs/open.c:858 [inline] ksys_fchown+0xe0/0x158 fs/open.c:870 __do_sys_fchown fs/open.c:875 [inline] __se_sys_fchown fs/open.c:873 [inline] __arm64_sys_fchown+0x7c/0x94 fs/open.c:873 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #5 (&ei->xattr_sem){++++}-{4:4}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 ext4_write_lock_xattr fs/ext4/xattr.h:157 [inline] ext4_xattr_set_handle+0x11c/0x1260 fs/ext4/xattr.c:2362 ext4_initxattrs+0xa4/0x11c fs/ext4/xattr_security.c:44 security_inode_init_security+0x6dc/0x7f4 security/security.c:1852 ext4_init_security+0x44/0x58 fs/ext4/xattr_security.c:58 __ext4_new_inode+0x2854/0x3278 fs/ext4/ialloc.c:1325 ext4_create+0x1f8/0x3fc fs/ext4/namei.c:2822 lookup_open fs/namei.c:3717 [inline] open_last_lookups fs/namei.c:3816 [inline] path_openat+0x12d8/0x2c40 fs/namei.c:4052 do_filp_open+0x18c/0x36c fs/namei.c:4082 do_sys_openat2+0x11c/0x1b4 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __arm64_sys_openat+0x120/0x158 fs/open.c:1463 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #4 (jbd2_handle){++++}-{0:0}: start_this_handle+0xe74/0x10dc fs/jbd2/transaction.c:444 jbd2__journal_start+0x288/0x51c fs/jbd2/transaction.c:501 jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:540 ocfs2_start_trans+0x368/0x6b0 fs/ocfs2/journal.c:374 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:685 [inline] ocfs2_reserve_suballoc_bits+0x630/0x3b9c fs/ocfs2/suballoc.c:834 ocfs2_reserve_new_metadata_blocks+0x368/0x810 fs/ocfs2/suballoc.c:984 ocfs2_mknod+0xbd8/0x1cf0 fs/ocfs2/namei.c:347 ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:673 lookup_open fs/namei.c:3717 [inline] open_last_lookups fs/namei.c:3816 [inline] path_openat+0x12d8/0x2c40 fs/namei.c:4052 do_filp_open+0x18c/0x36c fs/namei.c:4082 do_sys_openat2+0x11c/0x1b4 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __arm64_sys_openat+0x120/0x158 fs/open.c:1463 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #3 (&journal->j_trans_barrier){.+.+}-{4:4}: down_read+0x58/0x2f8 kernel/locking/rwsem.c:1524 ocfs2_start_trans+0x35c/0x6b0 fs/ocfs2/journal.c:372 ocfs2_block_group_alloc fs/ocfs2/suballoc.c:685 [inline] ocfs2_reserve_suballoc_bits+0x630/0x3b9c fs/ocfs2/suballoc.c:834 ocfs2_reserve_new_metadata_blocks+0x368/0x810 fs/ocfs2/suballoc.c:984 ocfs2_mknod+0xbd8/0x1cf0 fs/ocfs2/namei.c:347 ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:673 lookup_open fs/namei.c:3717 [inline] open_last_lookups fs/namei.c:3816 [inline] path_openat+0x12d8/0x2c40 fs/namei.c:4052 do_filp_open+0x18c/0x36c fs/namei.c:4082 do_sys_openat2+0x11c/0x1b4 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __arm64_sys_openat+0x120/0x158 fs/open.c:1463 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #2 (sb_internal#3){.+.+}-{0:0}: percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline] percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] __sb_start_write include/linux/fs.h:1795 [inline] sb_start_intwrite include/linux/fs.h:1978 [inline] ocfs2_start_trans+0x1f4/0x6b0 fs/ocfs2/journal.c:370 ocfs2_write_info+0x114/0x324 fs/ocfs2/quota_global.c:997 dquot_set_dqinfo+0x370/0x5d4 fs/quota/dquot.c:2897 quota_setinfo+0x2c4/0x2cc fs/quota/quota.c:174 do_quotactl+0x59c/0x738 fs/quota/quota.c:796 __do_sys_quotactl fs/quota/quota.c:961 [inline] __se_sys_quotactl fs/quota/quota.c:917 [inline] __arm64_sys_quotactl+0x298/0xb34 fs/quota/quota.c:917 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #1 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 ocfs2_lock_global_qf+0x1a8/0x22c fs/ocfs2/quota_global.c:314 ocfs2_write_info+0xdc/0x324 fs/ocfs2/quota_global.c:994 dquot_set_dqinfo+0x370/0x5d4 fs/quota/dquot.c:2897 quota_setinfo+0x2c4/0x2cc fs/quota/quota.c:174 do_quotactl+0x59c/0x738 fs/quota/quota.c:796 __do_sys_quotactl fs/quota/quota.c:961 [inline] __se_sys_quotactl fs/quota/quota.c:917 [inline] __arm64_sys_quotactl+0x298/0xb34 fs/quota/quota.c:917 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5240 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5871 down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:869 [inline] ocfs2_lock_global_qf+0x18c/0x22c fs/ocfs2/quota_global.c:313 ocfs2_acquire_dquot+0x258/0xa10 fs/ocfs2/quota_global.c:828 dqget+0x654/0xccc fs/quota/dquot.c:977 __dquot_initialize+0x2d4/0xa80 fs/quota/dquot.c:1505 dquot_initialize+0x24/0x34 fs/quota/dquot.c:1567 ocfs2_get_init_inode+0x134/0x1a8 fs/ocfs2/namei.c:202 ocfs2_mknod+0x734/0x1cf0 fs/ocfs2/namei.c:310 ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:673 lookup_open fs/namei.c:3717 [inline] open_last_lookups fs/namei.c:3816 [inline] path_openat+0x12d8/0x2c40 fs/namei.c:4052 do_filp_open+0x18c/0x36c fs/namei.c:4082 do_sys_openat2+0x11c/0x1b4 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __arm64_sys_openat+0x120/0x158 fs/open.c:1463 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 other info that might help us debug this: Chain exists of: &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7 --> &ei->xattr_sem --> &dquot->dq_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&dquot->dq_lock); lock(&ei->xattr_sem); lock(&dquot->dq_lock); lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#7); *** DEADLOCK *** 4 locks held by syz.1.273/8196: #0: ffff0000f6f92428 (sb_writers#14){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:557 #1: ffff0000dded1800 (&type->i_mutex_dir_key#9){++++}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #1: ffff0000dded1800 (&type->i_mutex_dir_key#9){++++}-{4:4}, at: open_last_lookups fs/namei.c:3813 [inline] #1: ffff0000dded1800 (&type->i_mutex_dir_key#9){++++}-{4:4}, at: path_openat+0x638/0x2c40 fs/namei.c:4052 #2: ffff0000ddedb480 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline] #2: ffff0000ddedb480 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x12c/0x3b9c fs/ocfs2/suballoc.c:788 #3: ffff0000f9a0c0a8 (&dquot->dq_lock){+.+.}-{4:4}, at: ocfs2_acquire_dquot+0x24c/0xa10 fs/ocfs2/quota_global.c:823 stack backtrace: CPU: 1 UID: 0 PID: 8196 Comm: syz.1.273 Not tainted 6.16.0-rc7-syzkaller-g82af5ea7c611 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/18/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_circular_bug+0x324/0x32c kernel/locking/lockdep.c:2046 check_noncircular+0x154/0x174 kernel/locking/lockdep.c:2178 check_prev_add kernel/locking/lockdep.c:3168 [inline] check_prevs_add kernel/locking/lockdep.c:3287 [inline] validate_chain kernel/locking/lockdep.c:3911 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5240 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5871 down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:869 [inline] ocfs2_lock_global_qf+0x18c/0x22c fs/ocfs2/quota_global.c:313 ocfs2_acquire_dquot+0x258/0xa10 fs/ocfs2/quota_global.c:828 dqget+0x654/0xccc fs/quota/dquot.c:977 __dquot_initialize+0x2d4/0xa80 fs/quota/dquot.c:1505 dquot_initialize+0x24/0x34 fs/quota/dquot.c:1567 ocfs2_get_init_inode+0x134/0x1a8 fs/ocfs2/namei.c:202 ocfs2_mknod+0x734/0x1cf0 fs/ocfs2/namei.c:310 ocfs2_create+0x190/0x474 fs/ocfs2/namei.c:673 lookup_open fs/namei.c:3717 [inline] open_last_lookups fs/namei.c:3816 [inline] path_openat+0x12d8/0x2c40 fs/namei.c:4052 do_filp_open+0x18c/0x36c fs/namei.c:4082 do_sys_openat2+0x11c/0x1b4 fs/open.c:1437 do_sys_open fs/open.c:1452 [inline] __do_sys_openat fs/open.c:1468 [inline] __se_sys_openat fs/open.c:1463 [inline] __arm64_sys_openat+0x120/0x158 fs/open.c:1463 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 (syz.1.273,8196,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x2c7b5077, computed 0x28030c75. Applying ECC. (syz.1.273,8196,1):ocfs2_block_check_validate:416 ERROR: Fixed CRC32 failed: stored: 0x2c7b5077, computed 0x28d1d8ae (syz.1.273,8196,1):ocfs2_read_quota_phys_block:160 ERROR: status = -5 (syz.1.273,8196,1):ocfs2_quota_read:201 ERROR: status = -5 Quota error (device loop1): find_tree_dqentry: Can't read quota tree block 5 Quota error (device loop1): qtree_read_dquot: Can't read quota structure for id 0 (syz.1.273,8196,1):ocfs2_acquire_dquot:890 ERROR: status = -5 (syz.1.273,8196,1):ocfs2_mknod:314 ERROR: status = -5 (syz.1.273,8196,1):ocfs2_mknod:502 ERROR: status = -5 (syz.1.273,8196,1):ocfs2_create:675 ERROR: status = -5 (syz.1.273,8196,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x2c7b5077, computed 0x28030c75. Applying ECC. (syz.1.273,8196,1):ocfs2_block_check_validate:416 ERROR: Fixed CRC32 failed: stored: 0x2c7b5077, computed 0x28d1d8ae (syz.1.273,8196,1):ocfs2_read_quota_phys_block:160 ERROR: status = -5 (syz.1.273,8196,1):ocfs2_quota_read:201 ERROR: status = -5 Quota error (device loop1): find_tree_dqentry: Can't read quota tree block 5 Quota error (device loop1): qtree_read_dquot: Can't read quota structure for id 0 (syz.1.273,8196,1):ocfs2_acquire_dquot:890 ERROR: status = -5 (syz.1.273,8196,1):ocfs2_mknod:314 ERROR: status = -5 (syz.1.273,8196,1):ocfs2_mknod:502 ERROR: status = -5 (syz.1.273,8196,1):ocfs2_create:675 ERROR: status = -5 (syz.1.273,8196,1):ocfs2_block_check_validate:402 ERROR: CRC32 failed: stored: 0x2c7b5077, computed 0x28030c75. Applying ECC. (syz.1.273,8196,1):ocfs2_block_check_validate:416 ERROR: Fixed CRC32 failed: stored: 0x2c7b5077, computed 0x28d1d8ae (syz.1.273,8196,1):ocfs2_read_quota_phys_block:160 ERROR: status = -5 (syz.1.273,8196,1):ocfs2_quota_read:201 ERROR: status = -5 Quota error (device loop1): find_tree_dqentry: Can't read quota tree block 5 Quota error (device loop1): qtree_read_dquot: Can't read quota structure for id 0 (syz.1.273,8196,1):ocfs2_acquire_dquot:890 ERROR: status = -5 (syz.1.273,8196,1):ocfs2_mknod:314 ERROR: status = -5 (syz.1.273,8196,1):ocfs2_mknod:502 ERROR: status = -5 (syz.1.273,8196,1):ocfs2_create:675 ERROR: status = -5