syzbot

ocfs2: Mounting device (7,3) on (node local, slot 0) with ordered data mode.
======================================================
WARNING: possible circular locking dependency detected
6.14.0-rc7-syzkaller-ga2392f333575 #0 Not tainted
------------------------------------------------------
syz-executor267/6591 is trying to acquire lock:
ffff0000c79dc610 (sb_internal#2){.+.+}-{0:0}, at: ocfs2_acquire_dquot+0x5c0/0xa90 fs/ocfs2/quota_global.c:860

but task is already holding lock:
ffff0000dd390660 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_lock_global_qf+0x1d4/0x260 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){++++}-{4:4}:
       down_write+0x50/0xc0 kernel/locking/rwsem.c:1577
       ocfs2_lock_global_qf+0x1d4/0x260 fs/ocfs2/quota_global.c:314
       ocfs2_acquire_dquot+0x268/0xa90 fs/ocfs2/quota_global.c:828
       dqget+0x660/0xcec fs/quota/dquot.c:977
       dquot_set_dqblk+0x40/0xeac fs/quota/dquot.c:2820
       quota_setquota+0x630/0x73c fs/quota/quota.c:310
       do_quotactl+0x508/0x698 fs/quota/quota.c:802
       __do_sys_quotactl fs/quota/quota.c:961 [inline]
       __se_sys_quotactl fs/quota/quota.c:917 [inline]
       __arm64_sys_quotactl+0x2c0/0xc9c 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+0x54/0x168 arch/arm64/kernel/entry-common.c:744
       el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

-> #5 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}:
       down_write+0x50/0xc0 kernel/locking/rwsem.c:1577
       inode_lock include/linux/fs.h:877 [inline]
       ocfs2_lock_global_qf+0x1b8/0x260 fs/ocfs2/quota_global.c:313
       ocfs2_acquire_dquot+0x268/0xa90 fs/ocfs2/quota_global.c:828
       dqget+0x660/0xcec fs/quota/dquot.c:977
       dquot_set_dqblk+0x40/0xeac fs/quota/dquot.c:2820
       quota_setquota+0x630/0x73c fs/quota/quota.c:310
       do_quotactl+0x508/0x698 fs/quota/quota.c:802
       __do_sys_quotactl fs/quota/quota.c:961 [inline]
       __se_sys_quotactl fs/quota/quota.c:917 [inline]
       __arm64_sys_quotactl+0x2c0/0xc9c 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+0x54/0x168 arch/arm64/kernel/entry-common.c:744
       el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

-> #4 (&dquot->dq_lock){+.+.}-{4:4}:
       __mutex_lock_common+0x1f0/0x24b8 kernel/locking/mutex.c:585
       __mutex_lock kernel/locking/mutex.c:730 [inline]
       mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:782
       wait_on_dquot fs/quota/dquot.c:354 [inline]
       dqget+0x5f0/0xcec fs/quota/dquot.c:972
       dquot_transfer+0x3a8/0x5c0 fs/quota/dquot.c:2154
       ext4_setattr+0x8b8/0x173c fs/ext4/inode.c:5401
       notify_change+0x9f0/0xca0 fs/attr.c:552
       chown_common+0x440/0x708 fs/open.c:782
       vfs_fchown fs/open.c:850 [inline]
       ksys_fchown+0xe0/0x158 fs/open.c:862
       __do_sys_fchown fs/open.c:867 [inline]
       __se_sys_fchown fs/open.c:865 [inline]
       __arm64_sys_fchown+0x7c/0x94 fs/open.c:865
       __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+0x54/0x168 arch/arm64/kernel/entry-common.c:744
       el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

-> #3 (&ei->xattr_sem){++++}-{4:4}:
       down_write+0x50/0xc0 kernel/locking/rwsem.c:1577
       ext4_write_lock_xattr fs/ext4/xattr.h:154 [inline]
       ext4_xattr_set_handle+0x1dc/0x12d0 fs/ext4/xattr.c:2373
       ext4_initxattrs+0xa4/0x11c fs/ext4/xattr_security.c:44
       security_inode_init_security+0x73c/0x908 security/security.c:1852
       ext4_init_security+0x44/0x58 fs/ext4/xattr_security.c:58
       __ext4_new_inode+0x2d44/0x39e4 fs/ext4/ialloc.c:1324
       ext4_create+0x234/0x480 fs/ext4/namei.c:2841
       lookup_open fs/namei.c:3651 [inline]
       open_last_lookups fs/namei.c:3750 [inline]
       path_openat+0x13ec/0x2b1c fs/namei.c:3986
       do_filp_open+0x1e8/0x404 fs/namei.c:4016
       do_sys_openat2+0x124/0x1b8 fs/open.c:1428
       do_sys_open fs/open.c:1443 [inline]
       __do_sys_openat fs/open.c:1459 [inline]
       __se_sys_openat fs/open.c:1454 [inline]
       __arm64_sys_openat+0x1f0/0x240 fs/open.c:1454
       __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+0x54/0x168 arch/arm64/kernel/entry-common.c:744
       el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

-> #2 (jbd2_handle){.+.+}-{0:0}:
       start_this_handle+0xf34/0x11c4 fs/jbd2/transaction.c:448
       jbd2__journal_start+0x298/0x544 fs/jbd2/transaction.c:505
       jbd2_journal_start+0x3c/0x4c fs/jbd2/transaction.c:544
       ocfs2_start_trans+0x3d0/0x71c fs/ocfs2/journal.c:352
       ocfs2_modify_bh+0xe4/0x484 fs/ocfs2/quota_local.c:101
       ocfs2_local_read_info+0x1220/0x15bc fs/ocfs2/quota_local.c:771
       dquot_load_quota_sb+0x6e4/0xb24 fs/quota/dquot.c:2459
       dquot_load_quota_inode+0x280/0x4f4 fs/quota/dquot.c:2496
       ocfs2_enable_quotas+0x17c/0x3cc fs/ocfs2/super.c:930
       ocfs2_fill_super+0x4f34/0x60fc fs/ocfs2/super.c:1140
       get_tree_bdev_flags+0x38c/0x494 fs/super.c:1636
       get_tree_bdev+0x2c/0x3c fs/super.c:1659
       ocfs2_get_tree+0x28/0x38 fs/ocfs2/super.c:1184
       vfs_get_tree+0x90/0x28c fs/super.c:1814
       do_new_mount+0x278/0x900 fs/namespace.c:3560
       path_mount+0x590/0xe04 fs/namespace.c:3887
       do_mount fs/namespace.c:3900 [inline]
       __do_sys_mount fs/namespace.c:4111 [inline]
       __se_sys_mount fs/namespace.c:4088 [inline]
       __arm64_sys_mount+0x4f4/0x5d0 fs/namespace.c:4088
       __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+0x54/0x168 arch/arm64/kernel/entry-common.c:744
       el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

-> #1 (&journal->j_trans_barrier){.+.+}-{4:4}:
       down_read+0x58/0x2fc kernel/locking/rwsem.c:1524
       ocfs2_start_trans+0x3c4/0x71c fs/ocfs2/journal.c:350
       ocfs2_modify_bh+0xe4/0x484 fs/ocfs2/quota_local.c:101
       ocfs2_local_read_info+0x1220/0x15bc fs/ocfs2/quota_local.c:771
       dquot_load_quota_sb+0x6e4/0xb24 fs/quota/dquot.c:2459
       dquot_load_quota_inode+0x280/0x4f4 fs/quota/dquot.c:2496
       ocfs2_enable_quotas+0x17c/0x3cc fs/ocfs2/super.c:930
       ocfs2_fill_super+0x4f34/0x60fc fs/ocfs2/super.c:1140
       get_tree_bdev_flags+0x38c/0x494 fs/super.c:1636
       get_tree_bdev+0x2c/0x3c fs/super.c:1659
       ocfs2_get_tree+0x28/0x38 fs/ocfs2/super.c:1184
       vfs_get_tree+0x90/0x28c fs/super.c:1814
       do_new_mount+0x278/0x900 fs/namespace.c:3560
       path_mount+0x590/0xe04 fs/namespace.c:3887
       do_mount fs/namespace.c:3900 [inline]
       __do_sys_mount fs/namespace.c:4111 [inline]
       __se_sys_mount fs/namespace.c:4088 [inline]
       __arm64_sys_mount+0x4f4/0x5d0 fs/namespace.c:4088
       __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+0x54/0x168 arch/arm64/kernel/entry-common.c:744
       el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

-> #0 (sb_internal#2){.+.+}-{0:0}:
       check_prev_add kernel/locking/lockdep.c:3163 [inline]
       check_prevs_add kernel/locking/lockdep.c:3282 [inline]
       validate_chain kernel/locking/lockdep.c:3906 [inline]
       __lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5228
       lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5851
       percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
       __sb_start_write include/linux/fs.h:1785 [inline]
       sb_start_intwrite include/linux/fs.h:1968 [inline]
       ocfs2_start_trans+0x244/0x71c fs/ocfs2/journal.c:348
       ocfs2_acquire_dquot+0x5c0/0xa90 fs/ocfs2/quota_global.c:860
       dqget+0x660/0xcec fs/quota/dquot.c:977
       dquot_set_dqblk+0x40/0xeac fs/quota/dquot.c:2820
       quota_setquota+0x630/0x73c fs/quota/quota.c:310
       do_quotactl+0x508/0x698 fs/quota/quota.c:802
       __do_sys_quotactl fs/quota/quota.c:961 [inline]
       __se_sys_quotactl fs/quota/quota.c:917 [inline]
       __arm64_sys_quotactl+0x2c0/0xc9c 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+0x54/0x168 arch/arm64/kernel/entry-common.c:744
       el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
       el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

other info that might help us debug this:

Chain exists of:
  sb_internal#2 --> &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2 --> &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]#2);
                               lock(&ocfs2_quota_ip_alloc_sem_key);
  rlock(sb_internal#2);

 *** DEADLOCK ***

4 locks held by syz-executor267/6591:
 #0: ffff0000c79dc0e0 (&type->s_umount_key#49){.+.+}-{4:4}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff0000c79dc0e0 (&type->s_umount_key#49){.+.+}-{4:4}, at: super_lock+0x244/0x33c fs/super.c:120
 #1: ffff0000db6020a8 (&dquot->dq_lock){+.+.}-{4:4}, at: ocfs2_acquire_dquot+0x25c/0xa90 fs/ocfs2/quota_global.c:823
 #2: ffff0000dd3909c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline]
 #2: ffff0000dd3909c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{4:4}, at: ocfs2_lock_global_qf+0x1b8/0x260 fs/ocfs2/quota_global.c:313
 #3: ffff0000dd390660 (&ocfs2_quota_ip_alloc_sem_key){++++}-{4:4}, at: ocfs2_lock_global_qf+0x1d4/0x260 fs/ocfs2/quota_global.c:314

stack backtrace:
CPU: 0 UID: 0 PID: 6591 Comm: syz-executor267 Not tainted 6.14.0-rc7-syzkaller-ga2392f333575 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C)
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 print_circular_bug+0x154/0x1c0 kernel/locking/lockdep.c:2076
 check_noncircular+0x310/0x404 kernel/locking/lockdep.c:2208
 check_prev_add kernel/locking/lockdep.c:3163 [inline]
 check_prevs_add kernel/locking/lockdep.c:3282 [inline]
 validate_chain kernel/locking/lockdep.c:3906 [inline]
 __lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5228
 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5851
 percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
 __sb_start_write include/linux/fs.h:1785 [inline]
 sb_start_intwrite include/linux/fs.h:1968 [inline]
 ocfs2_start_trans+0x244/0x71c fs/ocfs2/journal.c:348
 ocfs2_acquire_dquot+0x5c0/0xa90 fs/ocfs2/quota_global.c:860
 dqget+0x660/0xcec fs/quota/dquot.c:977
 dquot_set_dqblk+0x40/0xeac fs/quota/dquot.c:2820
 quota_setquota+0x630/0x73c fs/quota/quota.c:310
 do_quotactl+0x508/0x698 fs/quota/quota.c:802
 __do_sys_quotactl fs/quota/quota.c:961 [inline]
 __se_sys_quotactl fs/quota/quota.c:917 [inline]
 __arm64_sys_quotactl+0x2c0/0xc9c 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+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600