======================================================
WARNING: possible circular locking dependency detected
6.1.137-syzkaller #0 Not tainted
------------------------------------------------------
syz.5.699/7194 is trying to acquire lock:
ffff88807271a428 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x5a/0x410 fs/quota/dquot.c:507

but task is already holding lock:
ffff888056b670e0 (&ei->i_data_sem){++++}-{3:3}, at: ext4_truncate+0x987/0x1230 fs/ext4/inode.c:4284

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #5 (&ei->i_data_sem){++++}-{3:3}:
       down_write+0x36/0x60 kernel/locking/rwsem.c:1573
       ext4_truncate+0x987/0x1230 fs/ext4/inode.c:4284
       ext4_setattr+0x10cb/0x19f0 fs/ext4/inode.c:5630
       notify_change+0xc74/0xf40 fs/attr.c:499
       do_truncate+0x197/0x220 fs/open.c:65
       do_sys_ftruncate+0x312/0x3c0 fs/open.c:193
       do_syscall_x64 arch/x86/entry/common.c:51 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #4 (jbd2_handle){++++}-{0:0}:
       start_this_handle+0x1f49/0x2150 fs/jbd2/transaction.c:463
       jbd2__journal_start+0x2b7/0x5a0 fs/jbd2/transaction.c:520
       jbd2_journal_start+0x26/0x30 fs/jbd2/transaction.c:559
       ocfs2_start_trans+0x372/0x6c0 fs/ocfs2/journal.c:354
       ocfs2_modify_bh+0xe5/0x460 fs/ocfs2/quota_local.c:101
       ocfs2_local_read_info+0x13b1/0x16e0 fs/ocfs2/quota_local.c:768
       dquot_load_quota_sb+0x756/0xac0 fs/quota/dquot.c:2470
       dquot_load_quota_inode+0x2d8/0x5d0 fs/quota/dquot.c:2507
       ocfs2_enable_quotas+0x1c3/0x440 fs/ocfs2/super.c:926
       ocfs2_fill_super+0x409f/0x4d00 fs/ocfs2/super.c:1139
       mount_bdev+0x287/0x3c0 fs/super.c:1443
       legacy_get_tree+0xe6/0x180 fs/fs_context.c:632
       vfs_get_tree+0x88/0x270 fs/super.c:1573
       do_new_mount+0x24a/0xa40 fs/namespace.c:3057
       do_mount fs/namespace.c:3400 [inline]
       __do_sys_mount fs/namespace.c:3608 [inline]
       __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3585
       do_syscall_x64 arch/x86/entry/common.c:51 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #3 (&journal->j_trans_barrier){.+.+}-{3:3}:
       down_read+0x42/0x2d0 kernel/locking/rwsem.c:1520
       ocfs2_start_trans+0x366/0x6c0 fs/ocfs2/journal.c:352
       ocfs2_modify_bh+0xe5/0x460 fs/ocfs2/quota_local.c:101
       ocfs2_local_read_info+0x13b1/0x16e0 fs/ocfs2/quota_local.c:768
       dquot_load_quota_sb+0x756/0xac0 fs/quota/dquot.c:2470
       dquot_load_quota_inode+0x2d8/0x5d0 fs/quota/dquot.c:2507
       ocfs2_enable_quotas+0x1c3/0x440 fs/ocfs2/super.c:926
       ocfs2_fill_super+0x409f/0x4d00 fs/ocfs2/super.c:1139
       mount_bdev+0x287/0x3c0 fs/super.c:1443
       legacy_get_tree+0xe6/0x180 fs/fs_context.c:632
       vfs_get_tree+0x88/0x270 fs/super.c:1573
       do_new_mount+0x24a/0xa40 fs/namespace.c:3057
       do_mount fs/namespace.c:3400 [inline]
       __do_sys_mount fs/namespace.c:3608 [inline]
       __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3585
       do_syscall_x64 arch/x86/entry/common.c:51 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #2 (sb_internal#3){.+.+}-{0:0}:
       percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
       __sb_start_write include/linux/fs.h:1891 [inline]
       sb_start_intwrite include/linux/fs.h:2013 [inline]
       ocfs2_start_trans+0x267/0x6c0 fs/ocfs2/journal.c:350
       ocfs2_acquire_dquot+0x66e/0xb10 fs/ocfs2/quota_global.c:848
       dqget+0x778/0xeb0 fs/quota/dquot.c:988
       dquot_set_dqblk+0x27/0xf90 fs/quota/dquot.c:2833
       quota_setquota+0x4ac/0x530 fs/quota/quota.c:310
       __do_sys_quotactl fs/quota/quota.c:960 [inline]
       __se_sys_quotactl+0x295/0x6b0 fs/quota/quota.c:916
       do_syscall_x64 arch/x86/entry/common.c:51 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #1 (&ocfs2_quota_ip_alloc_sem_key){++++}-{3:3}:
       down_write+0x36/0x60 kernel/locking/rwsem.c:1573
       ocfs2_create_local_dquot+0x1a0/0x1790 fs/ocfs2/quota_local.c:1229
       ocfs2_acquire_dquot+0x7ae/0xb10 fs/ocfs2/quota_global.c:871
       dqget+0x778/0xeb0 fs/quota/dquot.c:988
       dquot_set_dqblk+0x27/0xf90 fs/quota/dquot.c:2833
       quota_setquota+0x4ac/0x530 fs/quota/quota.c:310
       __do_sys_quotactl fs/quota/quota.c:960 [inline]
       __se_sys_quotactl+0x295/0x6b0 fs/quota/quota.c:916
       do_syscall_x64 arch/x86/entry/common.c:51 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #0 (&dquot->dq_lock){+.+.}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3090 [inline]
       check_prevs_add kernel/locking/lockdep.c:3209 [inline]
       validate_chain kernel/locking/lockdep.c:3825 [inline]
       __lock_acquire+0x2cf8/0x7c50 kernel/locking/lockdep.c:5049
       lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662
       __mutex_lock_common kernel/locking/mutex.c:603 [inline]
       __mutex_lock+0x120/0xaf0 kernel/locking/mutex.c:747
       dquot_commit+0x5a/0x410 fs/quota/dquot.c:507
       ext4_write_dquot+0x1f0/0x360 fs/ext4/super.c:6778
       mark_dquot_dirty fs/quota/dquot.c:372 [inline]
       mark_all_dquot_dirty+0xf9/0x400 fs/quota/dquot.c:412
       __dquot_free_space+0x7ec/0xbc0 fs/quota/dquot.c:1942
       dquot_free_space_nodirty include/linux/quotaops.h:379 [inline]
       dquot_free_space include/linux/quotaops.h:384 [inline]
       dquot_free_block include/linux/quotaops.h:395 [inline]
       ext4_mb_clear_bb fs/ext4/mballoc.c:6143 [inline]
       ext4_free_blocks+0x1bab/0x2640 fs/ext4/mballoc.c:6273
       ext4_remove_blocks fs/ext4/extents.c:2525 [inline]
       ext4_ext_rm_leaf fs/ext4/extents.c:2691 [inline]
       ext4_ext_remove_space+0x1f0d/0x4490 fs/ext4/extents.c:2939
       ext4_ext_truncate+0x211/0x370 fs/ext4/extents.c:4469
       ext4_truncate+0xa0b/0x1230 fs/ext4/inode.c:4289
       ext4_process_orphan+0x1cb/0x300 fs/ext4/orphan.c:339
       ext4_orphan_cleanup+0xbd3/0x1400 fs/ext4/orphan.c:474
       __ext4_fill_super fs/ext4/super.c:5523 [inline]
       ext4_fill_super+0x7b5e/0x80d0 fs/ext4/super.c:5654
       get_tree_bdev+0x3f1/0x610 fs/super.c:1366
       vfs_get_tree+0x88/0x270 fs/super.c:1573
       do_new_mount+0x24a/0xa40 fs/namespace.c:3057
       do_mount fs/namespace.c:3400 [inline]
       __do_sys_mount fs/namespace.c:3608 [inline]
       __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3585
       do_syscall_x64 arch/x86/entry/common.c:51 [inline]
       do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

other info that might help us debug this:

Chain exists of:
  &dquot->dq_lock --> jbd2_handle --> &ei->i_data_sem

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ei->i_data_sem);
                               lock(jbd2_handle);
                               lock(&ei->i_data_sem);
  lock(&dquot->dq_lock);

 *** DEADLOCK ***

4 locks held by syz.5.699/7194:
 #0: ffff8880762ce0e0 (&type->s_umount_key#27/1){+.+.}-{3:3}, at: alloc_super+0x1fa/0x930 fs/super.c:228
 #1: ffff888056b67258 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
 #1: ffff888056b67258 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_process_orphan+0x187/0x300 fs/ext4/orphan.c:337
 #2: ffff888056b670e0 (&ei->i_data_sem){++++}-{3:3}, at: ext4_truncate+0x987/0x1230 fs/ext4/inode.c:4284
 #3: ffffffff8ca74b08 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
 #3: ffffffff8ca74b08 (dquot_srcu){....}-{0:0}, at: srcu_read_lock include/linux/srcu.h:165 [inline]
 #3: ffffffff8ca74b08 (dquot_srcu){....}-{0:0}, at: __dquot_free_space+0x174/0xbc0 fs/quota/dquot.c:1915

stack backtrace:
CPU: 0 PID: 7194 Comm: syz.5.699 Not tainted 6.1.137-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106
 check_noncircular+0x274/0x310 kernel/locking/lockdep.c:2170
 check_prev_add kernel/locking/lockdep.c:3090 [inline]
 check_prevs_add kernel/locking/lockdep.c:3209 [inline]
 validate_chain kernel/locking/lockdep.c:3825 [inline]
 __lock_acquire+0x2cf8/0x7c50 kernel/locking/lockdep.c:5049
 lock_acquire+0x1b4/0x490 kernel/locking/lockdep.c:5662
 __mutex_lock_common kernel/locking/mutex.c:603 [inline]
 __mutex_lock+0x120/0xaf0 kernel/locking/mutex.c:747
 dquot_commit+0x5a/0x410 fs/quota/dquot.c:507
 ext4_write_dquot+0x1f0/0x360 fs/ext4/super.c:6778
 mark_dquot_dirty fs/quota/dquot.c:372 [inline]
 mark_all_dquot_dirty+0xf9/0x400 fs/quota/dquot.c:412
 __dquot_free_space+0x7ec/0xbc0 fs/quota/dquot.c:1942
 dquot_free_space_nodirty include/linux/quotaops.h:379 [inline]
 dquot_free_space include/linux/quotaops.h:384 [inline]
 dquot_free_block include/linux/quotaops.h:395 [inline]
 ext4_mb_clear_bb fs/ext4/mballoc.c:6143 [inline]
 ext4_free_blocks+0x1bab/0x2640 fs/ext4/mballoc.c:6273
 ext4_remove_blocks fs/ext4/extents.c:2525 [inline]
 ext4_ext_rm_leaf fs/ext4/extents.c:2691 [inline]
 ext4_ext_remove_space+0x1f0d/0x4490 fs/ext4/extents.c:2939
 ext4_ext_truncate+0x211/0x370 fs/ext4/extents.c:4469
 ext4_truncate+0xa0b/0x1230 fs/ext4/inode.c:4289
 ext4_process_orphan+0x1cb/0x300 fs/ext4/orphan.c:339
 ext4_orphan_cleanup+0xbd3/0x1400 fs/ext4/orphan.c:474
 __ext4_fill_super fs/ext4/super.c:5523 [inline]
 ext4_fill_super+0x7b5e/0x80d0 fs/ext4/super.c:5654
 get_tree_bdev+0x3f1/0x610 fs/super.c:1366
 vfs_get_tree+0x88/0x270 fs/super.c:1573
 do_new_mount+0x24a/0xa40 fs/namespace.c:3057
 do_mount fs/namespace.c:3400 [inline]
 __do_sys_mount fs/namespace.c:3608 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3585
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1e3659010a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 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:00007f1e3736be68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f1e3736bef0 RCX: 00007f1e3659010a
RDX: 00002000000000c0 RSI: 0000200000000640 RDI: 00007f1e3736beb0
RBP: 00002000000000c0 R08: 00007f1e3736bef0 R09: 0000000003000010
R10: 0000000003000010 R11: 0000000000000246 R12: 0000200000000640
R13: 00007f1e3736beb0 R14: 000000000000051b R15: 0000200000000000
 </TASK>
EXT4-fs error (device loop5): ext4_do_update_inode:5253: inode #16: comm syz.5.699: corrupted inode contents
EXT4-fs error (device loop5): ext4_dirty_inode:6118: inode #16: comm syz.5.699: mark_inode_dirty error
EXT4-fs error (device loop5): ext4_do_update_inode:5253: inode #16: comm syz.5.699: corrupted inode contents
EXT4-fs error (device loop5): __ext4_ext_dirty:202: inode #16: comm syz.5.699: mark_inode_dirty error
EXT4-fs error (device loop5): ext4_do_update_inode:5253: inode #16: comm syz.5.699: corrupted inode contents
EXT4-fs error (device loop5) in ext4_orphan_del:305: Corrupt filesystem
EXT4-fs error (device loop5): ext4_do_update_inode:5253: inode #16: comm syz.5.699: corrupted inode contents
EXT4-fs error (device loop5): ext4_truncate:4312: inode #16: comm syz.5.699: mark_inode_dirty error
EXT4-fs error (device loop5) in ext4_process_orphan:347: Corrupt filesystem
EXT4-fs (loop5): 1 truncate cleaned up
EXT4-fs (loop5): mounted filesystem without journal. Quota mode: writeback.
ext4 filesystem being mounted at /89/file1 supports timestamps until 2038-01-19 (0x7fffffff)