EXT4-fs (loop3): mounted filesystem without journal. Quota mode: writeback.
======================================================
WARNING: possible circular locking dependency detected
6.1.113-syzkaller #0 Not tainted
------------------------------------------------------
syz.3.2448/10215 is trying to acquire lock:
ffff0000e0f9dcd0 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_map_blocks+0x77c/0x1810 fs/ext4/inode.c:671

but task is already holding lock:
ffff0000edaee208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x11c/0x188 fs/quota/quota_v2.c:357

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&s->s_dquot.dqio_sem){++++}-{3:3}:
       down_read+0x64/0x308 kernel/locking/rwsem.c:1520
       v2_read_dquot+0x50/0x11c fs/quota/quota_v2.c:335
       dquot_acquire+0x130/0x5c4 fs/quota/dquot.c:463
       ext4_acquire_dquot+0x270/0x420 fs/ext4/super.c:6797
       dqget+0x660/0xcec fs/quota/dquot.c:986
       dquot_set_dqblk+0x40/0xea8 fs/quota/dquot.c:2831
       quota_setquota+0x5bc/0x6f0 fs/quota/quota.c:310
       do_quotactl+0x508/0x698 fs/quota/quota.c:802
       __do_sys_quotactl fs/quota/quota.c:960 [inline]
       __se_sys_quotactl fs/quota/quota.c:916 [inline]
       __arm64_sys_quotactl+0x2d8/0x7a0 fs/quota/quota.c:916
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
       do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:204
       el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
       el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
       el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

-> #1 (&dquot->dq_lock){+.+.}-{3:3}:
       __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603
       __mutex_lock kernel/locking/mutex.c:747 [inline]
       mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
       dquot_commit+0x54/0x240 fs/quota/dquot.c:507
       ext4_write_dquot+0x1b4/0x314 fs/ext4/super.c:6777
       ext4_mark_dquot_dirty+0xe8/0x140 fs/ext4/super.c:6837
       mark_dquot_dirty fs/quota/dquot.c:372 [inline]
       mark_all_dquot_dirty+0x108/0x424 fs/quota/dquot.c:412
       __dquot_free_space+0x840/0xce4 fs/quota/dquot.c:1940
       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+0x1b14/0x2b64 fs/ext4/mballoc.c:6273
       ext4_remove_blocks fs/ext4/extents.c:2507 [inline]
       ext4_ext_rm_leaf fs/ext4/extents.c:2691 [inline]
       ext4_ext_remove_space+0x1ad0/0x4544 fs/ext4/extents.c:2939
       ext4_ext_truncate+0x168/0x210 fs/ext4/extents.c:4469
       ext4_truncate+0xa08/0x1178 fs/ext4/inode.c:4288
       ext4_evict_inode+0xc3c/0x12cc fs/ext4/inode.c:286
       evict+0x418/0x894 fs/inode.c:701
       iput_final fs/inode.c:1830 [inline]
       iput+0x7c0/0x8a4 fs/inode.c:1856
       dentry_unlink_inode+0x37c/0x4bc fs/dcache.c:405
       __dentry_kill+0x324/0x5e4 fs/dcache.c:611
       dentry_kill+0xc8/0x250
       dput+0x218/0x454 fs/dcache.c:918
       do_renameat2+0x9f8/0xe64 fs/namei.c:5029
       __do_sys_renameat2 fs/namei.c:5060 [inline]
       __se_sys_renameat2 fs/namei.c:5057 [inline]
       __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5057
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
       do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:204
       el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
       el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
       el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

-> #0 (&ei->i_data_sem/2){++++}-{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+0x3338/0x7680 kernel/locking/lockdep.c:5049
       lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662
       down_write+0x5c/0x88 kernel/locking/rwsem.c:1573
       ext4_map_blocks+0x77c/0x1810 fs/ext4/inode.c:671
       ext4_getblk+0x198/0x6ec fs/ext4/inode.c:889
       ext4_bread+0x3c/0x1b0 fs/ext4/inode.c:945
       ext4_quota_write+0x230/0x54c fs/ext4/super.c:7171
       write_blk fs/quota/quota_tree.c:70 [inline]
       get_free_dqblk+0x28c/0x598 fs/quota/quota_tree.c:136
       do_insert_tree+0x204/0xec4 fs/quota/quota_tree.c:347
       do_insert_tree+0x834/0xec4 fs/quota/quota_tree.c:402
       do_insert_tree+0x7fc/0xec4 fs/quota/quota_tree.c:402
       dq_insert_tree fs/quota/quota_tree.c:432 [inline]
       qtree_write_dquot+0x3c8/0x4d8 fs/quota/quota_tree.c:451
       v2_write_dquot+0xf4/0x188 fs/quota/quota_v2.c:361
       dquot_acquire+0x2c4/0x5c4 fs/quota/dquot.c:472
       ext4_acquire_dquot+0x270/0x420 fs/ext4/super.c:6797
       dqget+0x660/0xcec fs/quota/dquot.c:986
       __dquot_initialize+0x2c8/0xc04 fs/quota/dquot.c:1515
       dquot_initialize+0x24/0x34 fs/quota/dquot.c:1577
       ext4_cross_rename fs/ext4/namei.c:4116 [inline]
       ext4_rename2+0x7b0/0x3420 fs/ext4/namei.c:4254
       vfs_rename+0xac8/0xe04 fs/namei.c:4874
       do_renameat2+0x9ec/0xe64 fs/namei.c:5027
       __do_sys_renameat2 fs/namei.c:5060 [inline]
       __se_sys_renameat2 fs/namei.c:5057 [inline]
       __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5057
       __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
       invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
       el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
       do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:204
       el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
       el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
       el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

other info that might help us debug this:

Chain exists of:
  &ei->i_data_sem/2 --> &dquot->dq_lock --> &s->s_dquot.dqio_sem

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&s->s_dquot.dqio_sem);
                               lock(&dquot->dq_lock);
                               lock(&s->s_dquot.dqio_sem);
  lock(&ei->i_data_sem/2);

 *** DEADLOCK ***

5 locks held by syz.3.2448/10215:
 #0: ffff0000edaee460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:393
 #1: ffff0000e0f9a218 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_renameat2+0x538/0xe64 fs/namei.c:4966
 #2: ffff0000e0f99810 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
 #2: ffff0000e0f99810 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: vfs_rename+0x6b0/0xe04 fs/namei.c:4843
 #3: ffff0000df2727a8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_acquire+0x68/0x5c4 fs/quota/dquot.c:460
 #4: ffff0000edaee208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x11c/0x188 fs/quota/quota_v2.c:357

stack backtrace:
CPU: 1 PID: 10215 Comm: syz.3.2448 Not tainted 6.1.113-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2048
 check_noncircular+0x2cc/0x378 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+0x3338/0x7680 kernel/locking/lockdep.c:5049
 lock_acquire+0x26c/0x7cc kernel/locking/lockdep.c:5662
 down_write+0x5c/0x88 kernel/locking/rwsem.c:1573
 ext4_map_blocks+0x77c/0x1810 fs/ext4/inode.c:671
 ext4_getblk+0x198/0x6ec fs/ext4/inode.c:889
 ext4_bread+0x3c/0x1b0 fs/ext4/inode.c:945
 ext4_quota_write+0x230/0x54c fs/ext4/super.c:7171
 write_blk fs/quota/quota_tree.c:70 [inline]
 get_free_dqblk+0x28c/0x598 fs/quota/quota_tree.c:136
 do_insert_tree+0x204/0xec4 fs/quota/quota_tree.c:347
 do_insert_tree+0x834/0xec4 fs/quota/quota_tree.c:402
 do_insert_tree+0x7fc/0xec4 fs/quota/quota_tree.c:402
 dq_insert_tree fs/quota/quota_tree.c:432 [inline]
 qtree_write_dquot+0x3c8/0x4d8 fs/quota/quota_tree.c:451
 v2_write_dquot+0xf4/0x188 fs/quota/quota_v2.c:361
 dquot_acquire+0x2c4/0x5c4 fs/quota/dquot.c:472
 ext4_acquire_dquot+0x270/0x420 fs/ext4/super.c:6797
 dqget+0x660/0xcec fs/quota/dquot.c:986
 __dquot_initialize+0x2c8/0xc04 fs/quota/dquot.c:1515
 dquot_initialize+0x24/0x34 fs/quota/dquot.c:1577
 ext4_cross_rename fs/ext4/namei.c:4116 [inline]
 ext4_rename2+0x7b0/0x3420 fs/ext4/namei.c:4254
 vfs_rename+0xac8/0xe04 fs/namei.c:4874
 do_renameat2+0x9ec/0xe64 fs/namei.c:5027
 __do_sys_renameat2 fs/namei.c:5060 [inline]
 __se_sys_renameat2 fs/namei.c:5057 [inline]
 __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5057
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585