======================================================
WARNING: possible circular locking dependency detected
6.3.0-rc3-syzkaller-00031-g1e760fa3596e #0 Not tainted
------------------------------------------------------
syz-executor.0/3402 is trying to acquire lock:
ffff888079c220a0 (&ei->i_data_sem/1){+.+.}-{3:3}, at: ext4_move_extents+0x37d/0xe40 fs/ext4/move_extent.c:620
but task is already holding lock:
ffff8880599aa0a0 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_double_down_write_data_sem+0x2c/0x50
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&ei->i_data_sem/2){++++}-{3:3}:
lock_acquire+0x1e1/0x520 kernel/locking/lockdep.c:5669
down_read+0x3d/0x50 kernel/locking/rwsem.c:1520
ext4_map_blocks+0x38e/0x1cf0 fs/ext4/inode.c:574
ext4_getblk+0x1ef/0x7c0 fs/ext4/inode.c:863
ext4_bread+0x2e/0x180 fs/ext4/inode.c:919
ext4_quota_write+0x222/0x580 fs/ext4/super.c:7135
write_blk fs/quota/quota_tree.c:64 [inline]
get_free_dqblk+0x336/0x690 fs/quota/quota_tree.c:130
do_insert_tree+0x265/0x1a60 fs/quota/quota_tree.c:340
do_insert_tree+0x70f/0x1a60 fs/quota/quota_tree.c:375
dq_insert_tree fs/quota/quota_tree.c:401 [inline]
qtree_write_dquot+0x3bd/0x530 fs/quota/quota_tree.c:420
v2_write_dquot+0x120/0x190 fs/quota/quota_v2.c:358
dquot_acquire+0x351/0x680 fs/quota/dquot.c:444
ext4_acquire_dquot+0x2e6/0x400 fs/ext4/super.c:6770
dqget+0x98f/0xdb0 fs/quota/dquot.c:914
dquot_transfer+0x482/0x6d0 fs/quota/dquot.c:2117
ext4_setattr+0xaef/0x1bc0 fs/ext4/inode.c:5496
notify_change+0xc8b/0xf40 fs/attr.c:482
chown_common+0x500/0x850 fs/open.c:774
do_fchownat+0x16d/0x240 fs/open.c:805
__do_sys_lchown fs/open.c:830 [inline]
__se_sys_lchown fs/open.c:828 [inline]
__x64_sys_lchown+0x85/0x90 fs/open.c:828
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
-> #2 (&s->s_dquot.dqio_sem){++++}-{3:3}:
lock_acquire+0x1e1/0x520 kernel/locking/lockdep.c:5669
down_read+0x3d/0x50 kernel/locking/rwsem.c:1520
v2_read_dquot+0x4e/0x110 fs/quota/quota_v2.c:332
dquot_acquire+0x18c/0x680 fs/quota/dquot.c:435
ext4_acquire_dquot+0x2e6/0x400 fs/ext4/super.c:6770
dqget+0x98f/0xdb0 fs/quota/dquot.c:914
__dquot_initialize+0x2dd/0xe20 fs/quota/dquot.c:1492
ext4_setattr+0x2f9/0x1bc0 fs/ext4/inode.c:5473
notify_change+0xc8b/0xf40 fs/attr.c:482
chown_common+0x500/0x850 fs/open.c:774
do_fchownat+0x16d/0x240 fs/open.c:805
__do_sys_lchown fs/open.c:830 [inline]
__se_sys_lchown fs/open.c:828 [inline]
__x64_sys_lchown+0x85/0x90 fs/open.c:828
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
-> #1 (&dquot->dq_lock){+.+.}-{3:3}:
lock_acquire+0x1e1/0x520 kernel/locking/lockdep.c:5669
__mutex_lock_common+0x1d8/0x2530 kernel/locking/mutex.c:603
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799
dquot_commit+0x5b/0x520 fs/quota/dquot.c:479
ext4_write_dquot+0x1f2/0x2c0 fs/ext4/super.c:6754
mark_dquot_dirty fs/quota/dquot.c:346 [inline]
mark_all_dquot_dirty fs/quota/dquot.c:384 [inline]
__dquot_alloc_space+0x54c/0xf50 fs/quota/dquot.c:1722
dquot_alloc_space_nodirty include/linux/quotaops.h:300 [inline]
dquot_alloc_space include/linux/quotaops.h:313 [inline]
dquot_alloc_block include/linux/quotaops.h:337 [inline]
ext4_mb_new_blocks+0x111a/0x45f0 fs/ext4/mballoc.c:5571
ext4_new_meta_blocks+0x20a/0x4f0 fs/ext4/balloc.c:700
ext4_ext_grow_indepth fs/ext4/extents.c:1329 [inline]
ext4_ext_create_new_leaf fs/ext4/extents.c:1435 [inline]
ext4_ext_insert_extent+0xf47/0x4e60 fs/ext4/extents.c:2102
ext4_split_extent_at+0x812/0x1100 fs/ext4/extents.c:3253
ext4_force_split_extent_at fs/ext4/extents.c:338 [inline]
ext4_swap_extents+0x144e/0x2290 fs/ext4/extents.c:5722
move_extent_per_page+0x1a06/0x3bf0 fs/ext4/move_extent.c:372
ext4_move_extents+0x953/0xe40 fs/ext4/move_extent.c:682
__ext4_ioctl fs/ext4/ioctl.c:1352 [inline]
ext4_ioctl+0x3841/0x5b30 fs/ext4/ioctl.c:1608
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
-> #0 (&ei->i_data_sem/1){+.+.}-{3:3}:
check_prev_add kernel/locking/lockdep.c:3098 [inline]
check_prevs_add kernel/locking/lockdep.c:3217 [inline]
validate_chain+0x166b/0x58e0 kernel/locking/lockdep.c:3832
__lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056
lock_acquire+0x1e1/0x520 kernel/locking/lockdep.c:5669
down_write_nested+0x3d/0x50 kernel/locking/rwsem.c:1689
ext4_move_extents+0x37d/0xe40 fs/ext4/move_extent.c:620
__ext4_ioctl fs/ext4/ioctl.c:1352 [inline]
ext4_ioctl+0x3841/0x5b30 fs/ext4/ioctl.c:1608
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
other info that might help us debug this:
Chain exists of:
&ei->i_data_sem/1 --> &s->s_dquot.dqio_sem --> &ei->i_data_sem/2
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&ei->i_data_sem/2);
lock(&s->s_dquot.dqio_sem);
lock(&ei->i_data_sem/2);
lock(&ei->i_data_sem/1);
*** DEADLOCK ***
4 locks held by syz-executor.0/3402:
#0: ffff888022c30460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write_file+0x5e/0x1f0 fs/namespace.c:438
#1: ffff8880599aa218 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff8880599aa218 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: lock_two_nondirectories+0xe2/0x140 fs/inode.c:1122
#2: ffff888079c22218 (&sb->s_type->i_mutex_key#7/4){+.+.}-{3:3}, at: ext4_move_extents+0x362/0xe40 fs/ext4/move_extent.c:613
#3: ffff8880599aa0a0 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_double_down_write_data_sem+0x2c/0x50
stack backtrace:
CPU: 0 PID: 3402 Comm: syz-executor.0 Not tainted 6.3.0-rc3-syzkaller-00031-g1e760fa3596e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
check_noncircular+0x2fe/0x3b0 kernel/locking/lockdep.c:2178
check_prev_add kernel/locking/lockdep.c:3098 [inline]
check_prevs_add kernel/locking/lockdep.c:3217 [inline]
validate_chain+0x166b/0x58e0 kernel/locking/lockdep.c:3832
__lock_acquire+0x125b/0x1f80 kernel/locking/lockdep.c:5056
lock_acquire+0x1e1/0x520 kernel/locking/lockdep.c:5669
down_write_nested+0x3d/0x50 kernel/locking/rwsem.c:1689
ext4_move_extents+0x37d/0xe40 fs/ext4/move_extent.c:620
__ext4_ioctl fs/ext4/ioctl.c:1352 [inline]
ext4_ioctl+0x3841/0x5b30 fs/ext4/ioctl.c:1608
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl+0xf1/0x160 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff33928c0f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff339fe4168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007ff3393ac050 RCX: 00007ff33928c0f9
RDX: 0000000020000280 RSI: 00000000c028660f RDI: 0000000000000007
RBP: 00007ff3392e7b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffda9f2be6f R14: 00007ff339fe4300 R15: 0000000000022000
</TASK>