======================================================
WARNING: possible circular locking dependency detected
6.2.0-syzkaller-06695-gd8ca6dbb8de7 #0 Not tainted
------------------------------------------------------
syz-executor.2/1365 is trying to acquire lock:
ffff88808c0c3808 (&ei->i_data_sem/1){+.+.}-{3:3}, at: ext4_double_down_write_data_sem fs/ext4/move_extent.c:58 [inline]
ffff88808c0c3808 (&ei->i_data_sem/1){+.+.}-{3:3}, at: ext4_move_extents+0x9cc/0x4ff0 fs/ext4/move_extent.c:620
but task is already holding lock:
ffff88803cecf308 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_double_down_write_data_sem fs/ext4/move_extent.c:57 [inline]
ffff88803cecf308 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_move_extents+0x9bd/0x4ff0 fs/ext4/move_extent.c:620
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&ei->i_data_sem/2){++++}-{3:3}:
down_read+0x3d/0x50 kernel/locking/rwsem.c:1520
ext4_map_blocks+0x267/0x18d0 fs/ext4/inode.c:574
ext4_getblk+0x61f/0x850 fs/ext4/inode.c:864
ext4_bread+0x2e/0x190 fs/ext4/inode.c:920
ext4_quota_write+0x218/0x620 fs/ext4/super.c:7089
write_blk+0x12e/0x220 fs/quota/quota_tree.c:64
get_free_dqblk+0x104/0x2f0 fs/quota/quota_tree.c:130
do_insert_tree+0x3c5/0x12d0 fs/quota/quota_tree.c:340
do_insert_tree+0x113e/0x12d0 fs/quota/quota_tree.c:375
dq_insert_tree fs/quota/quota_tree.c:401 [inline]
qtree_write_dquot+0x3b4/0x570 fs/quota/quota_tree.c:420
v2_write_dquot+0x120/0x250 fs/quota/quota_v2.c:358
dquot_acquire+0x3d1/0x6c0 fs/quota/dquot.c:444
ext4_acquire_dquot+0x2b1/0x3d0 fs/ext4/super.c:6724
dqget+0x67d/0x1080 fs/quota/dquot.c:914
__dquot_initialize+0x560/0xbe0 fs/quota/dquot.c:1492
ext4_set_acl+0x167/0x5f0 fs/ext4/acl.c:238
set_posix_acl+0x25b/0x320 fs/posix_acl.c:956
vfs_set_acl+0x493/0x950 fs/posix_acl.c:1098
do_set_acl+0xda/0x1b0 fs/posix_acl.c:1247
do_setxattr+0xc6/0x190 fs/xattr.c:606
setxattr+0x146/0x160 fs/xattr.c:632
path_setxattr+0x197/0x1c0 fs/xattr.c:651
__do_sys_setxattr fs/xattr.c:667 [inline]
__se_sys_setxattr fs/xattr.c:663 [inline]
__x64_sys_setxattr+0xc4/0x160 fs/xattr.c:663
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
-> #2 (&s->s_dquot.dqio_sem){++++}-{3:3}:
down_read+0x3d/0x50 kernel/locking/rwsem.c:1520
v2_read_dquot+0x4d/0x120 fs/quota/quota_v2.c:332
dquot_acquire+0x1b3/0x6c0 fs/quota/dquot.c:435
ext4_acquire_dquot+0x2b1/0x3d0 fs/ext4/super.c:6724
dqget+0x67d/0x1080 fs/quota/dquot.c:914
__dquot_initialize+0x560/0xbe0 fs/quota/dquot.c:1492
ext4_create+0x94/0x4e0 fs/ext4/namei.c:2802
lookup_open.isra.0+0x105a/0x1400 fs/namei.c:3416
open_last_lookups fs/namei.c:3484 [inline]
path_openat+0x975/0x2750 fs/namei.c:3712
do_filp_open+0x1ba/0x410 fs/namei.c:3742
do_sys_openat2+0x16d/0x4c0 fs/open.c:1312
do_sys_open fs/open.c:1328 [inline]
__do_sys_creat fs/open.c:1404 [inline]
__se_sys_creat fs/open.c:1398 [inline]
__x64_sys_creat+0xcd/0x120 fs/open.c:1398
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
-> #1 (&dquot->dq_lock){+.+.}-{3:3}:
__mutex_lock_common kernel/locking/mutex.c:603 [inline]
__mutex_lock+0x12f/0x1350 kernel/locking/mutex.c:747
dquot_commit+0x51/0x570 fs/quota/dquot.c:479
ext4_write_dquot+0x25f/0x330 fs/ext4/super.c:6708
ext4_mark_dquot_dirty fs/ext4/super.c:6756 [inline]
ext4_mark_dquot_dirty+0x115/0x1b0 fs/ext4/super.c:6750
mark_dquot_dirty fs/quota/dquot.c:346 [inline]
mark_all_dquot_dirty fs/quota/dquot.c:384 [inline]
__dquot_alloc_space+0x5f9/0xb80 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+0x60f/0x51f0 fs/ext4/mballoc.c:5571
ext4_new_meta_blocks+0x302/0x360 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+0x1034/0x4130 fs/ext4/extents.c:2102
ext4_split_extent_at+0x497/0xe10 fs/ext4/extents.c:3253
ext4_force_split_extent_at fs/ext4/extents.c:338 [inline]
ext4_swap_extents+0x7ba/0x1470 fs/ext4/extents.c:5722
move_extent_per_page fs/ext4/move_extent.c:372 [inline]
ext4_move_extents+0x21ec/0x4ff0 fs/ext4/move_extent.c:682
__ext4_ioctl+0x3f0d/0x4c90 fs/ext4/ioctl.c:1354
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 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 kernel/locking/lockdep.c:3832 [inline]
__lock_acquire+0x2ec7/0x5d40 kernel/locking/lockdep.c:5056
lock_acquire kernel/locking/lockdep.c:5669 [inline]
lock_acquire+0x1e3/0x670 kernel/locking/lockdep.c:5634
down_write_nested+0x96/0x200 kernel/locking/rwsem.c:1689
ext4_double_down_write_data_sem fs/ext4/move_extent.c:58 [inline]
ext4_move_extents+0x9cc/0x4ff0 fs/ext4/move_extent.c:620
__ext4_ioctl+0x3f0d/0x4c90 fs/ext4/ioctl.c:1354
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 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.2/1365:
#0: ffff88814b578460 (sb_writers#5){.+.+}-{0:0}, at: __ext4_ioctl+0x3427/0x4c90 fs/ext4/ioctl.c:1350
#1: ffff88803cecf480 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline]
#1: ffff88803cecf480 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: lock_two_nondirectories+0xf0/0x110 fs/inode.c:1122
#2: ffff88808c0c3980 (&sb->s_type->i_mutex_key#7/4){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline]
#2: ffff88808c0c3980 (&sb->s_type->i_mutex_key#7/4){+.+.}-{3:3}, at: lock_two_nondirectories+0xd5/0x110 fs/inode.c:1124
#3: ffff88803cecf308 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_double_down_write_data_sem fs/ext4/move_extent.c:57 [inline]
#3: ffff88803cecf308 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_move_extents+0x9bd/0x4ff0 fs/ext4/move_extent.c:620
stack backtrace:
CPU: 1 PID: 1365 Comm: syz-executor.2 Not tainted 6.2.0-syzkaller-06695-gd8ca6dbb8de7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
check_noncircular+0x25f/0x2e0 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 kernel/locking/lockdep.c:3832 [inline]
__lock_acquire+0x2ec7/0x5d40 kernel/locking/lockdep.c:5056
lock_acquire kernel/locking/lockdep.c:5669 [inline]
lock_acquire+0x1e3/0x670 kernel/locking/lockdep.c:5634
down_write_nested+0x96/0x200 kernel/locking/rwsem.c:1689
ext4_double_down_write_data_sem fs/ext4/move_extent.c:58 [inline]
ext4_move_extents+0x9cc/0x4ff0 fs/ext4/move_extent.c:620
__ext4_ioctl+0x3f0d/0x4c90 fs/ext4/ioctl.c:1354
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x197/0x210 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fccf6e8c0f9
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:00007fccf7b39168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fccf6fac120 RCX: 00007fccf6e8c0f9
RDX: 0000000020000080 RSI: 00000000c028660f RDI: 0000000000000005
RBP: 00007fccf6ee7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcf8461cdf R14: 00007fccf7b39300 R15: 0000000000022000
</TASK>