======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.3.633/12219 is trying to acquire lock:
ffff88804eba5b90 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}
, at: ocfs2_try_remove_refcount_tree+0xb6/0x360 fs/ocfs2/refcounttree.c:959

but task is already holding lock:
ffff88804eba5c18 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xa4/0x360 fs/ocfs2/refcounttree.c:958

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&oi->ip_xattr_sem){++++}-{4:4}:
       down_read+0x92/0x200 kernel/locking/rwsem.c:1574
       ocfs2_xattr_get+0xf4/0x260 fs/ocfs2/xattr.c:1575
       __vfs_getxattr+0x412/0x440 fs/xattr.c:446
       smk_fetch+0xb4/0x140 security/smack/smack_lsm.c:298
       smack_d_instantiate+0x5b5/0x810 security/smack/smack_lsm.c:3682
       security_d_instantiate+0x106/0x1d0 security/security.c:3782
       d_instantiate+0x54/0xb0 fs/dcache.c:2251
       ocfs2_mknod+0x199c/0x21a0 fs/ocfs2/namei.c:454
       ocfs2_mkdir+0x180/0x430 fs/ocfs2/namei.c:662
       vfs_mkdir+0x414/0x630 fs/namei.c:5420
       filename_mkdirat+0x289/0x520 fs/namei.c:5453
       __do_sys_mkdirat fs/namei.c:5474 [inline]
       __se_sys_mkdirat+0x35/0x150 fs/namei.c:5471
       do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
       do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
       down_read+0x92/0x200 kernel/locking/rwsem.c:1574
       ocfs2_start_trans+0x3aa/0x700 fs/ocfs2/journal.c:369
       ocfs2_block_group_alloc fs/ocfs2/suballoc.c:801 [inline]
       ocfs2_reserve_suballoc_bits+0x7b7/0x4850 fs/ocfs2/suballoc.c:950
       ocfs2_reserve_new_metadata_blocks+0x415/0x9a0 fs/ocfs2/suballoc.c:1100
       ocfs2_mknod+0xe5f/0x21a0 fs/ocfs2/namei.c:351
       ocfs2_mkdir+0x180/0x430 fs/ocfs2/namei.c:662
       vfs_mkdir+0x414/0x630 fs/namei.c:5420
       filename_mkdirat+0x289/0x520 fs/namei.c:5453
       __do_sys_mkdir fs/namei.c:5480 [inline]
       __se_sys_mkdir+0x34/0x150 fs/namei.c:5477
       do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
       do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (sb_internal#2){.+.+}-{0:0}:
       percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline]
       percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline]
       __sb_start_write include/linux/fs/super.h:19 [inline]
       sb_start_intwrite include/linux/fs/super.h:177 [inline]
       ocfs2_start_trans+0x2a7/0x700 fs/ocfs2/journal.c:367
       ocfs2_setattr+0x114b/0x1d10 fs/ocfs2/file.c:1263
       notify_change+0xbb8/0xec0 fs/attr.c:556
       chown_common+0x412/0x630 fs/open.c:825
       vfs_fchown fs/open.c:890 [inline]
       ksys_fchown+0xe9/0x160 fs/open.c:902
       __do_sys_fchown fs/open.c:907 [inline]
       __se_sys_fchown fs/open.c:905 [inline]
       __x64_sys_fchown+0x7a/0x90 fs/open.c:905
       do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
       do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}:
       check_prev_add kernel/locking/lockdep.c:3209 [inline]
       check_prevs_add kernel/locking/lockdep.c:3328 [inline]
       validate_chain kernel/locking/lockdep.c:3952 [inline]
       __lock_acquire+0x164c/0x2de0 kernel/locking/lockdep.c:5288
       lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942
       down_write+0x35/0x50 kernel/locking/rwsem.c:1631
       ocfs2_try_remove_refcount_tree+0xb6/0x360 fs/ocfs2/refcounttree.c:959
       ocfs2_truncate_file+0xe91/0x14b0 fs/ocfs2/file.c:527
       ocfs2_setattr+0x1641/0x1d10 fs/ocfs2/file.c:1224
       notify_change+0xbb8/0xec0 fs/attr.c:556
       do_truncate+0x1c2/0x250 fs/open.c:68
       handle_truncate fs/namei.c:4300 [inline]
       do_open fs/namei.c:4849 [inline]
       path_openat+0x18ab/0x2100 fs/namei.c:5010
       do_file_open+0x23e/0x4a0 fs/namei.c:5039
       do_sys_openat2+0x115/0x200 fs/open.c:1442
       do_sys_open fs/open.c:1448 [inline]
       __do_sys_openat fs/open.c:1464 [inline]
       __se_sys_openat fs/open.c:1459 [inline]
       __x64_sys_openat+0x138/0x170 fs/open.c:1459
       do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
       do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  &ocfs2_file_ip_alloc_sem_key --> &journal->j_trans_barrier --> &oi->ip_xattr_sem

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&oi->ip_xattr_sem);
                               lock(&journal->j_trans_barrier);
                               lock(&oi->ip_xattr_sem);
  lock(&ocfs2_file_ip_alloc_sem_key);

 *** DEADLOCK ***

locks held by syz.3.633/12219: 3, last CPU#1:
 #0: ffff888029e4e510 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:531
 #1: ffff88804eba5f40 (&sb->s_type->i_mutex_key#27){++++}-{4:4}, at: inode_lock_killable include/linux/fs.h:1029 [inline]
 #1: ffff88804eba5f40 (&sb->s_type->i_mutex_key#27){++++}-{4:4}, at: do_truncate+0x18f/0x250 fs/open.c:63
 #2: ffff88804eba5c18 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_try_remove_refcount_tree+0xa4/0x360 fs/ocfs2/refcounttree.c:958

stack backtrace:
CPU: 1 UID: 0 PID: 12219 Comm: syz.3.633 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_circular_bug+0x2e2/0x300 kernel/locking/lockdep.c:2087
 check_noncircular+0x12f/0x150 kernel/locking/lockdep.c:2219
 check_prev_add kernel/locking/lockdep.c:3209 [inline]
 check_prevs_add kernel/locking/lockdep.c:3328 [inline]
 validate_chain kernel/locking/lockdep.c:3952 [inline]
 __lock_acquire+0x164c/0x2de0 kernel/locking/lockdep.c:5288
 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942
 down_write+0x35/0x50 kernel/locking/rwsem.c:1631
 ocfs2_try_remove_refcount_tree+0xb6/0x360 fs/ocfs2/refcounttree.c:959
 ocfs2_truncate_file+0xe91/0x14b0 fs/ocfs2/file.c:527
 ocfs2_setattr+0x1641/0x1d10 fs/ocfs2/file.c:1224
 notify_change+0xbb8/0xec0 fs/attr.c:556
 do_truncate+0x1c2/0x250 fs/open.c:68
 handle_truncate fs/namei.c:4300 [inline]
 do_open fs/namei.c:4849 [inline]
 path_openat+0x18ab/0x2100 fs/namei.c:5010
 do_file_open+0x23e/0x4a0 fs/namei.c:5039
 do_sys_openat2+0x115/0x200 fs/open.c:1442
 do_sys_open fs/open.c:1448 [inline]
 __do_sys_openat fs/open.c:1464 [inline]
 __se_sys_openat fs/open.c:1459 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1459
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd1390df559
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fd136ec9028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fd139366270 RCX: 00007fd1390df559
RDX: 000000000000275a RSI: 00002000000006c0 RDI: ffffffffffffff9c
RBP: 00007fd139176b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd139366308 R14: 00007fd139366270 R15: 00007fff20a09198
 </TASK>