======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.3.8517/24655 is trying to acquire lock:
ffff888076f8ed98 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
ffff888076f8ed98 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}, at: ocfs2_xattr_set+0xbe8/0x13a0 fs/ocfs2/xattr.c:3628

but task is already holding lock:
ffff888076f886f8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_xattr_set+0x495/0x13a0 fs/ocfs2/xattr.c:3589

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (&oi->ip_xattr_sem){++++}-{3:3}:
       down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520
       ocfs2_init_acl+0x30a/0x770 fs/ocfs2/acl.c:366
       ocfs2_mknod+0x1427/0x2310 fs/ocfs2/namei.c:410
       vfs_mknod+0x325/0x360 fs/namei.c:4046
       do_mknodat+0x386/0x500 fs/namei.c:-1
       __do_sys_mknod fs/namei.c:4129 [inline]
       __se_sys_mknod fs/namei.c:4127 [inline]
       __x64_sys_mknod+0x8e/0xa0 fs/namei.c:4127
       do_syscall_x64 arch/x86/entry/common.c:46 [inline]
       do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #3 (&journal->j_trans_barrier){.+.+}-{3:3}:
       down_read+0x46/0x2e0 kernel/locking/rwsem.c:1520
       ocfs2_start_trans+0x3a8/0x6f0 fs/ocfs2/journal.c:372
       ocfs2_mknod+0xf33/0x2310 fs/ocfs2/namei.c:361
       ocfs2_create+0x196/0x430 fs/ocfs2/namei.c:674
       lookup_open fs/namei.c:3539 [inline]
       open_last_lookups fs/namei.c:3607 [inline]
       path_openat+0x1705/0x3270 fs/namei.c:3841
       do_filp_open+0x1f2/0x430 fs/namei.c:3871
       do_sys_openat2+0x134/0x1d0 fs/open.c:1422
       do_sys_open fs/open.c:1437 [inline]
       __do_sys_open fs/open.c:1445 [inline]
       __se_sys_open fs/open.c:1441 [inline]
       __x64_sys_open+0x11f/0x140 fs/open.c:1441
       do_syscall_x64 arch/x86/entry/common.c:46 [inline]
       do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #2 (sb_internal#2){.+.+}-{0:0}:
       percpu_down_read include/linux/percpu-rwsem.h:51 [inline]
       __sb_start_write include/linux/fs.h:1633 [inline]
       sb_start_intwrite include/linux/fs.h:1755 [inline]
       ocfs2_start_trans+0x2a9/0x6f0 fs/ocfs2/journal.c:370
       ocfs2_shutdown_local_alloc+0x1f7/0xac0 fs/ocfs2/localalloc.c:416
       ocfs2_dismount_volume+0x1e5/0x890 fs/ocfs2/super.c:1881
       generic_shutdown_super+0x134/0x2b0 fs/super.c:693
       kill_block_super+0x44/0x90 fs/super.c:1668
       deactivate_locked_super+0x97/0x100 fs/super.c:481
       cleanup_mnt+0x3d7/0x460 fs/namespace.c:1259
       task_work_run+0x1d4/0x260 kernel/task_work.c:245
       resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
       exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
       exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
       __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
       syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
       do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#6){+.+.}-{3:3}:
       down_write+0x97/0x200 kernel/locking/rwsem.c:1573
       inode_lock include/linux/fs.h:804 [inline]
       __ocfs2_flush_truncate_log+0x352/0x1130 fs/ocfs2/alloc.c:6046
       ocfs2_flush_truncate_log+0x4f/0x60 fs/ocfs2/alloc.c:6076
       ocfs2_sync_fs+0x11d/0x330 fs/ocfs2/super.c:402
       sync_filesystem+0x1c2/0x220 fs/sync.c:66
       ocfs2_remount+0x119/0xb40 fs/ocfs2/super.c:611
       reconfigure_super+0x229/0x8e0 fs/super.c:1151
       do_remount fs/namespace.c:2927 [inline]
       path_mount+0xcfe/0xfa0 fs/namespace.c:3705
       do_mount fs/namespace.c:3726 [inline]
       __do_sys_mount fs/namespace.c:3935 [inline]
       __se_sys_mount+0x2e7/0x3d0 fs/namespace.c:3912
       do_syscall_x64 arch/x86/entry/common.c:46 [inline]
       do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

-> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3134 [inline]
       check_prevs_add kernel/locking/lockdep.c:3253 [inline]
       validate_chain kernel/locking/lockdep.c:3869 [inline]
       __lock_acquire+0x37ef/0x7d80 kernel/locking/lockdep.c:5137
       lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754
       down_write+0x97/0x200 kernel/locking/rwsem.c:1573
       inode_lock include/linux/fs.h:804 [inline]
       ocfs2_xattr_set+0xbe8/0x13a0 fs/ocfs2/xattr.c:3628
       __vfs_setxattr+0x437/0x470 fs/xattr.c:201
       __vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:235
       vfs_setxattr+0x16b/0x2f0 fs/xattr.c:322
       do_setxattr fs/xattr.c:630 [inline]
       path_setxattr+0x33a/0x590 fs/xattr.c:659
       __do_sys_lsetxattr fs/xattr.c:684 [inline]
       __se_sys_lsetxattr fs/xattr.c:680 [inline]
       __x64_sys_lsetxattr+0xb8/0xd0 fs/xattr.c:680
       do_syscall_x64 arch/x86/entry/common.c:46 [inline]
       do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
       entry_SYSCALL_64_after_hwframe+0x68/0xd2

other info that might help us debug this:

Chain exists of:
  &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5 --> &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_sysfile_lock_key[args->fi_sysfile_type]#5);

 *** DEADLOCK ***

3 locks held by syz.3.8517/24655:
 #0: ffff8880246e4418 (sb_writers#14){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:412
 #1: ffff888076f889d8 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
 #1: ffff888076f889d8 (&sb->s_type->i_mutex_key#21){+.+.}-{3:3}, at: vfs_setxattr+0x144/0x2f0 fs/xattr.c:321
 #2: ffff888076f886f8 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_xattr_set+0x495/0x13a0 fs/ocfs2/xattr.c:3589

stack backtrace:
CPU: 0 PID: 24655 Comm: syz.3.8517 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
 check_noncircular+0x2fc/0x400 kernel/locking/lockdep.c:2187
 check_prev_add kernel/locking/lockdep.c:3134 [inline]
 check_prevs_add kernel/locking/lockdep.c:3253 [inline]
 validate_chain kernel/locking/lockdep.c:3869 [inline]
 __lock_acquire+0x37ef/0x7d80 kernel/locking/lockdep.c:5137
 lock_acquire+0x19e/0x420 kernel/locking/lockdep.c:5754
 down_write+0x97/0x200 kernel/locking/rwsem.c:1573
 inode_lock include/linux/fs.h:804 [inline]
 ocfs2_xattr_set+0xbe8/0x13a0 fs/ocfs2/xattr.c:3628
 __vfs_setxattr+0x437/0x470 fs/xattr.c:201
 __vfs_setxattr_noperm+0x12a/0x5e0 fs/xattr.c:235
 vfs_setxattr+0x16b/0x2f0 fs/xattr.c:322
 do_setxattr fs/xattr.c:630 [inline]
 path_setxattr+0x33a/0x590 fs/xattr.c:659
 __do_sys_lsetxattr fs/xattr.c:684 [inline]
 __se_sys_lsetxattr fs/xattr.c:680 [inline]
 __x64_sys_lsetxattr+0xb8/0xd0 fs/xattr.c:680
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7e2e59e159
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:00007f7e2f480028 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 00007f7e2e825fa0 RCX: 00007f7e2e59e159
RDX: 0000000000000000 RSI: 0000200000000200 RDI: 0000200000000280
RBP: 00007f7e2e63503b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7e2e826038 R14: 00007f7e2e825fa0 R15: 00007ffd5146a478
 </TASK>