======================================================
WARNING: possible circular locking dependency detected
6.1.0-rc6-next-20221122 #1 Not tainted
------------------------------------------------------
syz-executor.3/61767 is trying to acquire lock:
ffff8880107be170 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x162/0x310

but task is already holding lock:
ffff8880107bcb90 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x17b/0x540

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&sbi->s_writepages_rwsem){++++}-{0:0}:
       percpu_down_write+0x51/0x350
       ext4_ind_migrate+0x23b/0x830
       ext4_fileattr_set+0x1452/0x18c0
       vfs_fileattr_set+0x780/0xb90
       do_vfs_ioctl+0xa6c/0x1af0
       __x64_sys_ioctl+0x110/0x210
       do_syscall_64+0x3f/0x90
       entry_SYSCALL_64_after_hwframe+0x72/0xdc

-> #2 (&sb->s_type->i_mutex_key#6){++++}-{3:3}:
       down_read+0x9c/0x450
       ext4_bmap+0x52/0x470
       bmap+0xb0/0x130
       jbd2_journal_bmap+0xac/0x190
       jbd2_journal_flush+0x857/0xc10
       __ext4_ioctl+0x9b0/0x4340
       __x64_sys_ioctl+0x19e/0x210
       do_syscall_64+0x3f/0x90
       entry_SYSCALL_64_after_hwframe+0x72/0xdc

-> #1 (&journal->j_checkpoint_mutex){+.+.}-{3:3}:
       mutex_lock_io_nested+0x14c/0x1330
       jbd2_journal_flush+0x19e/0xc10
       __ext4_ioctl+0x9b0/0x4340
       __x64_sys_ioctl+0x19e/0x210
       do_syscall_64+0x3f/0x90
       entry_SYSCALL_64_after_hwframe+0x72/0xdc

-> #0 (&journal->j_barrier){+.+.}-{3:3}:
       __lock_acquire+0x2a02/0x5e70
       lock_acquire+0x1a6/0x530
       __mutex_lock+0x136/0x14e0
       jbd2_journal_lock_updates+0x162/0x310
       ext4_change_inode_journal_flag+0x183/0x540
       ext4_fileattr_set+0x142b/0x18c0
       vfs_fileattr_set+0x780/0xb90
       do_vfs_ioctl+0xa6c/0x1af0
       __x64_sys_ioctl+0x110/0x210
       do_syscall_64+0x3f/0x90
       entry_SYSCALL_64_after_hwframe+0x72/0xdc

other info that might help us debug this:

Chain exists of:
  &journal->j_barrier --> &sb->s_type->i_mutex_key#6 --> &sbi->s_writepages_rwsem

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&sbi->s_writepages_rwsem);
                               lock(&sb->s_type->i_mutex_key#6);
                               lock(&sbi->s_writepages_rwsem);
  lock(&journal->j_barrier);

 *** DEADLOCK ***

4 locks held by syz-executor.3/61767:
 #0: ffff8880107ba438 (sb_writers#3){.+.+}-{0:0}, at: do_vfs_ioctl+0xa2f/0x1af0
 #1: ffff888044cabfa0 (&sb->s_type->i_mutex_key#6){++++}-{3:3}, at: vfs_fileattr_set+0x14c/0xb90
 #2: ffff888044cac140 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_change_inode_journal_flag+0x122/0x540
 #3: ffff8880107bcb90 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x17b/0x540

stack backtrace:
CPU: 0 PID: 61767 Comm: syz-executor.3 Not tainted 6.1.0-rc6-next-20221122 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x8f/0xb7
 check_noncircular+0x263/0x2e0
 __lock_acquire+0x2a02/0x5e70
 lock_acquire+0x1a6/0x530
 __mutex_lock+0x136/0x14e0
 jbd2_journal_lock_updates+0x162/0x310
 ext4_change_inode_journal_flag+0x183/0x540
 ext4_fileattr_set+0x142b/0x18c0
 vfs_fileattr_set+0x780/0xb90
 do_vfs_ioctl+0xa6c/0x1af0
 __x64_sys_ioctl+0x110/0x210
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7fed8963eb19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fed86bb4188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fed89751f60 RCX: 00007fed8963eb19
RDX: 0000000020000040 RSI: 0000000040086602 RDI: 0000000000000003
RBP: 00007fed89698f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd7847e64f R14: 00007fed86bb4300 R15: 0000000000022000
 </TASK>
EXT4-fs warning (device sda): verify_group_input:150: Cannot add at group 0 (only 16 groups)
EXT4-fs warning (device sda): verify_group_input:150: Cannot add at group 0 (only 16 groups)
EXT4-fs warning (device sda): verify_group_input:150: Cannot add at group 0 (only 16 groups)
EXT4-fs warning (device sda): verify_group_input:150: Cannot add at group 0 (only 16 groups)
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
Process accounting resumed
9pnet_fd: Insufficient options for proto=fd