======================================================
WARNING: possible circular locking dependency detected
6.1.0-rc8-next-20221208 #1 Not tainted
------------------------------------------------------
syz-executor.0/4987 is trying to acquire lock:
ffff88801076a170 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x162/0x310

but task is already holding lock:
ffff888010768b90 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x17f/0x550

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (&sbi->s_writepages_rwsem){++++}-{0:0}:
       percpu_down_write+0x51/0x350
       ext4_change_inode_journal_flag+0x17f/0x550
       ext4_fileattr_set+0x14fb/0x19f0
       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

-> #3 (mapping.invalidate_lock){++++}-{3:3}:
       down_write+0x94/0x220
       ext4_setattr+0x99d/0x2940
       notify_change+0xca5/0x1400
       do_truncate+0x143/0x200
       do_sys_ftruncate+0x53c/0x720
       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+0x9c5/0x4540
       __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+0x9c5/0x4540
       __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+0x187/0x550
       ext4_fileattr_set+0x14fb/0x19f0
       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 --> mapping.invalidate_lock --> &sbi->s_writepages_rwsem

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&sbi->s_writepages_rwsem);
                               lock(mapping.invalidate_lock);
                               lock(&sbi->s_writepages_rwsem);
  lock(&journal->j_barrier);

 *** DEADLOCK ***

4 locks held by syz-executor.0/4987:
 #0: ffff88801075e438 (sb_writers#3){.+.+}-{0:0}, at: do_vfs_ioctl+0xa2f/0x1af0
 #1: ffff88801eeddd70 (&sb->s_type->i_mutex_key#6){++++}-{3:3}, at: vfs_fileattr_set+0x14c/0xb90
 #2: ffff88801eeddf10 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_change_inode_journal_flag+0x126/0x550
 #3: ffff888010768b90 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x17f/0x550

stack backtrace:
CPU: 1 PID: 4987 Comm: syz-executor.0 Not tainted 6.1.0-rc8-next-20221208 #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+0x187/0x550
 ext4_fileattr_set+0x14fb/0x19f0
 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: 0033:0x7efe0e012b19
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:00007efe0b567188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007efe0e126020 RCX: 00007efe0e012b19
RDX: 0000000020000040 RSI: 0000000040086602 RDI: 0000000000000005
RBP: 00007efe0e06cf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe40c09e3f R14: 00007efe0b567300 R15: 0000000000022000
 </TASK>
perf: interrupt took too long (2522 > 2500), lowering kernel.perf_event_max_sample_rate to 79000
perf: interrupt took too long (3170 > 3152), lowering kernel.perf_event_max_sample_rate to 63000
blktrace: Concurrent blktraces are not allowed on sg0
Bluetooth: hci4: command 0x0406 tx timeout
Bluetooth: hci2: command 0x0406 tx timeout
Bluetooth: hci3: command 0x0406 tx timeout
Bluetooth: hci0: command 0x0406 tx timeout
Bluetooth: hci6: command 0x0406 tx timeout