======================================================
WARNING: possible circular locking dependency detected
6.2.0-rc5-next-20230123 #1 Not tainted
------------------------------------------------------
syz-executor.6/18045 is trying to acquire lock:
ffff88800b508400 (&sb->s_type->i_mutex_key#6){++++}-{3:3}, at: ext4_bmap+0x52/0x470

but task is already holding lock:
ffff88800fe303f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_journal_flush+0x48f/0xc10

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&journal->j_checkpoint_mutex){+.+.}-{3:3}:
       mutex_lock_io_nested+0x14c/0x1300
       jbd2_journal_flush+0x19e/0xc10
       ext4_change_inode_journal_flag+0x39d/0x550
       ext4_fileattr_set+0x14fa/0x19f0
       vfs_fileattr_set+0x7a2/0xbd0
       do_vfs_ioctl+0xfc1/0x1610
       __x64_sys_ioctl+0x110/0x210
       do_syscall_64+0x3f/0x90
       entry_SYSCALL_64_after_hwframe+0x72/0xdc

-> #2 (&journal->j_barrier){+.+.}-{3:3}:
       __mutex_lock+0x136/0x14c0
       jbd2_journal_lock_updates+0x162/0x310
       ext4_change_inode_journal_flag+0x187/0x550
       ext4_fileattr_set+0x14fa/0x19f0
       vfs_fileattr_set+0x7a2/0xbd0
       do_vfs_ioctl+0xfc1/0x1610
       __x64_sys_ioctl+0x110/0x210
       do_syscall_64+0x3f/0x90
       entry_SYSCALL_64_after_hwframe+0x72/0xdc

-> #1 (&sbi->s_writepages_rwsem){++++}-{0:0}:
       percpu_down_write+0x51/0x350
       ext4_ind_migrate+0x23b/0x840
       ext4_fileattr_set+0x1521/0x19f0
       vfs_fileattr_set+0x7a2/0xbd0
       do_vfs_ioctl+0xfc1/0x1610
       __x64_sys_ioctl+0x110/0x210
       do_syscall_64+0x3f/0x90
       entry_SYSCALL_64_after_hwframe+0x72/0xdc

-> #0 (&sb->s_type->i_mutex_key#6){++++}-{3:3}:
       __lock_acquire+0x2a52/0x5e90
       lock_acquire.part.0+0x120/0x340
       down_read+0x9c/0x450
       ext4_bmap+0x52/0x470
       bmap+0xb0/0x130
       jbd2_journal_bmap+0xac/0x190
       jbd2_journal_flush+0x860/0xc10
       __ext4_ioctl+0x9fd/0x42a0
       __x64_sys_ioctl+0x19e/0x210
       do_syscall_64+0x3f/0x90
       entry_SYSCALL_64_after_hwframe+0x72/0xdc

other info that might help us debug this:

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

 Possible unsafe locking scenario:

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

 *** DEADLOCK ***

2 locks held by syz-executor.6/18045:
 #0: ffff88800fe30170 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x162/0x310
 #1: ffff88800fe303f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_journal_flush+0x48f/0xc10

stack backtrace:
CPU: 0 PID: 18045 Comm: syz-executor.6 Not tainted 6.2.0-rc5-next-20230123 #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+0x2a52/0x5e90
 lock_acquire.part.0+0x120/0x340
 down_read+0x9c/0x450
 ext4_bmap+0x52/0x470
 bmap+0xb0/0x130
 jbd2_journal_bmap+0xac/0x190
 jbd2_journal_flush+0x860/0xc10
 __ext4_ioctl+0x9fd/0x42a0
 __x64_sys_ioctl+0x19e/0x210
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7feb7dbd3b19
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:00007feb7b149188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007feb7dce6f60 RCX: 00007feb7dbd3b19
RDX: 0000000020000340 RSI: 000000004004662b RDI: 0000000000000006
RBP: 00007feb7dc2df6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffee993aedf R14: 00007feb7b149300 R15: 0000000000022000
 </TASK>
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 18062 Comm: syz-executor.1 Not tainted 6.2.0-rc5-next-20230123 #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
 should_fail_ex.cold+0x5/0xa
 should_failslab+0x9/0x20
 kmem_cache_alloc+0x5a/0x300
 __kernfs_new_node+0xd4/0x8c0
 kernfs_new_node+0x97/0x120
 __kernfs_create_file+0x55/0x350
 sysfs_add_file_mode_ns+0x21c/0x440
 sysfs_create_file_ns+0x12f/0x1d0
 driver_create_file+0x4c/0x70
 bus_add_driver+0x4bb/0x5c0
 driver_register+0x224/0x3a0
 usb_gadget_register_driver_owner+0xff/0x1e0
 raw_ioctl+0x194b/0x1f00
 __x64_sys_ioctl+0x19e/0x210
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f00fbe188d7
Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 a4 54 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 00 00 00 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:00007f00f938c0b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f00f938d130 RCX: 00007f00fbe188d7
RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000004
RBP: 0000000000000004 R08: 000000000000ffff R09: 000000000000000b
R10: 00007f00f938c180 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000020000000 R15: 0000000000000000
 </TASK>
loop0: detected capacity change from 0 to 129
bus_add_driver: add_bind_files(raw-gadget.0) failed
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
Bluetooth: hci5: unknown advertising packet type: 0x06
Bluetooth: hci5: unknown advertising packet type: 0x06
loop0: detected capacity change from 0 to 129
Bluetooth: hci5: ACL packet for unknown connection handle 200
Bluetooth: hci5: ACL packet for unknown connection handle 0
Bluetooth: hci5: ACL packet for unknown connection handle 200
Bluetooth: hci5: ACL packet for unknown connection handle 0
loop0: detected capacity change from 0 to 129
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
Bluetooth: hci5: ACL packet for unknown connection handle 200
Bluetooth: hci5: ACL packet for unknown connection handle 200
loop0: detected capacity change from 0 to 130
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 PID: 18135 Comm: syz-executor.1 Not tainted 6.2.0-rc5-next-20230123 #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
 should_fail_ex.cold+0x5/0xa
 should_failslab+0x9/0x20
 kmem_cache_alloc+0x5a/0x300
 __kernfs_new_node+0xd4/0x8c0
 kernfs_new_node+0x97/0x120
 __kernfs_create_file+0x55/0x350
 sysfs_add_file_mode_ns+0x21c/0x440
 sysfs_create_file_ns+0x12f/0x1d0
 driver_create_file+0x4c/0x70
 bus_add_driver+0x4bb/0x5c0
 driver_register+0x224/0x3a0
 usb_gadget_register_driver_owner+0xff/0x1e0
 raw_ioctl+0x194b/0x1f00
 __x64_sys_ioctl+0x19e/0x210
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f00fbe188d7
Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 a4 54 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 00 00 00 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:00007f00f938c0b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f00f938d130 RCX: 00007f00fbe188d7
RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000004
RBP: 0000000000000004 R08: 000000000000ffff R09: 000000000000000b
loop0: detected capacity change from 0 to 130
R10: 00007f00f938c180 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000020000000 R15: 0000000000000000
 </TASK>
Bluetooth: hci5: ACL packet for unknown connection handle 200
Bluetooth: hci5: ACL packet for unknown connection handle 200
bus_add_driver: add_bind_files(raw-gadget.0) failed
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
Bluetooth: hci5: ACL packet for unknown connection handle 200
Bluetooth: hci5: ACL packet for unknown connection handle 200
Bluetooth: hci5: ACL packet for unknown connection handle 200
Bluetooth: hci5: ACL packet for unknown connection handle 200
Bluetooth: hci5: ACL packet for unknown connection handle 200
Bluetooth: hci5: ACL packet for unknown connection handle 200
loop0: detected capacity change from 0 to 130
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
loop0: detected capacity change from 0 to 130
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 0 PID: 18221 Comm: syz-executor.1 Not tainted 6.2.0-rc5-next-20230123 #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
 should_fail_ex.cold+0x5/0xa
 should_failslab+0x9/0x20
 __kmem_cache_alloc_node+0x5b/0x2f0
 __kmalloc+0x46/0xc0
loop0: detected capacity change from 0 to 130
 kobject_get_path+0xc9/0x200
 kobject_uevent_env+0x260/0xfa0
 driver_register+0x2e3/0x3a0
 usb_gadget_register_driver_owner+0xff/0x1e0
 raw_ioctl+0x194b/0x1f00
 __x64_sys_ioctl+0x19e/0x210
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f00fbe188d7
Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 a4 54 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 00 00 00 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:00007f00f938c0b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f00f938d130 RCX: 00007f00fbe188d7
RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000004
RBP: 0000000000000004 R08: 000000000000ffff R09: 000000000000000b
R10: 00007f00f938c180 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000020000000 R15: 0000000000000000
 </TASK>
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
loop0: detected capacity change from 0 to 131
loop0: detected capacity change from 0 to 131
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
loop0: detected capacity change from 0 to 131
loop0: detected capacity change from 0 to 131
FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 1 PID: 18295 Comm: syz-executor.1 Not tainted 6.2.0-rc5-next-20230123 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 <TASK>
loop0: detected capacity change from 0 to 131
 dump_stack_lvl+0x8f/0xb7
 should_fail_ex.cold+0x5/0xa
 should_failslab+0x9/0x20
 kmem_cache_alloc_node+0x5d/0x310
 __alloc_skb+0x21a/0x310
 alloc_uevent_skb+0x7b/0x210
 kobject_uevent_env+0xaa1/0xfa0
 driver_register+0x2e3/0x3a0
 usb_gadget_register_driver_owner+0xff/0x1e0
 raw_ioctl+0x194b/0x1f00
 __x64_sys_ioctl+0x19e/0x210
 do_syscall_64+0x3f/0x90
 entry_SYSCALL_64_after_hwframe+0x72/0xdc
RIP: 0033:0x7f00fbe188d7
Code: 3c 1c 48 f7 d8 49 39 c4 72 b8 e8 a4 54 02 00 85 c0 78 bd 48 83 c4 08 4c 89 e0 5b 41 5c c3 0f 1f 44 00 00 b8 10 00 00 00 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:00007f00f938c0b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f00f938d130 RCX: 00007f00fbe188d7
RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000004
RBP: 0000000000000004 R08: 000000000000ffff R09: 000000000000000b
R10: 00007f00f938c180 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000020000000 R15: 0000000000000000
 </TASK>
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
loop0: detected capacity change from 0 to 131
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.6'.
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.6'.
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.6'.
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
9pnet_virtio: no channels available for device ./file0
misc raw-gadget: fail, usb_gadget_register_driver returned -16
9pnet_fd: Insufficient options for proto=fd
9pnet_virtio: no channels available for device ./file0
9pnet_fd: Insufficient options for proto=fd
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.6'.
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.6'.
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'.
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.2'.
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16
UDC core: USB Raw Gadget: couldn't find an available UDC or it's busy
misc raw-gadget: fail, usb_gadget_register_driver returned -16