======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.9.1513/14661 is trying to acquire lock:
ffff888112e6ec78 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_init_acl+0x2f9/0x720

but task is already holding lock:
ffff888106810950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f87/0x21c0

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (jbd2_handle){++++}-{0:0}:
       lock_acquire+0x120/0x360
       jbd2_journal_lock_updates+0xaa/0x360
       __ocfs2_flush_truncate_log+0x2ba/0x10e0
       ocfs2_flush_truncate_log+0x4f/0x70
       ocfs2_sync_fs+0x116/0x310
       sync_filesystem+0x1cf/0x230
       generic_shutdown_super+0x6f/0x2c0
       kill_block_super+0x44/0x90
       deactivate_locked_super+0xbc/0x130
       cleanup_mnt+0x425/0x4c0
       task_work_run+0x1d4/0x260
       do_exit+0x6b5/0x2300
       do_group_exit+0x21c/0x2d0
       get_signal+0x1285/0x1340
       arch_do_signal_or_restart+0xa0/0x790
       exit_to_user_mode_loop+0x72/0x130
       do_syscall_64+0x2bd/0xfa0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}:
       lock_acquire+0x120/0x360
       down_write+0x96/0x1f0
       ocfs2_try_to_free_truncate_log+0xaf/0x360
       ocfs2_write_begin_nolock+0x3143/0x4340
       ocfs2_page_mkwrite+0x600/0xc40
       do_page_mkwrite+0x14d/0x310
       __handle_mm_fault+0x1916/0x5400
       handle_mm_fault+0x40a/0x8e0
       do_user_addr_fault+0x764/0x1380
       exc_page_fault+0x82/0x100
       asm_exc_page_fault+0x26/0x30
       rep_movs_alternative+0x75/0x90
       _copy_to_user+0x8a/0xb0
       vcs_read+0xa62/0xdb0
       vfs_read+0x200/0xa30
       ksys_read+0x145/0x250
       do_syscall_64+0xfa/0xfa0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&ocfs2_file_ip_alloc_sem_key){++++}-{4:4}:
       lock_acquire+0x120/0x360
       down_write+0x96/0x1f0
       ocfs2_try_remove_refcount_tree+0xb6/0x320
       ocfs2_truncate_file+0xda0/0x1420
       ocfs2_setattr+0x1520/0x1b40
       notify_change+0xc1a/0xf40
       do_truncate+0x1a4/0x220
       coredump_file+0x7cb/0xaf0
       vfs_coredump+0x1693/0x2a60
       get_signal+0x1108/0x1340
       arch_do_signal_or_restart+0xa0/0x790
       irqentry_exit_to_user_mode+0x7e/0x110
       exc_page_fault+0xab/0x100
       asm_exc_page_fault+0x26/0x30

-> #0 (&oi->ip_xattr_sem){++++}-{4:4}:
       validate_chain+0xb9b/0x2140
       __lock_acquire+0xab9/0xd20
       lock_acquire+0x120/0x360
       down_read+0x46/0x2e0
       ocfs2_init_acl+0x2f9/0x720
       ocfs2_mknod+0x1321/0x2050
       ocfs2_create+0x1a5/0x440
       path_openat+0x14f4/0x3830
       do_filp_open+0x1fa/0x410
       do_sys_openat2+0x121/0x1c0
       __x64_sys_openat+0x138/0x170
       do_syscall_64+0xfa/0xfa0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  &oi->ip_xattr_sem --> &ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE] --> jbd2_handle

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  rlock(jbd2_handle);
                               lock(&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]);
                               lock(jbd2_handle);
  rlock(&oi->ip_xattr_sem);

 *** DEADLOCK ***

8 locks held by syz.9.1513/14661:
 #0: ffff88812e344420 (sb_writers#19){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff888112e6ef40 (&type->i_mutex_dir_key#14){++++}-{4:4}, at: path_openat+0x8da/0x3830
 #2: ffff88811c9c26c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640
 #3: ffff888112e69840 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640
 #4: ffff888112e6a6c0 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640
 #5: ffff88812e344610 (sb_internal#4){.+.+}-{0:0}, at: ocfs2_mknod+0xe93/0x2050
 #6: ffff888025be10e8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x36a/0x6d0
 #7: ffff888106810950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f87/0x21c0

stack backtrace:
CPU: 0 UID: 0 PID: 14661 Comm: syz.9.1513 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 print_circular_bug+0x2ee/0x310
 check_noncircular+0x134/0x160
 validate_chain+0xb9b/0x2140
 __lock_acquire+0xab9/0xd20
 lock_acquire+0x120/0x360
 down_read+0x46/0x2e0
 ocfs2_init_acl+0x2f9/0x720
 ocfs2_mknod+0x1321/0x2050
 ocfs2_create+0x1a5/0x440
 path_openat+0x14f4/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0xfa0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f06bbf8ec29
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f06bce6c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f06bc1d5fa0 RCX: 00007f06bbf8ec29
RDX: 0000000000000042 RSI: 0000200000000040 RDI: ffffffffffffff9c
RBP: 00007f06bc011e41 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000000c R11: 0000000000000246 R12: 0000000000000000
R13: 00007f06bc1d6038 R14: 00007f06bc1d5fa0 R15: 00007fffcb076828
 </TASK>
pim6reg: entered allmulticast mode
pim6reg: left allmulticast mode
