======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.1.130/6754 is trying to acquire lock:
ffff88811b0f86f8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_init_acl+0x2f9/0x720

but task is already holding lock:
ffff888123288950 (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
       start_this_handle+0x1fa7/0x21c0
       jbd2__journal_start+0x2c1/0x5b0
       jbd2_journal_start+0x2a/0x40
       ocfs2_start_trans+0x376/0x6d0
       ocfs2_mknod+0xe93/0x2050
       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/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
       lock_acquire+0x120/0x360
       down_read+0x46/0x2e0
       ocfs2_start_trans+0x36a/0x6d0
       ocfs2_mknod+0xe93/0x2050
       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/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (sb_internal#3){.+.+}-{0:0}:
       lock_acquire+0x120/0x360
       ocfs2_start_trans+0x26b/0x6d0
       ocfs2_xattr_set+0xd69/0x11f0
       __vfs_removexattr+0x431/0x470
       __vfs_removexattr_locked+0x1ed/0x230
       vfs_removexattr+0x80/0x1b0
       ovl_get_workdir+0xd0f/0x17c0
       ovl_fill_super+0x1365/0x35b0
       get_tree_nodev+0xbb/0x150
       vfs_get_tree+0x92/0x2b0
       do_new_mount+0x2a2/0x9e0
       __se_sys_mount+0x317/0x410
       do_syscall_64+0xfa/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #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/0x3b0
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  &oi->ip_xattr_sem --> &journal->j_trans_barrier --> jbd2_handle

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  rlock(jbd2_handle);
                               lock(&journal->j_trans_barrier);
                               lock(jbd2_handle);
  rlock(&oi->ip_xattr_sem);

 *** DEADLOCK ***

8 locks held by syz.1.130/6754:
 #0: ffff8880303b2428 (sb_writers#17){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff88811b0f89c0 (&type->i_mutex_dir_key#13){++++}-{4:4}, at: path_openat+0x8da/0x3830
 #2: ffff88811b1009c0 (&ocfs2_sysfile_lock_key[INODE_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640
 #3: ffff88811b0fef40 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640
 #4: ffff88811b0fd240 (&ocfs2_sysfile_lock_key[GLOBAL_BITMAP_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640
 #5: ffff8880303b2618 (sb_internal#3){.+.+}-{0:0}, at: ocfs2_mknod+0xe93/0x2050
 #6: ffff88811e06d8e8 (&journal->j_trans_barrier){.+.+}-{4:4}, at: ocfs2_start_trans+0x36a/0x6d0
 #7: ffff888123288950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x1f87/0x21c0

stack backtrace:
CPU: 1 UID: 0 PID: 6754 Comm: syz.1.130 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/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe48ad8ebe9
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:00007fe48bc2d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fe48afc5fa0 RCX: 00007fe48ad8ebe9
RDX: 0000000000101042 RSI: 0000200000000180 RDI: ffffffffffffff9c
RBP: 00007fe48ae11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000001b6 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe48afc6038 R14: 00007fe48afc5fa0 R15: 00007ffd9479df78
 </TASK>
OCFS2: ERROR (device loop1): int ocfs2_validate_gd_self(struct super_block *, struct buffer_head *, int): Group descriptor #32 has an invalid bg_blkno of 0
On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted.
OCFS2: File system is now read-only.
(syz.1.130,6754,1):ocfs2_search_chain:1817 ERROR: status = -30
(syz.1.130,6754,1):ocfs2_search_chain:1940 ERROR: status = -30
(syz.1.130,6754,1):ocfs2_claim_suballoc_bits:2010 ERROR: status = -30
(syz.1.130,6754,1):ocfs2_claim_suballoc_bits:2063 ERROR: status = -30
(syz.1.130,6754,1):__ocfs2_claim_clusters:2438 ERROR: status = -30
(syz.1.130,6754,1):__ocfs2_claim_clusters:2446 ERROR: status = -30
(syz.1.130,6754,1):ocfs2_add_clusters_in_btree:4838 ERROR: status = -30
(syz.1.130,6754,1):ocfs2_extend_allocation:642 ERROR: status = -30
(syz.1.130,6754,1):ocfs2_allocate_unwritten_extents:1499 ERROR: status = -30
(syz.1.130,6754,1):__ocfs2_change_file_space:2045 ERROR: status = -30
ocfs2: Unmounting device (7,1) on (node local)
