ocfs2: Mounting device (7,7) on (node local, slot 0) with ordered data mode.
overlayfs: upper fs does not support tmpfile.
overlayfs: upper fs does not support RENAME_WHITEOUT.
======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Tainted: G             L     
------------------------------------------------------
syz.7.4236/22160 is trying to acquire lock:
ffff8881167a89a0 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x16d/0x4840

but task is already holding lock:
ffff88811656e8e8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x475/0x13e0

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #4 (&oi->ip_xattr_sem){++++}-{4:4}:
       down_read+0x47/0x2e0
       ocfs2_init_acl+0x2fd/0x7e0
       ocfs2_mknod+0x1679/0x2260
       ocfs2_create+0x195/0x460
       path_openat+0x1395/0x3860
       do_file_open+0x23e/0x4a0
       do_sys_openat2+0x113/0x200
       __x64_sys_openat+0x138/0x170
       do_syscall_64+0x15f/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #3 (&journal->j_trans_barrier){.+.+}-{4:4}:
       down_read+0x47/0x2e0
       ocfs2_start_trans+0x3ab/0x700
       ocfs2_shutdown_local_alloc+0x1f5/0xa40
       ocfs2_dismount_volume+0x1ec/0x8d0
       generic_shutdown_super+0x13d/0x2d0
       kill_block_super+0x44/0x90
       deactivate_locked_super+0xbc/0x130
       cleanup_mnt+0x437/0x4d0
       task_work_run+0x1d9/0x270
       exit_to_user_mode_loop+0xed/0x480
       do_syscall_64+0x33e/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #2 (sb_internal#2){.+.+}-{0:0}:
       ocfs2_start_trans+0x2ac/0x700
       ocfs2_mknod+0x1181/0x2260
       ocfs2_create+0x195/0x460
       path_openat+0x1395/0x3860
       do_file_open+0x23e/0x4a0
       do_sys_openat2+0x113/0x200
       __x64_sys_openat+0x138/0x170
       do_syscall_64+0x15f/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (&ocfs2_sysfile_lock_key[LOCAL_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:
       down_write+0x96/0x200
       ocfs2_reserve_local_alloc_bits+0x11f/0x2660
       ocfs2_reserve_clusters_with_limit+0x1b9/0xc20
       ocfs2_mknod+0x111f/0x2260
       ocfs2_create+0x195/0x460
       path_openat+0x1395/0x3860
       do_file_open+0x23e/0x4a0
       do_sys_openat2+0x113/0x200
       __x64_sys_openat+0x138/0x170
       do_syscall_64+0x15f/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]){+.+.}-{4:4}:
       __lock_acquire+0x15a5/0x2cf0
       lock_acquire+0x106/0x350
       down_write+0x96/0x200
       ocfs2_reserve_suballoc_bits+0x16d/0x4840
       ocfs2_reserve_new_metadata_blocks+0x415/0x9a0
       ocfs2_init_xattr_set_ctxt+0x2f5/0x760
       ocfs2_xattr_set+0xc42/0x13e0
       __vfs_setxattr+0x43c/0x480
       __vfs_setxattr_noperm+0x12d/0x660
       vfs_setxattr+0x163/0x360
       ovl_fill_super+0x4b5e/0x5e20
       get_tree_nodev+0xbb/0x150
       vfs_get_tree+0x92/0x2a0
       do_new_mount+0x341/0xd30
       __se_sys_mount+0x31d/0x420
       do_syscall_64+0x15f/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  &ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE] --> &journal->j_trans_barrier --> &oi->ip_xattr_sem

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&oi->ip_xattr_sem);
                               lock(&journal->j_trans_barrier);
                               lock(&oi->ip_xattr_sem);
  lock(&ocfs2_sysfile_lock_key[EXTENT_ALLOC_SYSTEM_INODE]);

 *** DEADLOCK ***

4 locks held by syz.7.4236/22160:
 #0: ffff8881097360d8 (&type->s_umount_key#78/1){+.+.}-{4:4}, at: alloc_super+0x28c/0xab0
 #1: ffff888115088410 (sb_writers#29){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #2: ffff88811656eba0 (&sb->s_type->i_mutex_key#38){++++}-{4:4}, at: vfs_setxattr+0x13e/0x360
 #3: ffff88811656e8e8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x475/0x13e0

stack backtrace:
CPU: 0 UID: 0 PID: 22160 Comm: syz.7.4236 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
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+0xe8/0x150
 print_circular_bug+0x2e1/0x300
 check_noncircular+0x12e/0x150
 __lock_acquire+0x15a5/0x2cf0
 lock_acquire+0x106/0x350
 down_write+0x96/0x200
 ocfs2_reserve_suballoc_bits+0x16d/0x4840
 ocfs2_reserve_new_metadata_blocks+0x415/0x9a0
 ocfs2_init_xattr_set_ctxt+0x2f5/0x760
 ocfs2_xattr_set+0xc42/0x13e0
 __vfs_setxattr+0x43c/0x480
 __vfs_setxattr_noperm+0x12d/0x660
 vfs_setxattr+0x163/0x360
 ovl_fill_super+0x4b5e/0x5e20
 get_tree_nodev+0xbb/0x150
 vfs_get_tree+0x92/0x2a0
 do_new_mount+0x341/0xd30
 __se_sys_mount+0x31d/0x420
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efd1fd9cdd9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007efd20ce7028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007efd20015fa0 RCX: 00007efd1fd9cdd9
RDX: 0000200000000000 RSI: 0000200000000340 RDI: 0000000000000000
RBP: 00007efd1fe32d69 R08: 00002000000000c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007efd20016038 R14: 00007efd20015fa0 R15: 00007ffe0c977e08
 </TASK>
OCFS2: ERROR (device loop7): int ocfs2_validate_gd_self(struct super_block *, struct buffer_head *, int): Group descriptor #20 has bad signature 
On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted.
OCFS2: File system is now read-only.
(syz.7.4236,22160,0):ocfs2_search_chain:1913 ERROR: status = -30
(syz.7.4236,22160,0):ocfs2_search_chain:2036 ERROR: status = -30
(syz.7.4236,22160,0):ocfs2_claim_suballoc_bits:2123 ERROR: status = -30
(syz.7.4236,22160,0):ocfs2_claim_suballoc_bits:2176 ERROR: status = -30
(syz.7.4236,22160,0):ocfs2_claim_metadata:2201 ERROR: status = -30
(syz.7.4236,22160,0):ocfs2_claim_metadata:2214 ERROR: status = -30
(syz.7.4236,22160,0):ocfs2_create_xattr_block:2918 ERROR: status = -30
(syz.7.4236,22160,0):ocfs2_xattr_block_set:2999 ERROR: status = -30
overlayfs: failed to set xattr on upper
overlayfs: ...falling back to redirect_dir=nofollow.
overlayfs: ...falling back to index=off.
overlayfs: ...falling back to uuid=null.
overlayfs: upper fs missing required features.
