ocfs2: Mounting device (7,9) 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 Not tainted
------------------------------------------------------
syz.9.1039/14795 is trying to acquire lock:
ffff888120b309a0 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}, at: ocfs2_xattr_set+0xba7/0x13e0

but task is already holding lock:
ffff888117edbee8 (&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:

-> #3 (&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

-> #2 (&journal->j_trans_barrier){.+.+}-{4:4}:
       down_read+0x47/0x2e0
       ocfs2_start_trans+0x3ab/0x700
       ocfs2_mknod+0x1181/0x2260
       ocfs2_mkdir+0x181/0x460
       vfs_mkdir+0x413/0x630
       filename_mkdirat+0x285/0x510
       __se_sys_mkdirat+0x35/0x150
       do_syscall_64+0x15f/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (sb_internal#6){.+.+}-{0:0}:
       ocfs2_start_trans+0x2ac/0x700
       ocfs2_remove_btree_range+0x84c/0x1610
       ocfs2_remove_inode_range+0x100b/0x2770
       __ocfs2_change_file_space+0x85d/0xf10
       ocfs2_fallocate+0x1f5/0x240
       vfs_fallocate+0x669/0x7e0
       file_ioctl+0x63f/0x860
       do_vfs_ioctl+0xc26/0x1530
       __se_sys_ioctl+0x82/0x170
       do_syscall_64+0x15f/0xf80
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #0 (&ocfs2_sysfile_lock_key[TRUNCATE_LOG_SYSTEM_INODE]){+.+.}-{4:4}:
       __lock_acquire+0x15a5/0x2cf0
       lock_acquire+0x106/0x350
       down_write+0x96/0x200
       ocfs2_xattr_set+0xba7/0x13e0
       __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[TRUNCATE_LOG_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[TRUNCATE_LOG_SYSTEM_INODE]);

 *** DEADLOCK ***

4 locks held by syz.9.1039/14795:
 #0: ffff88801b5180d8 (&type->s_umount_key#74/1){+.+.}-{4:4}, at: alloc_super+0x28c/0xab0
 #1: ffff88810e4a8410 (sb_writers#20){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #2: ffff888117edc1a0 (&sb->s_type->i_mutex_key#33){++++}-{4:4}, at: vfs_setxattr+0x13e/0x360
 #3: ffff888117edbee8 (&oi->ip_xattr_sem){++++}-{4:4}, at: ocfs2_xattr_set+0x475/0x13e0

stack backtrace:
CPU: 0 UID: 0 PID: 14795 Comm: syz.9.1039 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+0xe8/0x150
 print_circular_bug+0x2e1/0x300
 check_noncircular+0x12e/0x150
 __lock_acquire+0x15a5/0x2cf0
 lock_acquire+0x106/0x350
 down_write+0x96/0x200
 ocfs2_xattr_set+0xba7/0x13e0
 __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: 0033:0x7f3315d9cdd9
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:00007f3316b91028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f3316015fa0 RCX: 00007f3315d9cdd9
RDX: 0000200000000b80 RSI: 0000200000000580 RDI: 0000000000000000
RBP: 00007f3315e32d69 R08: 0000200000000480 R09: 0000000000000000
R10: 0000000002010009 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3316016038 R14: 00007f3316015fa0 R15: 00007fff1ba56d98
 </TASK>
overlayfs: upper fs missing required features.
