overlayfs: fs on './file0' does not support file handles, falling back to index=off.
======================================================
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
WARNING: possible circular locking dependency detected
4.14.307-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.1/10256 is trying to acquire lock:
 (&ovl_i_mutex_dir_key[depth]){++++}, at: [<ffffffff818b2877>] iterate_dir+0x387/0x5e0 fs/readdir.c:43

but task is already holding lock:
 (sb_writers#6){.+.+}, at: [<ffffffff818e203a>] sb_start_write include/linux/fs.h:1551 [inline]
 (sb_writers#6){.+.+}, at: [<ffffffff818e203a>] mnt_want_write+0x3a/0xb0 fs/namespace.c:386
overlayfs: fs on './file0' does not support file handles, falling back to index=off.

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (sb_writers#6){.+.+}:
       percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline]
       percpu_down_read include/linux/percpu-rwsem.h:59 [inline]
       __sb_start_write+0x64/0x260 fs/super.c:1342
       sb_start_write include/linux/fs.h:1551 [inline]
       mnt_want_write+0x3a/0xb0 fs/namespace.c:386
       ovl_xattr_set+0x4d/0x290 fs/overlayfs/inode.c:214
       ovl_posix_acl_xattr_set+0x2b7/0x830 fs/overlayfs/super.c:762
       __vfs_setxattr+0xdc/0x130 fs/xattr.c:150
       __vfs_setxattr_noperm+0xfd/0x3d0 fs/xattr.c:181
       __vfs_setxattr_locked+0x14d/0x250 fs/xattr.c:239
       vfs_setxattr+0xcf/0x230 fs/xattr.c:256
       setxattr+0x1a9/0x300 fs/xattr.c:523
       path_setxattr+0x118/0x130 fs/xattr.c:542
       SYSC_lsetxattr fs/xattr.c:564 [inline]
       SyS_lsetxattr+0x33/0x40 fs/xattr.c:560
       do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
       entry_SYSCALL_64_after_hwframe+0x5e/0xd3

-> #0 (&ovl_i_mutex_dir_key[depth]){++++}:
       lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
       down_write_killable+0x37/0xb0 kernel/locking/rwsem.c:68
       iterate_dir+0x387/0x5e0 fs/readdir.c:43
       ovl_dir_read fs/overlayfs/readdir.c:306 [inline]
       ovl_dir_read_merged+0x2c5/0x430 fs/overlayfs/readdir.c:365
       ovl_check_empty_dir+0x6e/0x200 fs/overlayfs/readdir.c:870
       ovl_check_empty_and_clear+0x72/0xe0 fs/overlayfs/dir.c:306
       ovl_rename+0x57d/0xe50 fs/overlayfs/dir.c:959
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
       vfs_rename+0x560/0x1820 fs/namei.c:4498
       SYSC_renameat2 fs/namei.c:4646 [inline]
       SyS_renameat2+0x95b/0xad0 fs/namei.c:4535
       do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
       entry_SYSCALL_64_after_hwframe+0x5e/0xd3
overlayfs: fs on './file0' does not support file handles, falling back to index=off.

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(sb_writers#6);
                               lock(&ovl_i_mutex_dir_key[depth]
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
);
                               lock(sb_writers#6);
  lock(&ovl_i_mutex_dir_key[depth]);

 *** DEADLOCK ***

6 locks held by syz-executor.1/10256:
 #0: 
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
 (sb_writers#13){.+.+}, at: [<ffffffff818e203a>] sb_start_write include/linux/fs.h:1551 [inline]
 (sb_writers#13){.+.+}, at: [<ffffffff818e203a>] mnt_want_write+0x3a/0xb0 fs/namespace.c:386
 #1:  (&type->s_vfs_rename_key#3){+.+.}, at: [<ffffffff81893544>] lock_rename+0x54/0x280 fs/namei.c:2889
 #2:  (&ovl_i_mutex_dir_key[depth]#2/1){+.+.}, at: [<ffffffff81893622>] inode_lock_nested include/linux/fs.h:754 [inline]
 #2:  (&ovl_i_mutex_dir_key[depth]#2/1){+.+.}, at: [<ffffffff81893622>] lock_rename+0x132/0x280 fs/namei.c:2900
 #3:  (&ovl_i_mutex_dir_key[depth]#2/2){+.+.}, at: [<ffffffff81893656>] inode_lock_nested include/linux/fs.h:754 [inline]
 #3:  (&ovl_i_mutex_dir_key[depth]#2/2){+.+.}, at: [<ffffffff81893656>] lock_rename+0x166/0x280 fs/namei.c:2901
 #4:  (&ovl_i_mutex_dir_key[depth]#2){++++}, at: [<ffffffff818a71a8>] inode_lock include/linux/fs.h:719 [inline]
 #4:  (&ovl_i_mutex_dir_key[depth]#2){++++}, at: [<ffffffff818a71a8>] vfs_rename+0xbd8/0x1820 fs/namei.c:4472
 #5:  (sb_writers#6){.+.+}, at: [<ffffffff818e203a>] sb_start_write include/linux/fs.h:1551 [inline]
 #5:  (sb_writers#6){.+.+}, at: [<ffffffff818e203a>] mnt_want_write+0x3a/0xb0 fs/namespace.c:386

stack backtrace:
CPU: 0 PID: 10256 Comm: syz-executor.1 Not tainted 4.14.307-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258
 check_prev_add kernel/locking/lockdep.c:1905 [inline]
 check_prevs_add kernel/locking/lockdep.c:2022 [inline]
 validate_chain kernel/locking/lockdep.c:2464 [inline]
 __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491
 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
 down_write_killable+0x37/0xb0 kernel/locking/rwsem.c:68
 iterate_dir+0x387/0x5e0 fs/readdir.c:43
 ovl_dir_read fs/overlayfs/readdir.c:306 [inline]
 ovl_dir_read_merged+0x2c5/0x430 fs/overlayfs/readdir.c:365
 ovl_check_empty_dir+0x6e/0x200 fs/overlayfs/readdir.c:870
 ovl_check_empty_and_clear+0x72/0xe0 fs/overlayfs/dir.c:306
 ovl_rename+0x57d/0xe50 fs/overlayfs/dir.c:959
 vfs_rename+0x560/0x1820 fs/namei.c:4498
 SYSC_renameat2 fs/namei.c:4646 [inline]
 SyS_renameat2+0x95b/0xad0 fs/namei.c:4535
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7fb9e98960f9
RSP: 002b:00007fb9e7e08168 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007fb9e99b5f80 RCX: 00007fb9e98960f9
RDX: 0000000000000000 RSI: 0000000020000440 RDI: 0000000020000100
RBP: 00007fb9e98f1ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe28f9cfff R14: 00007fb9e7e08300 R15: 0000000000022000
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
autofs4:pid:10338:check_dev_ioctl_version: ioctl control interface version mismatch: kernel(1.1), user(3674597890.509255727), cmd(0xc0189371)
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
autofs4:pid:10338:validate_dev_ioctl: invalid device control module version supplied for cmd(0xc0189371)
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
audit: type=1800 audit(1677902089.527:6): pid=10790 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="file0" dev="sda1" ino=14004 res=0
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.
overlayfs: fs on 'file0' does not support file handles, falling back to index=off.
overlayfs: fs on './file0' does not support file handles, falling back to index=off.