F2FS-fs (loop4): invalid crc value
F2FS-fs (loop4): Found nat_bits in checkpoint
F2FS-fs (loop4): Try to recover 1th superblock, ret: 0
F2FS-fs (loop4): Mounted with checkpoint version = 753bd00b
======================================================
WARNING: possible circular locking dependency detected
6.2.0-rc4-syzkaller-00379-gf883675bf652 #0 Not tainted
------------------------------------------------------
syz-executor.4/27527 is trying to acquire lock:
ffff88802aa72d18 (&mm->mmap_lock){++++}-{3:3}, at: __might_fault+0x8f/0x110 mm/memory.c:5646

but task is already holding lock:
ffff888079808088 (&sbi->sb_lock){++++}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2213 [inline]
ffff888079808088 (&sbi->sb_lock){++++}-{3:3}, at: f2fs_ioc_get_encryption_pwsalt fs/f2fs/file.c:2350 [inline]
ffff888079808088 (&sbi->sb_lock){++++}-{3:3}, at: __f2fs_ioctl+0x3572/0xb540 fs/f2fs/file.c:4169

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #3 (&sbi->sb_lock){++++}-{3:3}:
       lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668
       down_write+0x9c/0x270 kernel/locking/rwsem.c:1562
       f2fs_down_write fs/f2fs/f2fs.h:2213 [inline]
       f2fs_handle_error+0xe0/0x230 fs/f2fs/super.c:3926
       f2fs_check_nid_range fs/f2fs/node.c:39 [inline]
       __get_node_page+0xd9a/0x1570 fs/f2fs/node.c:1415
       read_xattr_block fs/f2fs/xattr.c:305 [inline]
       lookup_all_xattrs fs/f2fs/xattr.c:354 [inline]
       f2fs_getxattr+0x743/0x1490 fs/f2fs/xattr.c:531
       __f2fs_get_acl+0x52/0x900 fs/f2fs/acl.c:179
       f2fs_acl_create fs/f2fs/acl.c:377 [inline]
       f2fs_init_acl+0xd2/0x9b0 fs/f2fs/acl.c:420
       f2fs_init_inode_metadata+0x99a/0xf80 fs/f2fs/dir.c:591
       f2fs_add_regular_entry+0x8ce/0xea0 fs/f2fs/dir.c:775
       f2fs_add_dentry fs/f2fs/dir.c:816 [inline]
       f2fs_do_add_link+0x2a7/0x470 fs/f2fs/dir.c:855
       f2fs_add_link fs/f2fs/f2fs.h:3564 [inline]
       f2fs_mkdir+0x2ec/0x520 fs/f2fs/namei.c:767
       vfs_mkdir+0x3b3/0x590 fs/namei.c:4036
       do_mkdirat+0x25b/0x530 fs/namei.c:4061
       __do_sys_mkdir fs/namei.c:4081 [inline]
       __se_sys_mkdir fs/namei.c:4079 [inline]
       __x64_sys_mkdir+0x6a/0x80 fs/namei.c:4079
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x63/0xcd

-> #2 (&fi->i_xattr_sem){++++}-{3:3}:
       lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668
       down_write+0x9c/0x270 kernel/locking/rwsem.c:1562
       f2fs_down_write fs/f2fs/f2fs.h:2213 [inline]
       f2fs_setxattr+0x1d6/0x320 fs/f2fs/xattr.c:797
       __f2fs_set_acl+0xa58/0xdd0 fs/f2fs/acl.c:269
       set_posix_acl fs/posix_acl.c:957 [inline]
       vfs_remove_acl+0x586/0x800 fs/posix_acl.c:1209
       ovl_do_remove_acl fs/overlayfs/overlayfs.h:292 [inline]
       ovl_workdir_create+0x4df/0x8f0 fs/overlayfs/super.c:821
       ovl_make_workdir+0x107/0xdf0 fs/overlayfs/super.c:1294
       ovl_get_workdir+0x2e4/0x410 fs/overlayfs/super.c:1444
       ovl_fill_super+0x19d7/0x2790 fs/overlayfs/super.c:2000
       mount_nodev+0x52/0xe0 fs/super.c:1405
       legacy_get_tree+0xea/0x180 fs/fs_context.c:610
       vfs_get_tree+0x88/0x270 fs/super.c:1489
       do_new_mount+0x289/0xad0 fs/namespace.c:3145
       do_mount fs/namespace.c:3488 [inline]
       __do_sys_mount fs/namespace.c:3697 [inline]
       __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3674
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x63/0xcd

-> #1 (&sbi->cp_rwsem){++++}-{3:3}:
       lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668
       down_read+0x39/0x50 kernel/locking/rwsem.c:1509
       f2fs_down_read fs/f2fs/f2fs.h:2188 [inline]
       f2fs_lock_op fs/f2fs/f2fs.h:2231 [inline]
       f2fs_convert_inline_inode+0x55f/0x820 fs/f2fs/inline.c:219
       f2fs_vm_page_mkwrite+0x2d8/0x1350 fs/f2fs/file.c:79
       do_page_mkwrite+0x19e/0x5e0 mm/memory.c:2947
       do_shared_fault mm/memory.c:4579 [inline]
       do_fault mm/memory.c:4647 [inline]
       handle_pte_fault mm/memory.c:4931 [inline]
       __handle_mm_fault mm/memory.c:5073 [inline]
       handle_mm_fault+0x1952/0x26b0 mm/memory.c:5219
       do_user_addr_fault+0x69b/0xcb0 arch/x86/mm/fault.c:1428
       handle_page_fault arch/x86/mm/fault.c:1519 [inline]
       exc_page_fault+0x7a/0x110 arch/x86/mm/fault.c:1575
       asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
       copy_user_short_string+0x24/0x40 arch/x86/lib/copy_user_64.S:242
       copy_user_generic arch/x86/include/asm/uaccess_64.h:37 [inline]
       raw_copy_to_user arch/x86/include/asm/uaccess_64.h:58 [inline]
       copyout lib/iov_iter.c:170 [inline]
       _copy_to_iter+0x2e1/0x1020 lib/iov_iter.c:529
       copy_page_to_iter+0xf0/0x250 lib/iov_iter.c:727
       copy_folio_to_iter include/linux/uio.h:172 [inline]
       filemap_read+0x790/0xea0 mm/filemap.c:2745
       f2fs_file_read_iter+0x139/0xc00 fs/f2fs/file.c:4374
       call_read_iter include/linux/fs.h:2183 [inline]
       new_sync_read fs/read_write.c:389 [inline]
       vfs_read+0x7ac/0xbf0 fs/read_write.c:470
       ksys_read+0x177/0x2a0 fs/read_write.c:613
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x63/0xcd

-> #0 (&mm->mmap_lock){++++}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3097 [inline]
       check_prevs_add kernel/locking/lockdep.c:3216 [inline]
       validate_chain+0x1898/0x6ae0 kernel/locking/lockdep.c:3831
       __lock_acquire+0x1292/0x1f60 kernel/locking/lockdep.c:5055
       lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668
       __might_fault+0xb2/0x110 mm/memory.c:5647
       _copy_to_user+0x26/0x130 lib/usercopy.c:29
       copy_to_user include/linux/uaccess.h:169 [inline]
       f2fs_ioc_get_encryption_pwsalt fs/f2fs/file.c:2365 [inline]
       __f2fs_ioctl+0xaf72/0xb540 fs/f2fs/file.c:4169
       vfs_ioctl fs/ioctl.c:51 [inline]
       __do_sys_ioctl fs/ioctl.c:870 [inline]
       __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x63/0xcd

other info that might help us debug this:

Chain exists of:
  &mm->mmap_lock --> &fi->i_xattr_sem --> &sbi->sb_lock

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&sbi->sb_lock);
                               lock(&fi->i_xattr_sem);
                               lock(&sbi->sb_lock);
  lock(&mm->mmap_lock);

 *** DEADLOCK ***

2 locks held by syz-executor.4/27527:
 #0: ffff88805d290460 (sb_writers#15){.+.+}-{0:0}, at: mnt_want_write_file+0x5a/0x1f0 fs/namespace.c:552
 #1: ffff888079808088 (&sbi->sb_lock){++++}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2213 [inline]
 #1: ffff888079808088 (&sbi->sb_lock){++++}-{3:3}, at: f2fs_ioc_get_encryption_pwsalt fs/f2fs/file.c:2350 [inline]
 #1: ffff888079808088 (&sbi->sb_lock){++++}-{3:3}, at: __f2fs_ioctl+0x3572/0xb540 fs/f2fs/file.c:4169

stack backtrace:
CPU: 0 PID: 27527 Comm: syz-executor.4 Not tainted 6.2.0-rc4-syzkaller-00379-gf883675bf652 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106
 check_noncircular+0x2cc/0x390 kernel/locking/lockdep.c:2177
 check_prev_add kernel/locking/lockdep.c:3097 [inline]
 check_prevs_add kernel/locking/lockdep.c:3216 [inline]
 validate_chain+0x1898/0x6ae0 kernel/locking/lockdep.c:3831
 __lock_acquire+0x1292/0x1f60 kernel/locking/lockdep.c:5055
 lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668
 __might_fault+0xb2/0x110 mm/memory.c:5647
 _copy_to_user+0x26/0x130 lib/usercopy.c:29
 copy_to_user include/linux/uaccess.h:169 [inline]
 f2fs_ioc_get_encryption_pwsalt fs/f2fs/file.c:2365 [inline]
 __f2fs_ioctl+0xaf72/0xb540 fs/f2fs/file.c:4169
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:856
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f795a28c0c9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f795af93168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f795a3abf80 RCX: 00007f795a28c0c9
RDX: 0000000020000000 RSI: 0000000040106614 RDI: 0000000000000005
RBP: 00007f795a2e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd0421195f R14: 00007f795af93300 R15: 0000000000022000
 </TASK>