==================================================================
BUG: KASAN: out-of-bounds in leaf_paste_entries+0x684/0xae0 fs/reiserfs/lbalance.c:1377
Read of size 18446744073709551584 at addr ffff0000e1af3fa4 by task syz.0.848/7225

CPU: 1 PID: 7225 Comm: syz.0.848 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 print_address_description+0x88/0x218 mm/kasan/report.c:316
 print_report+0x50/0x68 mm/kasan/report.c:420
 kasan_report+0xa8/0x100 mm/kasan/report.c:524
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x260/0x2a0 mm/kasan/generic.c:189
 memmove+0x48/0x90 mm/kasan/shadow.c:54
 leaf_paste_entries+0x684/0xae0 fs/reiserfs/lbalance.c:1377
 balance_leaf_finish_node_paste_dirent fs/reiserfs/do_balan.c:1295 [inline]
 balance_leaf_finish_node_paste fs/reiserfs/do_balan.c:1321 [inline]
 balance_leaf_finish_node fs/reiserfs/do_balan.c:1364 [inline]
 balance_leaf+0x81d0/0xd2f4 fs/reiserfs/do_balan.c:1452
 do_balance+0x260/0x774 fs/reiserfs/do_balan.c:1888
 reiserfs_paste_into_item+0x5b4/0x6d0 fs/reiserfs/stree.c:2159
 reiserfs_add_entry+0x828/0xbe4 fs/reiserfs/namei.c:567
 reiserfs_mkdir+0x588/0x788 fs/reiserfs/namei.c:862
 xattr_mkdir fs/reiserfs/xattr.c:76 [inline]
 create_privroot fs/reiserfs/xattr.c:882 [inline]
 reiserfs_xattr_init+0x2b0/0x6bc fs/reiserfs/xattr.c:1005
 reiserfs_fill_super+0x192c/0x1d40 fs/reiserfs/super.c:2175
 mount_bdev+0x264/0x358 fs/super.c:1443
 get_super_block+0x44/0x58 fs/reiserfs/super.c:2601
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:632
 vfs_get_tree+0x90/0x274 fs/super.c:1573
 do_new_mount+0x228/0x810 fs/namespace.c:3078
 path_mount+0x5b4/0xe78 fs/namespace.c:3408
 do_mount fs/namespace.c:3421 [inline]
 __do_sys_mount fs/namespace.c:3629 [inline]
 __se_sys_mount fs/namespace.c:3606 [inline]
 __arm64_sys_mount+0x49c/0x584 fs/namespace.c:3606
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

The buggy address belongs to the physical page:
page:00000000f83a39cf refcount:2 mapcount:0 mapping:00000000ff223651 index:0x213 pfn:0x121af3
memcg:ffff0000cd956000
aops:def_blk_aops ino:700000
flags: 0x5ffd60000002052(referenced|lru|workingset|private|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffd60000002052 fffffc0004031788 ffff0000cd952208 ffff0000c058bf10
raw: 0000000000000213 ffff0000e054f658 00000002ffffffff ffff0000cd956000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000e1af3e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000e1af3f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000e1af3f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                               ^
 ffff0000e1af4000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000e1af4080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
REISERFS warning: reiserfs-5094 has_valid_deh_location: directory entry location seems wrong *3.5*[1768256046 1718773107 0x72705f73 UNKNOWN], item_len 16872, item_location 2, free_space(entry_count) 21376
REISERFS error (device loop0): vs-5150 search_by_key: invalid format found in block 531. Fsck?
REISERFS (device loop0): Remounting filesystem read-only
REISERFS error (device loop0): vs-13050 reiserfs_update_sd_size: i/o failure occurred trying to update [1 2 0x0 SD] stat data
REISERFS warning (device loop0): jdm-20006 create_privroot: xattrs/ACLs enabled and couldn't find/create .reiserfs_priv. Failing mount.
REISERFS warning: reiserfs-5094 has_valid_deh_location: directory entry location seems wrong *3.5*[1768256046 1718773107 0x72705f73 UNKNOWN], item_len 16872, item_location 2, free_space(entry_count) 21376
REISERFS error (device loop0): vs-5150 search_by_key: invalid format found in block 531. Fsck?
REISERFS error (device loop0): zam-7001 reiserfs_find_entry: io error
loop0: detected capacity change from 0 to 32768
XFS: noikeep mount option is deprecated.
XFS (loop0): Mounting V5 Filesystem
XFS (loop0): Torn write (CRC failure) detected at log block 0x30. Truncating head block from 0x51.
XFS (loop0): Starting recovery (logdev: internal)
XFS (loop0): Ending recovery (logdev: internal)
XFS (loop0): Metadata corruption detected at xfs_inobt_verify+0xb0/0x204 fs/xfs/libxfs/xfs_ialloc_btree.c:-1, xfs_finobt block 0x8 
XFS (loop0): Unmount and run xfs_repair
XFS (loop0): First 128 bytes of corrupted metadata buffer:
00000000: 41 42 33 42 00 00 00 02 ff ff ff ff ff ff ff ff  AB3B............
00000010: 00 00 00 00 00 00 00 08 00 00 00 01 00 00 00 10  ................
00000020: c4 96 e0 5e 54 0d 4c 72 b5 91 04 d7 9d 8b 4e eb  ...^T.Lr......N.
00000030: 00 00 00 00 c8 fc 31 e4 00 00 04 4e 00 00 00 02  ......1....N....
00000040: 00 00 04 60 00 00 0b a0 00 00 00 00 00 00 00 00  ...`............
00000050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
00000060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
00000070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
XFS (loop0): metadata I/O error in "xfs_btree_read_buf_block+0x180/0x284" at daddr 0x8 len 8 error 117
XFS (loop0): Failed to initialize disk quotas.