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BUG: KASAN: out-of-bounds in leaf_paste_entries+0x963/0x13a0 fs/reiserfs/lbalance.c:1377
Read of size 18446744073709551584 at addr ffff88802af5afa4 by task syz-executor.1/10472

CPU: 1 PID: 10472 Comm: syz-executor.1 Not tainted 6.7.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0x163/0x540 mm/kasan/report.c:475
 kasan_report+0x142/0x170 mm/kasan/report.c:588
 kasan_check_range+0x27e/0x290 mm/kasan/generic.c:187
 __asan_memmove+0x29/0x70 mm/kasan/shadow.c:94
 leaf_paste_entries+0x963/0x13a0 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+0xbd22/0x12510 fs/reiserfs/do_balan.c:1452
 do_balance+0x30d/0x8f0 fs/reiserfs/do_balan.c:1888
 reiserfs_paste_into_item+0x734/0x880 fs/reiserfs/stree.c:2158
 reiserfs_add_entry+0x9bc/0xd50 fs/reiserfs/namei.c:565
 reiserfs_mkdir+0x6c0/0x8f0 fs/reiserfs/namei.c:860
 xattr_mkdir fs/reiserfs/xattr.c:77 [inline]
 create_privroot fs/reiserfs/xattr.c:891 [inline]
 reiserfs_xattr_init+0x355/0x6c0 fs/reiserfs/xattr.c:1007
 reiserfs_fill_super+0x2207/0x2620 fs/reiserfs/super.c:2175
 mount_bdev+0x237/0x300 fs/super.c:1650
 legacy_get_tree+0xef/0x190 fs/fs_context.c:662
 vfs_get_tree+0x8c/0x2a0 fs/super.c:1771
 do_new_mount+0x28f/0xae0 fs/namespace.c:3337
 do_mount fs/namespace.c:3677 [inline]
 __do_sys_mount fs/namespace.c:3886 [inline]
 __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3863
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f032b67e3ea
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f032a1fdee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f032a1fdf80 RCX: 00007f032b67e3ea
RDX: 0000000020000540 RSI: 0000000020000140 RDI: 00007f032a1fdf40
RBP: 0000000020000540 R08: 00007f032a1fdf80 R09: 000000000120408a
R10: 000000000120408a R11: 0000000000000202 R12: 0000000020000140
R13: 00007f032a1fdf40 R14: 000000000000111f R15: 0000000020002a40
 </TASK>

The buggy address belongs to the physical page:
page:ffffea0000abd680 refcount:2 mapcount:0 mapping:ffff88801b13cd78 index:0x213 pfn:0x2af5a
memcg:ffff88805bc4e000
aops:def_blk_aops ino:700001
flags: 0xfff00000008124(referenced|lru|active|private|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000008124 ffffea00017de8c8 ffff88806951d030 ffff88801b13cd78
raw: 0000000000000213 ffff888081a97828 00000002ffffffff ffff88805bc4e000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Movable, gfp_mask 0x148c48(GFP_NOFS|__GFP_NOFAIL|__GFP_COMP|__GFP_HARDWALL|__GFP_MOVABLE), pid 10472, tgid 10471 (syz-executor.1), ts 460805872294, free_ts 455847544914
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1537
 prep_new_page mm/page_alloc.c:1544 [inline]
 get_page_from_freelist+0x33ea/0x3570 mm/page_alloc.c:3312
 __alloc_pages+0x255/0x680 mm/page_alloc.c:4568
 alloc_pages_mpol+0x3de/0x640 mm/mempolicy.c:2133
 alloc_pages mm/mempolicy.c:2204 [inline]
 folio_alloc+0x12a/0x330 mm/mempolicy.c:2211
 filemap_alloc_folio+0xde/0x500 mm/filemap.c:974
 __filemap_get_folio+0x431/0xbb0 mm/filemap.c:1918
 grow_dev_page fs/buffer.c:1041 [inline]
 grow_buffers fs/buffer.c:1106 [inline]
 __getblk_slow fs/buffer.c:1133 [inline]
 bdev_getblk+0x243/0x6d0 fs/buffer.c:1429
 __getblk include/linux/buffer_head.h:358 [inline]
 sb_getblk include/linux/buffer_head.h:364 [inline]
 search_by_key+0x4a2/0x4940 fs/reiserfs/stree.c:672
 reiserfs_read_locked_inode+0x240/0x2950 fs/reiserfs/inode.c:1543
 reiserfs_fill_super+0x1363/0x2620 fs/reiserfs/super.c:2071
 mount_bdev+0x237/0x300 fs/super.c:1650
 legacy_get_tree+0xef/0x190 fs/fs_context.c:662
 vfs_get_tree+0x8c/0x2a0 fs/super.c:1771
 do_new_mount+0x28f/0xae0 fs/namespace.c:3337
 do_mount fs/namespace.c:3677 [inline]
 __do_sys_mount fs/namespace.c:3886 [inline]
 __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3863
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1137 [inline]
 free_unref_page_prepare+0x931/0xa60 mm/page_alloc.c:2347
 free_unref_page_list+0x5a0/0x840 mm/page_alloc.c:2533
 release_pages+0x2117/0x2400 mm/swap.c:1042
 __folio_batch_release+0x84/0x100 mm/swap.c:1062
 folio_batch_release include/linux/pagevec.h:83 [inline]
 shmem_undo_range+0x6b5/0x1da0 mm/shmem.c:1004
 shmem_truncate_range mm/shmem.c:1113 [inline]
 shmem_evict_inode+0x29b/0xa60 mm/shmem.c:1241
 evict+0x2a4/0x630 fs/inode.c:666
 __dentry_kill+0x436/0x660 fs/dcache.c:607
 dentry_kill+0xbb/0x290
 dput+0x21e/0x470 fs/dcache.c:913
 __fput+0x60b/0x9e0 fs/file_table.c:402
 __do_sys_close fs/open.c:1587 [inline]
 __se_sys_close fs/open.c:1572 [inline]
 __x64_sys_close+0x7e/0x100 fs/open.c:1572
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

Memory state around the buggy address:
 ffff88802af5ae80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88802af5af00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88802af5af80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                               ^
 ffff88802af5b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88802af5b080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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