REISERFS (device loop7): Using tea hash to sort names
==================================================================
BUG: KASAN: out-of-bounds in leaf_paste_entries+0x4d8/0x924 fs/reiserfs/lbalance.c:1377
Read of size 18446744073709551584 at addr ffff0000ddaa9fa4 by task syz.7.167/5139

CPU: 0 PID: 5139 Comm: syz.7.167 Not tainted 5.15.181-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Call trace:
 dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 print_address_description+0x78/0x30c mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0xec/0x15c mm/kasan/report.c:451
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x270/0x2b0 mm/kasan/generic.c:189
 memmove+0x90/0xe8 mm/kasan/shadow.c:54
 leaf_paste_entries+0x4d8/0x924 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+0x260/0x778 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:889 [inline]
 reiserfs_xattr_init+0x2b0/0x6dc fs/reiserfs/xattr.c:1012
 reiserfs_fill_super+0x17ec/0x1bb4 fs/reiserfs/super.c:2179
 mount_bdev+0x264/0x358 fs/super.c:1400
 get_super_block+0x44/0x58 fs/reiserfs/super.c:2608
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:611
 vfs_get_tree+0x90/0x274 fs/super.c:1530
 do_new_mount+0x228/0x810 fs/namespace.c:3013
 path_mount+0x5b4/0x1000 fs/namespace.c:3343
 do_mount fs/namespace.c:3356 [inline]
 __do_sys_mount fs/namespace.c:3564 [inline]
 __se_sys_mount fs/namespace.c:3541 [inline]
 __arm64_sys_mount+0x514/0x5e4 fs/namespace.c:3541
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

The buggy address belongs to the page:
page:000000001939524a refcount:2 mapcount:0 mapping:000000009e806370 index:0x213 pfn:0x11daa9
memcg:ffff0000d6c94000
aops:def_blk_aops ino:700007
flags: 0x5ffc00000002032(referenced|lru|active|private|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000002032 fffffc0003762fc8 ffff0000d72d5030 ffff0000c0592c08
raw: 0000000000000213 ffff0000e8ab91d0 00000002ffffffff ffff0000d6c94000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000ddaa9e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000ddaa9f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000ddaa9f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                               ^
 ffff0000ddaaa000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000ddaaa080: 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 29662, item_location 2, free_space(entry_count) 37376
REISERFS error (device loop7): vs-5150 search_by_key: invalid format found in block 531. Fsck?
REISERFS (device loop7): Remounting filesystem read-only
REISERFS error (device loop7): vs-13050 reiserfs_update_sd_size: i/o failure occurred trying to update [1 2 0x0 SD] stat data
REISERFS warning (device loop7): 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 29662, item_location 2, free_space(entry_count) 37376
REISERFS error (device loop7): vs-5150 search_by_key: invalid format found in block 531. Fsck?
REISERFS error (device loop7): zam-7001 reiserfs_find_entry: io error
loop7: detected capacity change from 0 to 64