REISERFS (device loop2): using 3.5.x disk format
REISERFS (device loop2): Created .reiserfs_priv - reserved for xattr storage.
==================================================================
BUG: KASAN: out-of-bounds in leaf_paste_entries+0x698/0xb10 fs/reiserfs/lbalance.c:1377
Read of size 18446744073709551554 at addr ffff000138caff7c by task syz-executor.2/30980

CPU: 1 PID: 30980 Comm: syz-executor.2 Not tainted 6.1.23-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:284 [inline]
 print_report+0x174/0x4c0 mm/kasan/report.c:395
 kasan_report+0xd4/0x130 mm/kasan/report.c:495
 kasan_check_range+0x264/0x2a4 mm/kasan/generic.c:189
 memmove+0x48/0x90 mm/kasan/shadow.c:54
 leaf_paste_entries+0x698/0xb10 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+0xa0d4/0xe860 fs/reiserfs/do_balan.c:1452
 do_balance+0x27c/0x788 fs/reiserfs/do_balan.c:1888
 reiserfs_paste_into_item+0x630/0x744 fs/reiserfs/stree.c:2159
 reiserfs_add_entry+0x8ec/0xcc4 fs/reiserfs/namei.c:567
 reiserfs_create+0x490/0x5a4 fs/reiserfs/namei.c:678
 lookup_open fs/namei.c:3413 [inline]
 open_last_lookups fs/namei.c:3481 [inline]
 path_openat+0xeac/0x2548 fs/namei.c:3711
 do_filp_open+0x1bc/0x3cc fs/namei.c:3741
 do_sys_openat2+0x128/0x3d8 fs/open.c:1310
 do_sys_open fs/open.c:1326 [inline]
 __do_sys_openat fs/open.c:1342 [inline]
 __se_sys_openat fs/open.c:1337 [inline]
 __arm64_sys_openat+0x1f0/0x240 fs/open.c:1337
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x168 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:581

The buggy address belongs to the physical page:
page:0000000022e944e1 refcount:2 mapcount:0 mapping:00000000ddf9b0cc index:0x213 pfn:0x178caf
memcg:ffff0000cd7ea000
aops:def_blk_aops ino:700002
flags: 0x5ffce0000002052(referenced|lru|workingset|private|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffce0000002052 fffffc00044a8548 ffff0000cd7ec168 ffff0000c053d510
raw: 0000000000000213 ffff00013488fae0 00000002ffffffff ffff0000cd7ea000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff000138cafe00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff000138cafe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff000138caff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                                                ^
 ffff000138caff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff000138cb0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
REISERFS warning: reiserfs-5094 has_valid_deh_location: directory entry location seems wrong *3.5*[1969793024 1819567463 0x47312e62 UNKNOWN], item_len 24421, item_location 28265, free_space(entry_count) 26465
REISERFS error (device loop2): vs-5150 search_by_key: invalid format found in block 531. Fsck?
REISERFS (device loop2): Remounting filesystem read-only
REISERFS error (device loop2): vs-13050 reiserfs_update_sd_size: i/o failure occurred trying to update [1 2 0x0 SD] stat data