REISERFS (device loop3): Using tea hash to sort names
REISERFS (device loop3): Created .reiserfs_priv - reserved for xattr storage.
==================================================================
BUG: KASAN: out-of-bounds in leaf_paste_in_buffer+0x1a8/0x9f0 fs/reiserfs/lbalance.c:1017
Read of size 18446744073709551384 at addr ffff0000eb3f1000 by task syz.3.207/4962

CPU: 1 PID: 4962 Comm: syz.3.207 Not tainted 5.15.178-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x174/0x1e4 mm/kasan/report.c:451
 kasan_check_range+0x274/0x2b4 mm/kasan/generic.c:189
 memmove+0x90/0xe8 mm/kasan/shadow.c:54
 leaf_paste_in_buffer+0x1a8/0x9f0 fs/reiserfs/lbalance.c:1017
 balance_leaf_new_nodes_paste_whole fs/reiserfs/do_balan.c:1171 [inline]
 balance_leaf_new_nodes_paste fs/reiserfs/do_balan.c:1215 [inline]
 balance_leaf_new_nodes fs/reiserfs/do_balan.c:1246 [inline]
 balance_leaf+0x5eec/0xe860 fs/reiserfs/do_balan.c:1450
 do_balance+0x27c/0x790 fs/reiserfs/do_balan.c:1888
 reiserfs_paste_into_item+0x630/0x744 fs/reiserfs/stree.c:2159
 reiserfs_get_block+0x1820/0x3fd0 fs/reiserfs/inode.c:1077
 __block_write_begin_int+0x3ec/0x1608 fs/buffer.c:2012
 __block_write_begin+0x40/0x54 fs/buffer.c:2062
 reiserfs_write_begin+0x3c8/0x654 fs/reiserfs/inode.c:2790
 pagecache_write_begin+0xa0/0xc0 mm/filemap.c:3608
 generic_cont_expand_simple+0x12c/0x208 fs/buffer.c:2362
 reiserfs_setattr+0x37c/0xd94 fs/reiserfs/inode.c:3319
 notify_change+0xa34/0xcf8 fs/attr.c:505
 do_truncate+0x1c0/0x28c fs/open.c:65
 do_sys_ftruncate+0x288/0x31c fs/open.c:193
 __do_sys_ftruncate fs/open.c:204 [inline]
 __se_sys_ftruncate fs/open.c:202 [inline]
 __arm64_sys_ftruncate+0x60/0x74 fs/open.c:202
 __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+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 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:0000000033090600 refcount:2 mapcount:0 mapping:0000000044b8c7d0 index:0x0 pfn:0x12b3f1
memcg:ffff0000d97c0000
aops:reiserfs_address_space_operations ino:4 dentry name:"cpuset.effective_cpus"
flags: 0x5ffc00000002014(uptodate|lru|private|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000002014 fffffc0003b71108 ffff0000d7dd4020 ffff0000e92690f8
raw: 0000000000000000 ffff0000e9178740 00000002ffffffff ffff0000d97c0000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000eb3f0f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000eb3f0f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000eb3f1000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                   ^
 ffff0000eb3f1080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000eb3f1100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
REISERFS warning: reiserfs-5090 is_tree_node: node level 0 does not match to the expected one 1
REISERFS error (device loop3): vs-5150 search_by_key: invalid format found in block 531. Fsck?
REISERFS (device loop3): Remounting filesystem read-only
REISERFS warning: reiserfs-5090 is_tree_node: node level 0 does not match to the expected one 1
REISERFS error (device loop3): vs-5150 search_by_key: invalid format found in block 531. Fsck?
REISERFS error (device loop3): clm-6001 reiserfs_truncate_file: grab_tail_page failed -5
REISERFS warning: reiserfs-5090 is_tree_node: node level 0 does not match to the expected one 1
REISERFS error (device loop3): vs-5150 search_by_key: invalid format found in block 531. Fsck?
REISERFS error (device loop3): vs-13050 reiserfs_update_sd_size: i/o failure occurred trying to update [2 4 0x0 SD] stat data