REISERFS warning (device loop0): jdm-13090 reiserfs_new_inode: ACLs aren't enabled in the fs, but vfs thinks they are!
REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage.
==================================================================
BUG: KASAN: use-after-free in leaf_paste_in_buffer+0x650/0xa0c fs/reiserfs/lbalance.c:-1
Read of size 48 at addr ffff0000eaa98ff0 by task syz.0.19/5093

CPU: 1 PID: 5093 Comm: syz.0.19 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
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
 memcpy+0x90/0xe8 mm/kasan/shadow.c:65
 leaf_paste_in_buffer+0x650/0xa0c fs/reiserfs/lbalance.c:-1
 leaf_copy_dir_entries+0x45c/0x788 fs/reiserfs/lbalance.c:108
 leaf_copy_boundary_item+0x888/0x19dc fs/reiserfs/lbalance.c:-1
 leaf_copy_items fs/reiserfs/lbalance.c:551 [inline]
 leaf_move_items+0x694/0xb9c fs/reiserfs/lbalance.c:726
 leaf_shift_left+0xc8/0x3ac fs/reiserfs/lbalance.c:750
 balance_leaf_left fs/reiserfs/do_balan.c:-1 [inline]
 balance_leaf+0xf78/0xd2f4 fs/reiserfs/do_balan.c:1409
 do_balance+0x260/0x778 fs/reiserfs/do_balan.c:1888
 reiserfs_insert_item+0x8a8/0x9f4 fs/reiserfs/stree.c:2261
 add_save_link+0x2d4/0x4c4 fs/reiserfs/super.c:495
 reiserfs_truncate_file+0x308/0x6e4 fs/reiserfs/inode.c:2317
 reiserfs_setattr+0x8c8/0xd70 fs/reiserfs/inode.c:3409
 notify_change+0xa08/0xcd8 fs/attr.c:505
 do_truncate+0x178/0x1f0 fs/open.c:65
 handle_truncate fs/namei.c:3265 [inline]
 do_open fs/namei.c:3612 [inline]
 path_openat+0x211c/0x26e4 fs/namei.c:3742
 do_filp_open+0x164/0x330 fs/namei.c:3769
 do_sys_openat2+0x128/0x3d8 fs/open.c:1253
 do_sys_open fs/open.c:1269 [inline]
 __do_sys_openat fs/open.c:1285 [inline]
 __se_sys_openat fs/open.c:1280 [inline]
 __arm64_sys_openat+0x120/0x154 fs/open.c:1280
 __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:00000000739310a7 refcount:2 mapcount:0 mapping:000000005621ad0e index:0x214 pfn:0x12aa98
memcg:ffff0000ca770000
aops:def_blk_aops ino:700000
flags: 0x5ffc00000002032(referenced|lru|active|private|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000002032 fffffc0003b889c8 fffffc0003ac7c88 ffff0000c049db08
raw: 0000000000000214 ffff0000debeb570 00000002ffffffff ffff0000ca770000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000eaa98f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000eaa98f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000eaa99000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff0000eaa99080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000eaa99100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
REISERFS warning: reiserfs-5093 is_leaf: item entry count seems wrong *3.5*[2 1 0(1) DIR], item_len 35, item_location 3937, free_space(entry_count) 2
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-5657 reiserfs_do_truncate: i/o failure occurred trying to truncate [2 2 0xffffffff DIRECT]
REISERFS warning (device loop0): clm-6006 reiserfs_dirty_inode: writing inode 2 on readonly FS