REISERFS (device loop2): Created .reiserfs_priv - reserved for xattr storage.
REISERFS warning (device loop2): vs-13060 reiserfs_update_sd_size: stat data of object [2 5 0x0 SD] (nlink == 1) not found (pos 2)
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BUG: KASAN: out-of-bounds in leaf_paste_in_buffer+0x1c8/0xa14 fs/reiserfs/lbalance.c:1017
Read of size 18446744073709493643 at addr ffff0000e4ac6275 by task syz.2.1511/8479

CPU: 0 PID: 8479 Comm: syz.2.1511 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call trace:
 dump_backtrace+0x1c0/0x1ec arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 print_address_description+0x88/0x218 mm/kasan/report.c:316
 print_report+0x50/0x68 mm/kasan/report.c:420
 kasan_report+0xa8/0xfc mm/kasan/report.c:524
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x258/0x290 mm/kasan/generic.c:189
 memmove+0x48/0x90 mm/kasan/shadow.c:54
 leaf_paste_in_buffer+0x1c8/0xa14 fs/reiserfs/lbalance.c:1017
 leaf_copy_boundary_item+0x930/0x19dc fs/reiserfs/lbalance.c:199
 leaf_copy_items fs/reiserfs/lbalance.c:551 [inline]
 leaf_move_items+0x6a0/0xbb0 fs/reiserfs/lbalance.c:726
 leaf_shift_left+0xc8/0x3ac fs/reiserfs/lbalance.c:750
 balance_leaf_paste_left_whole fs/reiserfs/do_balan.c:560 [inline]
 balance_leaf_paste_left fs/reiserfs/do_balan.c:594 [inline]
 balance_leaf_left fs/reiserfs/do_balan.c:613 [inline]
 balance_leaf+0x8abc/0xd92c fs/reiserfs/do_balan.c:1409
 do_balance+0x270/0x790 fs/reiserfs/do_balan.c:1888
 reiserfs_paste_into_item+0x5d0/0x6e0 fs/reiserfs/stree.c:2159
 reiserfs_get_block+0x14a0/0x36e8 fs/reiserfs/inode.c:1069
 __block_write_begin_int+0x350/0x1388 fs/buffer.c:1991
 __block_write_begin+0x7c/0xa0 fs/buffer.c:2041
 reiserfs_write_begin+0x328/0x714 fs/reiserfs/inode.c:2775
 generic_cont_expand_simple+0x130/0x208 fs/buffer.c:2347
 reiserfs_setattr+0x51c/0xfec fs/reiserfs/inode.c:3305
 notify_change+0xb0c/0xdcc fs/attr.c:499
 do_truncate+0x188/0x20c fs/open.c:65
 do_sys_ftruncate+0x284/0x31c 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+0x98/0x2b4 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 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:585

The buggy address belongs to the physical page:
page:0000000033f279d3 refcount:3 mapcount:1 mapping:000000008ed937cf index:0x5f3 pfn:0x124ac6
memcg:ffff0000cd044000
aops:ext4_da_aops ino:757 dentry name(?):"syz.fgodFY"
flags: 0x5ffe60000002056(referenced|uptodate|lru|workingset|private|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffe60000002056 fffffc000392b148 fffffc000392b1c8 ffff0000e0710ee0
raw: 00000000000005f3 ffff0000e05c1cb0 0000000300000000 ffff0000cd044000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000e4ac6100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000e4ac6180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000e4ac6200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                                             ^
 ffff0000e4ac6280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000e4ac6300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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