REISERFS warning (device loop0): vs-13060 reiserfs_update_sd_size: stat data of object [1 2 0x0 UNKNOWN] (nlink == 1) not found (pos 2)
REISERFS warning: green-16003 errcatch_is_left_mergeable: Invalid item type observed, run fsck ASAP
==================================================================
BUG: KASAN: use-after-free in reiserfs_release_objectid+0x2fc/0x638 fs/reiserfs/objectid.c:130
Read of size 8192 at addr ffff0000fd6c505c by task syz-executor/4335

CPU: 0 PID: 4335 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/06/2026
Call trace:
 dump_backtrace+0x1c4/0x1f0 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
 reiserfs_release_objectid+0x2fc/0x638 fs/reiserfs/objectid.c:130
 remove_save_link+0x234/0x350 fs/reiserfs/super.c:542
 reiserfs_evict_inode+0x308/0x408 fs/reiserfs/inode.c:91
 evict+0x3d8/0x81c fs/inode.c:703
 iput_final fs/inode.c:1832 [inline]
 iput+0x728/0x7e8 fs/inode.c:1858
 do_unlinkat+0x35c/0x504 fs/namei.c:4452
 __do_sys_unlinkat fs/namei.c:4488 [inline]
 __se_sys_unlinkat fs/namei.c:4481 [inline]
 __arm64_sys_unlinkat+0xe0/0xfc fs/namei.c:4481
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x12c 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:589

The buggy address belongs to the physical page:
page:0000000052d4eb59 refcount:2 mapcount:0 mapping:00000000a96b88db index:0x10 pfn:0x13d6c5
memcg:ffff0000cebf8000
aops:def_blk_aops ino:700000
flags: 0x5ffd60000022056(referenced|uptodate|lru|workingset|private|mappedtodisk|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffd60000022056 fffffc0003f5b088 fffffc00038aa588 ffff0000c534bf18
raw: 0000000000000010 ffff0000e1f2c740 00000002ffffffff ffff0000cebf8000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000fd6c5f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000fd6c5f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000fd6c6000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                   ^
 ffff0000fd6c6080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000fd6c6100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
REISERFS warning: green-16003 errcatch_is_left_mergeable: Invalid item type observed, run fsck ASAP