REISERFS warning: green-16003 errcatch_is_left_mergeable: Invalid item type observed, run fsck ASAP
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BUG: KASAN: use-after-free in reiserfs_release_objectid+0x468/0x688 fs/reiserfs/objectid.c:165
Read of size 8188 at addr ffff0000f655f050 by task syz.6.462/7160

CPU: 0 PID: 7160 Comm: syz.6.462 Not tainted 6.1.131-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
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:316 [inline]
 print_report+0x174/0x4c0 mm/kasan/report.c:427
 kasan_report+0xd4/0x130 mm/kasan/report.c:531
 kasan_check_range+0x264/0x2a4 mm/kasan/generic.c:189
 memmove+0x48/0x90 mm/kasan/shadow.c:54
 reiserfs_release_objectid+0x468/0x688 fs/reiserfs/objectid.c:165
 remove_save_link+0x2a0/0x460 fs/reiserfs/super.c:542
 reiserfs_evict_inode+0x304/0x3f0 fs/reiserfs/inode.c:91
 evict+0x418/0x894 fs/inode.c:705
 iput_final fs/inode.c:1834 [inline]
 iput+0x7c0/0x8a4 fs/inode.c:1860
 d_delete_notify include/linux/fsnotify.h:267 [inline]
 vfs_rmdir+0x330/0x43c fs/namei.c:4204
 do_rmdir+0x2e0/0x720 fs/namei.c:4252
 __do_sys_unlinkat fs/namei.c:4432 [inline]
 __se_sys_unlinkat fs/namei.c:4426 [inline]
 __arm64_sys_unlinkat+0xe0/0xfc fs/namei.c:4426
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 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:585

The buggy address belongs to the physical page:
page:00000000d8a0dd36 refcount:2 mapcount:0 mapping:0000000036c99de5 index:0x10 pfn:0x13655f
memcg:ffff0000ea7d4000
aops:def_blk_aops ino:700006
flags: 0x5ffd20000002052(referenced|lru|workingset|private|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffd20000002052 fffffc0003d95788 fffffc0003ecd208 ffff0000c0499310
raw: 0000000000000010 ffff0000df5dd740 00000002ffffffff ffff0000ea7d4000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000f655ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000f655ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000f6560000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff0000f6560080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000f6560100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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