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+0x2e4/0x614 fs/reiserfs/objectid.c:130
Read of size 8184 at addr ffff0000fa3a105c by task syz-executor/4578

CPU: 0 PID: 4578 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 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+0xa8/0x100 mm/kasan/report.c:524
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x260/0x2a0 mm/kasan/generic.c:189
 memmove+0x48/0x90 mm/kasan/shadow.c:54
 reiserfs_release_objectid+0x2e4/0x614 fs/reiserfs/objectid.c:130
 remove_save_link+0x21c/0x320 fs/reiserfs/super.c:542
 reiserfs_evict_inode+0x2f8/0x3e4 fs/reiserfs/inode.c:91
 evict+0x3c8/0x810 fs/inode.c:705
 iput_final fs/inode.c:1834 [inline]
 iput+0x764/0x7f4 fs/inode.c:1860
 d_delete_notify include/linux/fsnotify.h:267 [inline]
 vfs_rmdir+0x32c/0x438 fs/namei.c:4204
 do_rmdir+0x238/0x50c fs/namei.c:4252
 __do_sys_unlinkat fs/namei.c:4432 [inline]
 __se_sys_unlinkat fs/namei.c:4426 [inline]
 __arm64_sys_unlinkat+0xcc/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+0x58/0x138 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:00000000302a0c52 refcount:2 mapcount:0 mapping:000000009160e887 index:0x10 pfn:0x13a3a1
memcg:ffff0000e5c0e000
aops:def_blk_aops ino:700005
flags: 0x5ffd60000022056(referenced|uptodate|lru|workingset|private|mappedtodisk|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffd60000022056 fffffc0003e8e888 fffffc0003e8e808 ffff0000c04a0810
raw: 0000000000000010 ffff0000fa514000 00000002ffffffff ffff0000e5c0e000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000fa3a2f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000fa3a2f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000fa3a3000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff0000fa3a3080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000fa3a3100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
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