REISERFS warning (device loop1): 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+0x575/0x820 fs/reiserfs/objectid.c:165 Read of size 8188 at addr ffff88805a6a7050 by task syz-executor/5765 CPU: 0 PID: 5765 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xac/0x220 mm/kasan/report.c:468 kasan_report+0x117/0x150 mm/kasan/report.c:581 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x288/0x290 mm/kasan/generic.c:187 __asan_memmove+0x29/0x70 mm/kasan/shadow.c:94 reiserfs_release_objectid+0x575/0x820 fs/reiserfs/objectid.c:165 remove_save_link+0x2ba/0x3c0 fs/reiserfs/super.c:542 reiserfs_evict_inode+0x395/0x490 fs/reiserfs/inode.c:91 evict+0x486/0x870 fs/inode.c:705 d_delete_notify include/linux/fsnotify.h:269 [inline] vfs_rmdir+0x39b/0x4d0 fs/namei.c:4217 do_rmdir+0x29e/0x5c0 fs/namei.c:4263 __do_sys_unlinkat fs/namei.c:4441 [inline] __se_sys_unlinkat fs/namei.c:4435 [inline] __x64_sys_unlinkat+0xc4/0xe0 fs/namei.c:4435 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f900298ed27 Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 07 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcfb44aba8 EFLAGS: 00000207 ORIG_RAX: 0000000000000107 RAX: ffffffffffffffda RBX: 0000000000000065 RCX: 00007f900298ed27 RDX: 0000000000000200 RSI: 00007ffcfb44bd50 RDI: 00000000ffffff9c RBP: 00007f9002a13d7d R08: 000055557628966b R09: 0000000000000000 R10: 0000000000001000 R11: 0000000000000207 R12: 00007ffcfb44bd50 R13: 00007f9002a13d7d R14: 000000000001dc3b R15: 00007ffcfb44df10 The buggy address belongs to the physical page: page:ffffea000169a9c0 refcount:2 mapcount:0 mapping:ffff888148d558f8 index:0x10 pfn:0x5a6a7 memcg:ffff88807caac000 aops:def_blk_aops ino:700001 flags: 0xfff5800002822c(referenced|uptodate|lru|workingset|private|mappedtodisk|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff5800002822c ffffea00016d96c8 ffffea0001d716c8 ffff888148d558f8 raw: 0000000000000010 ffff88805d90d1d0 00000002ffffffff ffff88807caac000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x148c48(GFP_NOFS|__GFP_NOFAIL|__GFP_COMP|__GFP_HARDWALL|__GFP_MOVABLE), pid 6229, tgid 6227 (syz.1.76), ts 120645963588, free_ts 111273447601 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1cd/0x210 mm/page_alloc.c:1554 prep_new_page mm/page_alloc.c:1561 [inline] get_page_from_freelist+0x195c/0x19f0 mm/page_alloc.c:3191 __alloc_pages+0x1e3/0x460 mm/page_alloc.c:4457 folio_alloc+0x1e/0x30 mm/mempolicy.c:2291 filemap_alloc_folio+0xdf/0x470 mm/filemap.c:1004 __filemap_get_folio+0x3ee/0xbc0 mm/filemap.c:1962 grow_dev_page fs/buffer.c:1058 [inline] grow_buffers fs/buffer.c:1118 [inline] __getblk_slow fs/buffer.c:1145 [inline] __getblk_gfp+0x223/0x660 fs/buffer.c:1439 __bread_gfp+0x2a/0x330 fs/buffer.c:1473 sb_bread include/linux/buffer_head.h:326 [inline] read_super_block+0x91/0x7c0 fs/reiserfs/super.c:1604 reiserfs_fill_super+0x7a2/0x2340 fs/reiserfs/super.c:1966 mount_bdev+0x22b/0x2d0 fs/super.c:1643 legacy_get_tree+0xea/0x180 fs/fs_context.c:662 vfs_get_tree+0x8c/0x280 fs/super.c:1764 do_new_mount+0x24b/0xa40 fs/namespace.c:3386 do_mount fs/namespace.c:3726 [inline] __do_sys_mount fs/namespace.c:3935 [inline] __se_sys_mount+0x2da/0x3c0 fs/namespace.c:3912 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1154 [inline] free_unref_page_prepare+0x7ce/0x8e0 mm/page_alloc.c:2336 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429 update_and_free_hugetlb_folio mm/hugetlb.c:1855 [inline] update_and_free_pages_bulk+0xb9/0x1d0 mm/hugetlb.c:1877 return_unused_surplus_pages mm/hugetlb.c:2682 [inline] hugetlb_acct_memory+0xe6c/0xfd0 mm/hugetlb.c:-1 hugetlb_unreserve_pages+0x1ce/0x230 mm/hugetlb.c:6924 remove_inode_hugepages+0x1739/0x18b0 fs/hugetlbfs/inode.c:709 hugetlbfs_evict_inode+0x23/0x70 fs/hugetlbfs/inode.c:716 evict+0x486/0x870 fs/inode.c:705 __dentry_kill+0x431/0x650 fs/dcache.c:611 dentry_kill+0xb8/0x290 fs/dcache.c:-1 dput+0xfe/0x1e0 fs/dcache.c:918 __fput+0x5e5/0x970 fs/file_table.c:392 task_work_run+0x1ce/0x250 kernel/task_work.c:239 exit_task_work include/linux/task_work.h:43 [inline] do_exit+0x90b/0x23c0 kernel/exit.c:883 do_group_exit+0x21b/0x2d0 kernel/exit.c:1024 get_signal+0x12fc/0x1400 kernel/signal.c:2902 Memory state around the buggy address: ffff88805a6a7f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805a6a7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88805a6a8000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff88805a6a8080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88805a6a8100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================