REISERFS warning (device loop2): vs-13060 reiserfs_update_sd_size: stat data of object [2 5 0x0 SD] (nlink == 1) not found (pos 2) REISERFS warning (device loop2): vs-13060 reiserfs_update_sd_size: stat data of object [2 5 0x0 SD] (nlink == 1) not found (pos 1) ================================================================== BUG: KASAN: out-of-bounds in leaf_paste_in_buffer+0x1e0/0xbd0 fs/reiserfs/lbalance.c:1017 Read of size 18446744073709493643 at addr ffff88805a811275 by task syz.2.125/6439 CPU: 1 PID: 6439 Comm: syz.2.125 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 leaf_paste_in_buffer+0x1e0/0xbd0 fs/reiserfs/lbalance.c:1017 leaf_copy_boundary_item+0xc79/0x2180 fs/reiserfs/lbalance.c:199 leaf_copy_items fs/reiserfs/lbalance.c:551 [inline] leaf_move_items+0x8b5/0xe90 fs/reiserfs/lbalance.c:726 leaf_shift_left+0xbd/0x450 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+0x2f14/0x10da0 fs/reiserfs/do_balan.c:1409 do_balance+0x2fe/0x940 fs/reiserfs/do_balan.c:1888 reiserfs_paste_into_item+0x6a1/0x7f0 fs/reiserfs/stree.c:2157 reiserfs_get_block+0x1bd3/0x3ed0 fs/reiserfs/inode.c:1069 __block_write_begin_int+0x566/0x1ad0 fs/buffer.c:2124 reiserfs_write_begin+0x20a/0x4c0 fs/reiserfs/inode.c:2771 generic_perform_write+0x2fb/0x5b0 mm/filemap.c:4031 generic_file_write_iter+0xaf/0x2e0 mm/filemap.c:4152 call_write_iter include/linux/fs.h:2018 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x43b/0x940 fs/read_write.c:584 ksys_pwrite64 fs/read_write.c:699 [inline] __do_sys_pwrite64 fs/read_write.c:709 [inline] __se_sys_pwrite64 fs/read_write.c:706 [inline] __x64_sys_pwrite64+0x195/0x220 fs/read_write.c:706 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: 0033:0x7ff70d38f749 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007ff70e25f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000012 RAX: ffffffffffffffda RBX: 00007ff70d5e6090 RCX: 00007ff70d38f749 RDX: 0000000000000001 RSI: 000020000001f900 RDI: 000000000000000a RBP: 00007ff70d413f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000008000c63 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ff70d5e6128 R14: 00007ff70d5e6090 R15: 00007fffc740ee98 The buggy address belongs to the physical page: page:ffffea00016a0440 refcount:1 mapcount:0 mapping:ffff8880785940d8 index:0x142c pfn:0x5a811 memcg:ffff88801d362000 aops:ext4_da_aops ino:7e5 dentry name(?):"syz.wKxhCK" flags: 0xfff9800000022c(referenced|uptodate|lru|workingset|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff9800000022c ffffea00016a0408 ffffea00016a0488 ffff8880785940d8 raw: 000000000000142c 0000000000000000 00000001ffffffff ffff88801d362000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Movable, gfp_mask 0x152c4a(GFP_NOFS|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL|__GFP_MOVABLE), pid 5872, tgid 5872 (syz.3.6), ts 92458652370, free_ts 27180491085 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 page_cache_ra_unbounded+0x17b/0x770 mm/readahead.c:247 do_async_mmap_readahead mm/filemap.c:3274 [inline] filemap_fault+0x541/0x15a0 mm/filemap.c:3328 __do_fault+0x13b/0x4e0 mm/memory.c:4244 do_read_fault mm/memory.c:4638 [inline] do_fault mm/memory.c:4775 [inline] do_pte_missing mm/memory.c:3689 [inline] handle_pte_fault mm/memory.c:5047 [inline] __handle_mm_fault mm/memory.c:5188 [inline] handle_mm_fault+0x3886/0x4920 mm/memory.c:5353 faultin_page mm/gup.c:868 [inline] __get_user_pages+0x5ea/0x1470 mm/gup.c:1167 __get_user_pages_locked mm/gup.c:1431 [inline] get_dump_page+0x103/0x200 mm/gup.c:1939 dump_user_range+0x12c/0x800 fs/coredump.c:982 elf_core_dump+0x3114/0x36e0 fs/binfmt_elf.c:2184 do_coredump+0x1755/0x2480 fs/coredump.c:833 get_signal+0x1133/0x1400 kernel/signal.c:2888 arch_do_signal_or_restart+0x9c/0x7b0 arch/x86/kernel/signal.c:310 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 free_contig_range+0xa1/0x160 mm/page_alloc.c:6369 destroy_args+0x80/0x850 mm/debug_vm_pgtable.c:1015 debug_vm_pgtable+0x3cc/0x410 mm/debug_vm_pgtable.c:1400 do_one_initcall+0x1fd/0x750 init/main.c:1250 do_initcall_level+0x137/0x1f0 init/main.c:1312 do_initcalls+0x69/0xd0 init/main.c:1328 kernel_init_freeable+0x3d2/0x570 init/main.c:1565 kernel_init+0x1d/0x1c0 init/main.c:1455 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293 Memory state around the buggy address: ffff88805a811100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805a811180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88805a811200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88805a811280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805a811300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================