REISERFS warning (device loop0): 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_cut_from_buffer+0x1546/0x2600 fs/reiserfs/lbalance.c:1210 Read of size 18446744073709547936 at addr ffff88805140f000 by task syz.0.35/4597 CPU: 0 PID: 4597 Comm: syz.0.35 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: dump_stack_lvl+0x168/0x22e lib/dump_stack.c:106 print_address_description mm/kasan/report.c:316 [inline] print_report+0xa8/0x210 mm/kasan/report.c:420 kasan_report+0x10b/0x140 mm/kasan/report.c:524 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x27b/0x290 mm/kasan/generic.c:189 memmove+0x25/0x60 mm/kasan/shadow.c:54 leaf_cut_from_buffer+0x1546/0x2600 fs/reiserfs/lbalance.c:1210 leaf_move_items+0xaab/0xde0 fs/reiserfs/lbalance.c:729 leaf_shift_right+0x2a/0xe0 fs/reiserfs/lbalance.c:803 balance_leaf_paste_right_shift fs/reiserfs/do_balan.c:789 [inline] balance_leaf_paste_right fs/reiserfs/do_balan.c:897 [inline] balance_leaf_right fs/reiserfs/do_balan.c:916 [inline] balance_leaf+0xb4cb/0x10e60 fs/reiserfs/do_balan.c:1415 do_balance+0x2fa/0x930 fs/reiserfs/do_balan.c:1888 reiserfs_paste_into_item+0x69b/0x7e0 fs/reiserfs/stree.c:2159 reiserfs_get_block+0x1bdc/0x3ef0 fs/reiserfs/inode.c:1069 __block_write_begin_int+0x54b/0x1a70 fs/buffer.c:1991 reiserfs_write_begin+0x206/0x4c0 fs/reiserfs/inode.c:2775 generic_perform_write+0x2db/0x560 mm/filemap.c:3846 __generic_file_write_iter+0x172/0x430 mm/filemap.c:3974 generic_file_write_iter+0xab/0x2e0 mm/filemap.c:4006 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x44c/0x960 fs/read_write.c:584 ksys_write+0x143/0x240 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f522038ebe9 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:00007f5221141038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f52205c6090 RCX: 00007f522038ebe9 RDX: 0000000000010448 RSI: 0000200000000080 RDI: 0000000000000007 RBP: 00007f5220411e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f52205c6128 R14: 00007f52205c6090 R15: 00007ffddcb0b5a8 The buggy address belongs to the physical page: page:ffffea00014503c0 refcount:2 mapcount:0 mapping:ffff888140d749f8 index:0x55 pfn:0x5140f memcg:ffff888074180000 aops:def_blk_aops ino:700001 flags: 0xfff40000002052(referenced|lru|workingset|private|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff40000002052 ffffea0001450408 ffffea0001450348 ffff888140d749f8 raw: 0000000000000055 ffff888053bb1910 00000002ffffffff ffff888074180000 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 4608, tgid 4605 (syz.1.38), ts 128650546515, free_ts 128642646511 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x173/0x1a0 mm/page_alloc.c:2532 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x1a26/0x1ac0 mm/page_alloc.c:4328 __alloc_pages+0x1df/0x4e0 mm/page_alloc.c:5614 folio_alloc+0x1c/0x60 mm/mempolicy.c:2292 filemap_alloc_folio+0xdb/0x460 mm/filemap.c:999 __filemap_get_folio+0x697/0xdd0 mm/filemap.c:1993 pagecache_get_page+0x26/0x250 mm/folio-compat.c:110 find_or_create_page include/linux/pagemap.h:646 [inline] grow_dev_page fs/buffer.c:946 [inline] grow_buffers fs/buffer.c:1011 [inline] __getblk_slow fs/buffer.c:1038 [inline] __getblk_gfp+0x2d8/0xb20 fs/buffer.c:1333 __getblk include/linux/buffer_head.h:411 [inline] reiserfs_breada fs/reiserfs/journal.c:2338 [inline] journal_read+0x7ff/0x3a20 fs/reiserfs/journal.c:2451 journal_init+0x1a08/0x2450 fs/reiserfs/journal.c:2899 reiserfs_fill_super+0xe91/0x2340 fs/reiserfs/super.c:2022 mount_bdev+0x287/0x3c0 fs/super.c:1443 legacy_get_tree+0xe6/0x180 fs/fs_context.c:632 vfs_get_tree+0x88/0x270 fs/super.c:1573 do_new_mount+0x24a/0xa40 fs/namespace.c:3069 do_mount fs/namespace.c:3412 [inline] __do_sys_mount fs/namespace.c:3620 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3597 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1459 [inline] free_pcp_prepare mm/page_alloc.c:1509 [inline] free_unref_page_prepare+0x8b4/0x9a0 mm/page_alloc.c:3384 free_unref_page_list+0xbb/0x8e0 mm/page_alloc.c:3525 release_pages+0x1f92/0x2200 mm/swap.c:1035 tlb_batch_pages_flush mm/mmu_gather.c:59 [inline] tlb_flush_mmu_free mm/mmu_gather.c:254 [inline] tlb_flush_mmu+0xff/0x210 mm/mmu_gather.c:261 tlb_finish_mmu+0xbd/0x1c0 mm/mmu_gather.c:361 unmap_region+0x272/0x2c0 mm/mmap.c:2343 do_mas_align_munmap+0xc57/0x1220 mm/mmap.c:2592 do_mas_munmap+0x240/0x2b0 mm/mmap.c:2650 __vm_munmap+0x18d/0x290 mm/mmap.c:2936 __do_sys_munmap mm/mmap.c:2961 [inline] __se_sys_munmap mm/mmap.c:2958 [inline] __x64_sys_munmap+0x5c/0x70 mm/mmap.c:2958 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Memory state around the buggy address: ffff88805140ef00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805140ef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88805140f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88805140f080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805140f100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 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