REISERFS (device loop6): checking transaction log (loop6) REISERFS (device loop6): Using r5 hash to sort names ================================================================== BUG: KASAN: out-of-bounds in leaf_paste_entries+0x7a9/0x1110 fs/reiserfs/lbalance.c:1377 Read of size 18446744073709551584 at addr ffff88806da3dfa4 by task syz.6.265/7301 CPU: 0 PID: 7301 Comm: syz.6.265 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_entries+0x7a9/0x1110 fs/reiserfs/lbalance.c:1377 balance_leaf_finish_node_paste_dirent fs/reiserfs/do_balan.c:1295 [inline] balance_leaf_finish_node_paste fs/reiserfs/do_balan.c:1321 [inline] balance_leaf_finish_node fs/reiserfs/do_balan.c:1364 [inline] balance_leaf+0xac49/0x10da0 fs/reiserfs/do_balan.c:1452 do_balance+0x2fe/0x940 fs/reiserfs/do_balan.c:1888 reiserfs_paste_into_item+0x6a1/0x7f0 fs/reiserfs/stree.c:2157 reiserfs_add_entry+0x978/0xd90 fs/reiserfs/namei.c:565 reiserfs_mkdir+0x693/0x970 fs/reiserfs/namei.c:860 xattr_mkdir fs/reiserfs/xattr.c:77 [inline] create_privroot fs/reiserfs/xattr.c:891 [inline] reiserfs_xattr_init+0x33c/0x6a0 fs/reiserfs/xattr.c:1007 reiserfs_fill_super+0x1f85/0x2340 fs/reiserfs/super.c:2175 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 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7f19c8190eea Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 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:00007f19c8ff7e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f19c8ff7ef0 RCX: 00007f19c8190eea RDX: 0000200000000000 RSI: 00002000000000c0 RDI: 00007f19c8ff7eb0 RBP: 0000200000000000 R08: 00007f19c8ff7ef0 R09: 0000000000008488 R10: 0000000000008488 R11: 0000000000000246 R12: 00002000000000c0 R13: 00007f19c8ff7eb0 R14: 0000000000001101 R15: 0000200000000780 The buggy address belongs to the physical page: page:ffffea0001b68f40 refcount:3 mapcount:0 mapping:ffff88801fe96ff8 index:0x213 pfn:0x6da3d memcg:ffff88801b78a000 aops:def_blk_aops ino:700006 flags: 0xfff18000008204(referenced|workingset|private|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff18000008204 0000000000000000 dead000000000122 ffff88801fe96ff8 raw: 0000000000000213 ffff88805e404570 00000003ffffffff ffff88801b78a000 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 7301, tgid 7300 (syz.6.265), ts 254913222099, free_ts 254690770043 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 sb_getblk include/linux/buffer_head.h:344 [inline] search_by_key+0x41d/0x4630 fs/reiserfs/stree.c:672 reiserfs_read_locked_inode+0x158/0x2640 fs/reiserfs/inode.c:1547 reiserfs_fill_super+0x11f0/0x2340 fs/reiserfs/super.c:2071 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_list+0xbe/0x860 mm/page_alloc.c:2475 release_pages+0x1fa0/0x2220 mm/swap.c:1022 __folio_batch_release+0x71/0xe0 mm/swap.c:1042 folio_batch_release include/linux/pagevec.h:83 [inline] shmem_undo_range+0x5d0/0x1a40 mm/shmem.c:1026 shmem_truncate_range mm/shmem.c:1135 [inline] shmem_evict_inode+0x273/0xa70 mm/shmem.c:1264 evict+0x486/0x870 fs/inode.c:705 do_unlinkat+0x37b/0x570 fs/namei.c:4406 __do_sys_unlink fs/namei.c:4447 [inline] __se_sys_unlink fs/namei.c:4445 [inline] __x64_sys_unlink+0x49/0x50 fs/namei.c:4445 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 Memory state around the buggy address: ffff88806da3de80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88806da3df00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88806da3df80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88806da3e000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88806da3e080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================