================================================================== BUG: KASAN: slab-out-of-bounds in ntfs_filldir fs/ntfs/dir.c:1021 [inline] BUG: KASAN: slab-out-of-bounds in ntfs_readdir+0xdda/0x3550 fs/ntfs/dir.c:1200 Read of size 1 at addr ffff888024b6c5e1 by task syz-executor/4816 CPU: 0 PID: 4816 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 Call Trace: dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106 print_address_description+0x60/0x2d0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:434 [inline] kasan_report+0xdf/0x130 mm/kasan/report.c:451 ntfs_filldir fs/ntfs/dir.c:1021 [inline] ntfs_readdir+0xdda/0x3550 fs/ntfs/dir.c:1200 iterate_dir+0x218/0x560 fs/readdir.c:-1 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64+0xe5/0x260 fs/readdir.c:354 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f1d86ea1553 Code: c1 66 0f 1f 44 00 00 48 83 c4 08 48 89 ef 5b 5d e9 52 3e f8 ff 66 90 b8 ff ff ff 7f 48 39 c2 48 0f 47 d0 b8 d9 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 c7 c2 a8 ff ff ff f7 d8 RSP: 002b:00007ffdd1971778 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 000055555986b600 RCX: 00007f1d86ea1553 RDX: 0000000000008000 RSI: 000055555986b600 RDI: 0000000000000005 RBP: 000055555986b5d4 R08: 0000000000028a41 R09: 0000000000000000 R10: 00007f1d87077cc0 R11: 0000000000000293 R12: ffffffffffffffa8 R13: 0000000000000010 R14: 000055555986b5d0 R15: 00007ffdd1973a30 Allocated by task 4816: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:434 [inline] ____kasan_kmalloc mm/kasan/common.c:513 [inline] __kasan_kmalloc+0xb5/0xf0 mm/kasan/common.c:522 kmalloc include/linux/slab.h:609 [inline] ntfs_readdir+0x798/0x3550 fs/ntfs/dir.c:1162 iterate_dir+0x218/0x560 fs/readdir.c:-1 __do_sys_getdents64 fs/readdir.c:369 [inline] __se_sys_getdents64+0xe5/0x260 fs/readdir.c:354 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 The buggy address belongs to the object at ffff888024b6c580 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 33 bytes to the right of 64-byte region [ffff888024b6c580, ffff888024b6c5c0) The buggy address belongs to the page: page:ffffea000092db00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x24b6c flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0000adbd40 0000000c0000000c ffff888016841640 raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY), pid 3562, ts 15734473038, free_ts 13669575275 prep_new_page mm/page_alloc.c:2426 [inline] get_page_from_freelist+0x1b77/0x1c60 mm/page_alloc.c:4192 __alloc_pages+0x1e1/0x470 mm/page_alloc.c:5487 alloc_slab_page mm/slub.c:1780 [inline] allocate_slab mm/slub.c:1917 [inline] new_slab+0xc0/0x4b0 mm/slub.c:1980 ___slab_alloc+0x81e/0xdf0 mm/slub.c:3013 __slab_alloc mm/slub.c:3100 [inline] slab_alloc_node mm/slub.c:3191 [inline] slab_alloc mm/slub.c:3233 [inline] __kmalloc+0x1cd/0x330 mm/slub.c:4408 kmalloc include/linux/slab.h:609 [inline] kzalloc include/linux/slab.h:735 [inline] tomoyo_encode2 security/tomoyo/realpath.c:45 [inline] tomoyo_encode+0x27e/0x540 security/tomoyo/realpath.c:80 tomoyo_realpath_from_path+0x5cd/0x610 security/tomoyo/realpath.c:288 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x1cd/0x510 security/tomoyo/file.c:822 security_inode_getattr+0xcf/0x120 security/security.c:1348 vfs_getattr+0x26/0x3a0 fs/stat.c:157 vfs_statx+0x149/0x4d0 fs/stat.c:225 vfs_fstatat fs/stat.c:243 [inline] __do_sys_newfstatat fs/stat.c:411 [inline] __se_sys_newfstatat fs/stat.c:405 [inline] __x64_sys_newfstatat+0x12c/0x1b0 fs/stat.c:405 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1340 [inline] free_pcp_prepare mm/page_alloc.c:1391 [inline] free_unref_page_prepare+0x637/0x6c0 mm/page_alloc.c:3317 free_unref_page+0x94/0x280 mm/page_alloc.c:3396 kasan_depopulate_vmalloc_pte+0x67/0x80 mm/kasan/shadow.c:375 apply_to_pte_range mm/memory.c:2573 [inline] apply_to_pmd_range mm/memory.c:2617 [inline] apply_to_pud_range mm/memory.c:2653 [inline] apply_to_p4d_range mm/memory.c:2689 [inline] __apply_to_page_range+0x983/0xd10 mm/memory.c:2725 kasan_release_vmalloc+0x93/0xb0 mm/kasan/shadow.c:485 __purge_vmap_area_lazy+0xc6e/0x18f0 mm/vmalloc.c:1711 _vm_unmap_aliases+0x410/0x4a0 mm/vmalloc.c:2114 change_page_attr_set_clr+0x311/0xc10 arch/x86/mm/pat/set_memory.c:1740 change_page_attr_set arch/x86/mm/pat/set_memory.c:1790 [inline] set_memory_nx+0xd3/0x110 arch/x86/mm/pat/set_memory.c:1938 free_init_pages arch/x86/mm/init.c:934 [inline] free_kernel_image_pages arch/x86/mm/init.c:953 [inline] free_initmem+0x8e/0xd0 arch/x86/mm/init.c:980 kernel_init+0x23/0x1b0 init/main.c:1513 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287 Memory state around the buggy address: ffff888024b6c480: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888024b6c500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc >ffff888024b6c580: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc ^ ffff888024b6c600: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888024b6c680: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================