================================================================== BUG: KASAN: slab-out-of-bounds in ntfs_filldir fs/ntfs/dir.c:1021 [inline] BUG: KASAN: slab-out-of-bounds in ntfs_readdir+0xeaa/0x2b80 fs/ntfs/dir.c:1200 Read of size 1 at addr ffff8880276eb071 by task syz-executor.3/5742 CPU: 0 PID: 5742 Comm: syz-executor.3 Not tainted 6.6.0-syzkaller-15029-gbe3ca57cfb77 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x142/0x170 mm/kasan/report.c:588 ntfs_filldir fs/ntfs/dir.c:1021 [inline] ntfs_readdir+0xeaa/0x2b80 fs/ntfs/dir.c:1200 wrap_directory_iterator+0x91/0xd0 fs/readdir.c:67 iterate_dir+0x1cd/0x540 fs/readdir.c:106 __do_sys_getdents64 fs/readdir.c:405 [inline] __se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:390 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7fca86a7cae9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fca878300c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007fca86b9c050 RCX: 00007fca86a7cae9 RDX: 00000000000000f2 RSI: 0000000020000080 RDI: 0000000000000006 RBP: 00007fca86ac847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007fca86b9c050 R15: 00007ffcb740d988 Allocated by task 5742: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:198 [inline] __do_kmalloc_node mm/slab_common.c:1007 [inline] __kmalloc+0xb9/0x230 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] ntfs_readdir+0x832/0x2b80 fs/ntfs/dir.c:1162 wrap_directory_iterator+0x91/0xd0 fs/readdir.c:67 iterate_dir+0x1cd/0x540 fs/readdir.c:106 __do_sys_getdents64 fs/readdir.c:405 [inline] __se_sys_getdents64+0x20d/0x4f0 fs/readdir.c:390 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0x6b The buggy address belongs to the object at ffff8880276eb000 which belongs to the cache kmalloc-64 of size 64 The buggy address is located 57 bytes to the right of allocated 56-byte region [ffff8880276eb000, ffff8880276eb038) The buggy address belongs to the physical page: page:ffffea00009dbac0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x276eb flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000800 ffff888012c41640 ffffea00009c6200 dead000000000004 raw: ffff8880276ebf00 000000008020001e 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 0x112c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL), pid 5104, tgid 5104 (syz-executor.4), ts 193527162566, free_ts 193526079729 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1544 [inline] get_page_from_freelist+0x339a/0x3530 mm/page_alloc.c:3312 __alloc_pages+0x255/0x670 mm/page_alloc.c:4568 alloc_pages_mpol+0x3de/0x640 mm/mempolicy.c:2133 alloc_slab_page+0x6a/0x160 mm/slub.c:1870 allocate_slab mm/slub.c:2017 [inline] new_slab+0x84/0x2f0 mm/slub.c:2070 ___slab_alloc+0xc85/0x1310 mm/slub.c:3223 __slab_alloc mm/slub.c:3322 [inline] __slab_alloc_node mm/slub.c:3375 [inline] slab_alloc_node mm/slub.c:3468 [inline] __kmem_cache_alloc_node+0x21d/0x300 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc+0xa8/0x230 mm/slab_common.c:1020 kmalloc include/linux/slab.h:604 [inline] kzalloc include/linux/slab.h:721 [inline] tomoyo_encode2 security/tomoyo/realpath.c:45 [inline] tomoyo_encode+0x26f/0x530 security/tomoyo/realpath.c:80 tomoyo_realpath_from_path+0x598/0x5e0 security/tomoyo/realpath.c:283 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x2b7/0x730 security/tomoyo/file.c:822 security_inode_getattr+0xd3/0x120 security/security.c:2153 vfs_getattr+0x2a/0x3a0 fs/stat.c:169 vfs_fstat fs/stat.c:194 [inline] vfs_fstatat+0xd6/0x190 fs/stat.c:291 __do_sys_newfstatat fs/stat.c:459 [inline] __se_sys_newfstatat fs/stat.c:453 [inline] __x64_sys_newfstatat+0x117/0x190 fs/stat.c:453 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1137 [inline] free_unref_page_prepare+0x92a/0xa50 mm/page_alloc.c:2347 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2487 mm_free_pgd kernel/fork.c:803 [inline] __mmdrop+0xb8/0x3d0 kernel/fork.c:919 exit_mm+0x21f/0x300 kernel/exit.c:567 do_exit+0x9b7/0x2750 kernel/exit.c:858 do_group_exit+0x206/0x2c0 kernel/exit.c:1021 get_signal+0x1769/0x1840 kernel/signal.c:2904 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:309 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296 do_syscall_64+0x50/0x110 arch/x86/entry/common.c:88 entry_SYSCALL_64_after_hwframe+0x63/0x6b Memory state around the buggy address: ffff8880276eaf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880276eaf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8880276eb000: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc ^ ffff8880276eb080: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff8880276eb100: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================