syzbot

ntfs: volume version 3.1.
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BUG: KASAN: slab-out-of-bounds in ntfs_filldir fs/ntfs/dir.c:1021 [inline]
BUG: KASAN: slab-out-of-bounds in ntfs_readdir+0x15a0/0x2e40 fs/ntfs/dir.c:1200
Read of size 1 at addr ffff88801ee7fff1 by task syz-executor188/5065

CPU: 0 PID: 5065 Comm: syz-executor188 Not tainted 6.7.0-rc8-syzkaller-00174-g95c8a35f1c01 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:364 [inline]
 print_report+0xc4/0x620 mm/kasan/report.c:475
 kasan_report+0xda/0x110 mm/kasan/report.c:588
 ntfs_filldir fs/ntfs/dir.c:1021 [inline]
 ntfs_readdir+0x15a0/0x2e40 fs/ntfs/dir.c:1200
 wrap_directory_iterator+0xa5/0xe0 fs/readdir.c:67
 iterate_dir+0x1e5/0x5b0 fs/readdir.c:106
 __do_sys_getdents64 fs/readdir.c:405 [inline]
 __se_sys_getdents64 fs/readdir.c:390 [inline]
 __x64_sys_getdents64+0x14f/0x2e0 fs/readdir.c:390
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f00b3e2e5f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffca876478 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007fffca876648 RCX: 00007f00b3e2e5f9
RDX: 00000000000000ab RSI: 0000000020000080 RDI: 0000000000000004
RBP: 00007f00b3ec0610 R08: 0000000000000000 R09: 00007fffca876648
R10: 000000000001f1b8 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fffca876638 R14: 0000000000000001 R15: 0000000000000001
 </TASK>

Allocated by task 5065:
 kasan_save_stack+0x33/0x50 mm/kasan/common.c:45
 kasan_set_track+0x25/0x30 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0xa3/0xb0 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:198 [inline]
 __do_kmalloc_node mm/slab_common.c:1007 [inline]
 __kmalloc+0x59/0x90 mm/slab_common.c:1020
 kmalloc include/linux/slab.h:604 [inline]
 ntfs_readdir+0x12ef/0x2e40 fs/ntfs/dir.c:1162
 wrap_directory_iterator+0xa5/0xe0 fs/readdir.c:67
 iterate_dir+0x1e5/0x5b0 fs/readdir.c:106
 __do_sys_getdents64 fs/readdir.c:405 [inline]
 __se_sys_getdents64 fs/readdir.c:390 [inline]
 __x64_sys_getdents64+0x14f/0x2e0 fs/readdir.c:390
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x63/0x6b

The buggy address belongs to the object at ffff88801ee7ff80
 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 [ffff88801ee7ff80, ffff88801ee7ffb8)

The buggy address belongs to the physical page:
page:ffffea00007b9fc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801ee7f800 pfn:0x1ee7f
flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0x19()
raw: 00fff00000000800 ffff888013040200 ffffea0000760210 ffffea0000719c50
raw: ffff88801ee7f800 ffff88801ee7f000 0000000100000019 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 0x2420c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_COMP|__GFP_THISNODE), pid 47, tgid 47 (kworker/u4:3), ts 9199549064, free_ts 0
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2d0/0x350 mm/page_alloc.c:1537
 prep_new_page mm/page_alloc.c:1544 [inline]
 get_page_from_freelist+0xa25/0x36d0 mm/page_alloc.c:3312
 __alloc_pages+0x22e/0x2420 mm/page_alloc.c:4568
 __alloc_pages_node include/linux/gfp.h:238 [inline]
 kmem_getpages mm/slab.c:1356 [inline]
 cache_grow_begin+0x99/0x3a0 mm/slab.c:2550
 cache_alloc_refill+0x295/0x3b0 mm/slab.c:2923
 ____cache_alloc mm/slab.c:2999 [inline]
 ____cache_alloc mm/slab.c:2982 [inline]
 __do_cache_alloc mm/slab.c:3182 [inline]
 slab_alloc_node mm/slab.c:3230 [inline]
 __kmem_cache_alloc_node+0x3ba/0x460 mm/slab.c:3521
 __do_kmalloc_node mm/slab_common.c:1006 [inline]
 __kmalloc_node+0x4c/0x90 mm/slab_common.c:1014
 kmalloc_node include/linux/slab.h:620 [inline]
 __vmalloc_area_node mm/vmalloc.c:3125 [inline]
 __vmalloc_node_range+0x3e9/0x1540 mm/vmalloc.c:3320
 alloc_thread_stack_node kernel/fork.c:309 [inline]
 dup_task_struct kernel/fork.c:1118 [inline]
 copy_process+0x138b/0x73f0 kernel/fork.c:2332
 kernel_clone+0xfd/0x930 kernel/fork.c:2907
 user_mode_thread+0xb4/0xf0 kernel/fork.c:2985
 call_usermodehelper_exec_work kernel/umh.c:172 [inline]
 call_usermodehelper_exec_work+0xcb/0x170 kernel/umh.c:158
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2627
 process_scheduled_works kernel/workqueue.c:2700 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88801ee7fe80: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
 ffff88801ee7ff00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
>ffff88801ee7ff80: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc
                                                             ^
 ffff88801ee80000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88801ee80080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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