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BUG: KASAN: slab-out-of-bounds in ntfs_attr_find+0xb48/0xc20 fs/ntfs/attrib.c:611
Read of size 2 at addr ffff88809573e608 by task syz-executor.4/9976

CPU: 0 PID: 9976 Comm: syz-executor.4 Not tainted 4.14.294-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351
 kasan_report mm/kasan/report.c:409 [inline]
 __asan_report_load_n_noabort+0x6b/0x80 mm/kasan/report.c:440
 ntfs_attr_find+0xb48/0xc20 fs/ntfs/attrib.c:611
 ntfs_attr_lookup+0xeca/0x1f30 fs/ntfs/attrib.c:1207
 ntfs_read_inode_mount+0x726/0x2060 fs/ntfs/inode.c:1879
 ntfs_fill_super+0x9a6/0x7170 fs/ntfs/super.c:2871
 mount_bdev+0x2b3/0x360 fs/super.c:1134
 mount_fs+0x92/0x2a0 fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2572 [inline]
 do_mount+0xe65/0x2a30 fs/namespace.c:2905
 SYSC_mount fs/namespace.c:3121 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3098
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f514685093a
RSP: 002b:00007f51451c3f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f514685093a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f51451c3fe0
RBP: 00007f51451c4020 R08: 00007f51451c4020 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f51451c3fe0 R15: 0000000020079ca0

Allocated by task 4634:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
 kmem_cache_alloc+0x124/0x3c0 mm/slab.c:3552
 getname_flags+0xc8/0x550 fs/namei.c:138
 user_path_at_empty+0x2a/0x50 fs/namei.c:2631
 user_path_at include/linux/namei.h:57 [inline]
 vfs_statx+0xd1/0x180 fs/stat.c:185
 vfs_lstat include/linux/fs.h:3072 [inline]
 SYSC_newlstat fs/stat.c:349 [inline]
 SyS_newlstat+0x83/0xe0 fs/stat.c:343
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb

Freed by task 4634:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kmem_cache_free+0x7c/0x2b0 mm/slab.c:3758
 putname+0xcd/0x110 fs/namei.c:259
 filename_lookup+0x37b/0x510 fs/namei.c:2386
 user_path_at include/linux/namei.h:57 [inline]
 vfs_statx+0xd1/0x180 fs/stat.c:185
 vfs_lstat include/linux/fs.h:3072 [inline]
 SYSC_newlstat fs/stat.c:349 [inline]
 SyS_newlstat+0x83/0xe0 fs/stat.c:343
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb

The buggy address belongs to the object at ffff88809573ed00
 which belongs to the cache names_cache of size 4096
The buggy address is located 1784 bytes to the left of
 4096-byte region [ffff88809573ed00, ffff88809573fd00)
The buggy address belongs to the page:
page:ffffea000255cf80 count:1 mapcount:0 mapping:ffff88809573ed00 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffff88809573ed00 0000000000000000 0000000100000001
raw: ffffea000255cf20 ffffea00025d0020 ffff88823f8c1200 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809573e500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88809573e580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88809573e600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                      ^
 ffff88809573e680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88809573e700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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