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BUG: KASAN: slab-out-of-bounds in ntfs_attr_find+0xa42/0xb70 fs/ntfs/attrib.c:613
Read of size 4 at addr ffff88805693dfff by task syz-executor.4/25295

CPU: 0 PID: 25295 Comm: syz-executor.4 Not tainted 4.19.152-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x22c/0x33e lib/dump_stack.c:118
 print_address_description.cold+0x56/0x25c mm/kasan/report.c:256
 kasan_report_error.cold+0x66/0xb9 mm/kasan/report.c:354
 kasan_report mm/kasan/report.c:412 [inline]
 __asan_report_load_n_noabort+0x8b/0xa0 mm/kasan/report.c:443
 ntfs_attr_find+0xa42/0xb70 fs/ntfs/attrib.c:613
 ntfs_attr_lookup+0x1087/0x2060 fs/ntfs/attrib.c:1203
 ntfs_read_inode_mount+0x7e4/0x23b0 fs/ntfs/inode.c:1858
 ntfs_fill_super+0x1761/0x89d2 fs/ntfs/super.c:2871
 mount_bdev+0x2fc/0x3b0 fs/super.c:1158
 mount_fs+0xa3/0x318 fs/super.c:1261
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2469 [inline]
 do_mount+0x51c/0x2f10 fs/namespace.c:2799
 ksys_mount+0xcf/0x130 fs/namespace.c:3015
 __do_sys_mount fs/namespace.c:3029 [inline]
 __se_sys_mount fs/namespace.c:3026 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3026
 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x4608aa
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 ad 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 8a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007f27fb0b2a88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f27fb0b2b20 RCX: 00000000004608aa
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f27fb0b2ae0
RBP: 00007f27fb0b2ae0 R08: 00007f27fb0b2b20 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 0000000020000200 R15: 000000002007dc00

Allocated by task 18605:
 kmem_cache_alloc+0x126/0x490 mm/slab.c:3559
 getname_flags+0xce/0x590 fs/namei.c:140
 user_path_at_empty+0x2a/0x50 fs/namei.c:2609
 user_path_at include/linux/namei.h:57 [inline]
 inotify_find_inode fs/notify/inotify/inotify_user.c:349 [inline]
 __do_sys_inotify_add_watch fs/notify/inotify/inotify_user.c:746 [inline]
 __se_sys_inotify_add_watch+0x193/0x880 fs/notify/inotify/inotify_user.c:699
 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 18605:
 __cache_free mm/slab.c:3503 [inline]
 kmem_cache_free+0x7f/0x2b0 mm/slab.c:3765
 putname+0xe1/0x130 fs/namei.c:261
 filename_lookup+0x3d0/0x5a0 fs/namei.c:2358
 user_path_at include/linux/namei.h:57 [inline]
 inotify_find_inode fs/notify/inotify/inotify_user.c:349 [inline]
 __do_sys_inotify_add_watch fs/notify/inotify/inotify_user.c:746 [inline]
 __se_sys_inotify_add_watch+0x193/0x880 fs/notify/inotify/inotify_user.c:699
 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff88805693c940
 which belongs to the cache names_cache of size 4096
The buggy address is located 1727 bytes to the right of
 4096-byte region [ffff88805693c940, ffff88805693d940)
The buggy address belongs to the page:
page:ffffea00015a4f00 count:1 mapcount:0 mapping:ffff88823b842b00 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffffea000283d508 ffffea00023efe88 ffff88823b842b00
raw: 0000000000000000 ffff88805693c940 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88805693de80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88805693df00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88805693df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                                                ^
 ffff88805693e000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88805693e080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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