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BUG: KASAN: use-after-free in ntfs_attr_find+0x9db/0xb10 fs/ntfs/attrib.c:613
Read of size 4 at addr ffff888093f24e7f by task syz-executor.5/20487

CPU: 0 PID: 20487 Comm: syz-executor.5 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+0x1fc/0x2fe lib/dump_stack.c:118
 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
 kasan_report_error.cold+0x8a/0x1c7 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+0x9db/0xb10 fs/ntfs/attrib.c:613
 ntfs_attr_lookup+0x1020/0x1f90 fs/ntfs/attrib.c:1203
 ntfs_read_inode_mount+0x6fa/0x2200 fs/ntfs/inode.c:1858
 ntfs_fill_super+0xa16/0x7e10 fs/ntfs/super.c:2871
 mount_bdev+0x2fc/0x3b0 fs/super.c:1158
 mount_fs+0xa3/0x30c 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+0x113c/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+0xf9/0x620 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:00007f6a39ed2a88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f6a39ed2b20 RCX: 00000000004608aa
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f6a39ed2ae0
RBP: 00007f6a39ed2ae0 R08: 00007f6a39ed2b20 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 0000000020000200 R15: 000000002007dd00

Allocated by task 17425:
 kmem_cache_alloc+0x122/0x370 mm/slab.c:3559
 dup_fd+0x85/0xbf0 fs/file.c:280
 copy_files kernel/fork.c:1394 [inline]
 copy_process.part.0+0x1e7c/0x7f40 kernel/fork.c:1885
 copy_process kernel/fork.c:1694 [inline]
 _do_fork+0x22f/0xf30 kernel/fork.c:2207
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 15898:
 __cache_free mm/slab.c:3503 [inline]
 kmem_cache_free+0x7f/0x260 mm/slab.c:3765
 put_files_struct fs/file.c:421 [inline]
 put_files_struct+0x2c8/0x350 fs/file.c:413
 exit_files+0x7e/0xa0 fs/file.c:445
 do_exit+0xb7b/0x2b70 kernel/exit.c:882
 do_group_exit+0x125/0x310 kernel/exit.c:990
 get_signal+0x3f2/0x1f70 kernel/signal.c:2588
 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:821
 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163
 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:271 [inline]
 do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff888093f24b40
 which belongs to the cache files_cache of size 832
The buggy address is located 831 bytes inside of
 832-byte region [ffff888093f24b40, ffff888093f24e80)
The buggy address belongs to the page:
page:ffffea00024fc900 count:1 mapcount:0 mapping:ffff88813be45680 index:0xffff888093f24b40
flags: 0xfff00000000100(slab)
raw: 00fff00000000100 ffffea0002a96248 ffffea0002d35108 ffff88813be45680
raw: ffff888093f24b40 ffff888093f24000 0000000100000003 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888093f24d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888093f24d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888093f24e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                                ^
 ffff888093f24e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888093f24f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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