ntfs: (device loop5): is_boot_sector_ntfs(): Invalid boot sector checksum.
ntfs: (device loop5): is_boot_sector_ntfs(): Invalid end of sector marker.
==================================================================
BUG: KASAN: use-after-free in ntfs_attr_find+0xb48/0xc20 fs/ntfs/attrib.c:611
Read of size 2 at addr ffff88803d978948 by task syz-executor.5/11295

CPU: 1 PID: 11295 Comm: syz-executor.5 Not tainted 4.14.299-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
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+0x9a6/0x7180 fs/ntfs/super.c:2872
 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+0x5e/0xd3

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
 do_sys_open+0x1ce/0x410 fs/open.c:1075
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3

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
 do_sys_open+0x203/0x410 fs/open.c:1090
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3

The buggy address belongs to the object at ffff88803d978800
 which belongs to the cache names_cache of size 4096
The buggy address is located 328 bytes inside of
 4096-byte region [ffff88803d978800, ffff88803d979800)
The buggy address belongs to the page:
page:ffffea0000f65e00 count:1 mapcount:0 mapping:ffff88803d978800 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffff88803d978800 0000000000000000 0000000100000001
raw: ffffea0000f67f20 ffffea00023ccba0 ffff88823f8c1200 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88803d978800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88803d978880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88803d978900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                              ^
 ffff88803d978980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88803d978a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1