IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
ntfs: (device loop4): is_boot_sector_ntfs(): Invalid end of sector marker.
==================================================================
BUG: KASAN: use-after-free in ntfs_attr_find+0x9df/0xb00 fs/ntfs/attrib.c:599
Read of size 4 at addr ffff8881bee7ad35 by task syz-executor4/4445

CPU: 0 PID: 4445 Comm: syz-executor4 Not tainted 5.5.0-rc1-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+0x12f/0x187 lib/dump_stack.c:118
 print_address_description.constprop.8+0x3b/0x60 mm/kasan/report.c:374
 __kasan_report.cold.11+0x1b/0x39 mm/kasan/report.c:506
 kasan_report+0x12/0x20 mm/kasan/common.c:639
 __asan_report_load_n_noabort+0xf/0x20 mm/kasan/generic_report.c:145
 ntfs_attr_find+0x9df/0xb00 fs/ntfs/attrib.c:599
 ntfs_external_attr_find fs/ntfs/attrib.c:1093 [inline]
 ntfs_attr_lookup+0x10c9/0x23c0 fs/ntfs/attrib.c:1191
 ntfs_read_inode_mount+0x6bf/0x20c0 fs/ntfs/inode.c:1832
 ntfs_fill_super+0x121e/0x2d50 fs/ntfs/super.c:2857
 mount_bdev+0x27b/0x340 fs/super.c:1415
 ntfs_mount+0x10/0x20 fs/ntfs/super.c:3051
 legacy_get_tree+0x103/0x1f0 fs/fs_context.c:647
 vfs_get_tree+0x8b/0x2d0 fs/super.c:1545
 do_new_mount fs/namespace.c:2822 [inline]
 do_mount+0x1285/0x1b70 fs/namespace.c:3142
 ksys_mount+0xba/0xe0 fs/namespace.c:3351
 __do_sys_mount fs/namespace.c:3365 [inline]
 __se_sys_mount fs/namespace.c:3362 [inline]
 __x64_sys_mount+0xb9/0x150 fs/namespace.c:3362
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457dea
Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 dd 8f 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 ba 8f fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:00007fec295efbb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 0000000000457dea
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fec295efc00
RBP: 0000000000000002 R08: 000000002007e200 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 000000000000066c R14: 00000000006fbac0 R15: 0000000000000000

Allocated by task 3855:
 save_stack+0x21/0x90 mm/kasan/common.c:72
 set_track mm/kasan/common.c:80 [inline]
 __kasan_kmalloc.constprop.7+0xc1/0xd0 mm/kasan/common.c:513
 kasan_slab_alloc+0x12/0x20 mm/kasan/common.c:521
 slab_post_alloc_hook mm/slab.h:584 [inline]
 slab_alloc mm/slab.c:3320 [inline]
 kmem_cache_alloc+0x121/0x740 mm/slab.c:3484
 getname_flags+0xb8/0x510 fs/namei.c:138
 user_path_at_empty+0x1e/0x40 fs/namei.c:2615
 user_path_at include/linux/namei.h:49 [inline]
 vfs_statx+0xbe/0x150 fs/stat.c:187
 vfs_stat include/linux/fs.h:3249 [inline]
 __do_sys_newstat+0x85/0xe0 fs/stat.c:341
 __se_sys_newstat fs/stat.c:337 [inline]
 __x64_sys_newstat+0x4f/0x70 fs/stat.c:337
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 3855:
 save_stack+0x21/0x90 mm/kasan/common.c:72
 set_track mm/kasan/common.c:80 [inline]
 kasan_set_free_info mm/kasan/common.c:335 [inline]
 __kasan_slab_free+0x11a/0x170 mm/kasan/common.c:474
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:483
 __cache_free mm/slab.c:3426 [inline]
 kmem_cache_free+0x86/0x2e0 mm/slab.c:3694
 putname+0xa8/0xe0 fs/namei.c:259
 filename_lookup.part.61+0x1e8/0x330 fs/namei.c:2344
 filename_lookup fs/namei.c:2328 [inline]
 user_path_at_empty+0x39/0x40 fs/namei.c:2615
 user_path_at include/linux/namei.h:49 [inline]
 vfs_statx+0xbe/0x150 fs/stat.c:187
 vfs_stat include/linux/fs.h:3249 [inline]
 __do_sys_newstat+0x85/0xe0 fs/stat.c:341
 __se_sys_newstat fs/stat.c:337 [inline]
 __x64_sys_newstat+0x4f/0x70 fs/stat.c:337
 do_syscall_64+0xd0/0x600 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

The buggy address belongs to the object at ffff8881bee7a0c0
 which belongs to the cache names_cache of size 4096
The buggy address is located 3189 bytes inside of
 4096-byte region [ffff8881bee7a0c0, ffff8881bee7b0c0)
The buggy address belongs to the page:
page:ffffea0006fb9e80 refcount:1 mapcount:0 mapping:ffff8881da19aa80 index:0x0 compound_mapcount: 0
raw: 02fffc0000010200 ffffea0006fb9c08 ffffea0006fb8288 ffff8881da19aa80
raw: 0000000000000000 ffff8881bee7a0c0 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881bee7ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881bee7ac80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881bee7ad00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff8881bee7ad80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881bee7ae00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================