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 loop2): is_boot_sector_ntfs(): Invalid end of sector marker.
==================================================================
BUG: KASAN: use-after-free in ntfs_attr_find+0xa45/0xb70 fs/ntfs/attrib.c:599
Read of size 4 at addr ffff8881c885ad35 by task syz-executor2/3729
ntfs: (device loop1): is_boot_sector_ntfs(): Invalid end of sector marker.

CPU: 0 PID: 3729 Comm: syz-executor2 Not tainted 5.8.0-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+0x136/0x187 lib/dump_stack.c:118
 print_address_description.constprop.9+0x3f/0x60 mm/kasan/report.c:383
 __kasan_report mm/kasan/report.c:513 [inline]
 kasan_report.cold.12+0x20/0x37 mm/kasan/report.c:530
 __asan_report_load_n_noabort+0xf/0x20 mm/kasan/generic_report.c:156
 ntfs_attr_find+0xa45/0xb70 fs/ntfs/attrib.c:599
 ntfs_external_attr_find fs/ntfs/attrib.c:1093 [inline]
 ntfs_attr_lookup+0x10c9/0x2390 fs/ntfs/attrib.c:1191
 ntfs_read_inode_mount+0x6c2/0x2140 fs/ntfs/inode.c:1832
 ntfs_fill_super+0x1296/0x2e60 fs/ntfs/super.c:2857
 mount_bdev+0x27b/0x340 fs/super.c:1417
 ntfs_mount+0x10/0x20 fs/ntfs/super.c:3051
 legacy_get_tree+0x103/0x1f0 fs/fs_context.c:592
 vfs_get_tree+0x8b/0x2d0 fs/super.c:1547
 do_new_mount fs/namespace.c:2874 [inline]
 do_mount+0x1293/0x1c40 fs/namespace.c:3199
 __do_sys_mount fs/namespace.c:3409 [inline]
 __se_sys_mount fs/namespace.c:3386 [inline]
 __x64_sys_mount+0x169/0x1c0 fs/namespace.c:3386
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x457dea
Code: Bad RIP value.
RSP: 002b:00007faa1b304bb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 0000000000457dea
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007faa1b304c00
RBP: 0000000000000002 R08: 000000002007e200 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 000000000000066c R14: 00000000006fbac0 R15: 0000000000000000

Allocated by task 2091:
 save_stack+0x21/0x50 mm/kasan/common.c:48
 set_track mm/kasan/common.c:56 [inline]
 __kasan_kmalloc.constprop.8+0xc1/0xd0 mm/kasan/common.c:494
 kasan_slab_alloc+0x12/0x20 mm/kasan/common.c:502
 slab_post_alloc_hook mm/slab.h:586 [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:2646
 user_path_at include/linux/namei.h:59 [inline]
 vfs_statx+0xfc/0x2e0 fs/stat.c:202
 vfs_lstat include/linux/fs.h:3303 [inline]
 __do_sys_newlstat+0x85/0xe0 fs/stat.c:374
 __se_sys_newlstat fs/stat.c:368 [inline]
 __x64_sys_newlstat+0x4f/0x70 fs/stat.c:368
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Freed by task 2091:
 save_stack+0x21/0x50 mm/kasan/common.c:48
 set_track mm/kasan/common.c:56 [inline]
 kasan_set_free_info mm/kasan/common.c:316 [inline]
 __kasan_slab_free+0x11a/0x170 mm/kasan/common.c:455
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:464
 __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.56+0x1e3/0x350 fs/namei.c:2376
 filename_lookup fs/namei.c:2359 [inline]
 user_path_at_empty+0x39/0x40 fs/namei.c:2646
 user_path_at include/linux/namei.h:59 [inline]
 vfs_statx+0xfc/0x2e0 fs/stat.c:202
 vfs_lstat include/linux/fs.h:3303 [inline]
 __do_sys_newlstat+0x85/0xe0 fs/stat.c:374
 __se_sys_newlstat fs/stat.c:368 [inline]
 __x64_sys_newlstat+0x4f/0x70 fs/stat.c:368
 do_syscall_64+0x6e/0xf0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

The buggy address belongs to the object at ffff8881c885a680
 which belongs to the cache names_cache of size 4096
The buggy address is located 1717 bytes inside of
 4096-byte region [ffff8881c885a680, ffff8881c885b680)
The buggy address belongs to the page:
page:ffffea0007221680 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 head:ffffea0007221680 order:1 compound_mapcount:0
flags: 0x2fffc0000010200(slab|head)
raw: 02fffc0000010200 ffffea0007221408 ffffea000724dd08 ffff8881da1a1a80
raw: 0000000000000000 ffff8881c885a680 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881c885ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881c885ac80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff8881c885ad00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff8881c885ad80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881c885ae00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================