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BUG: KASAN: slab-out-of-bounds in memcmp lib/string.c:765 [inline]
BUG: KASAN: slab-out-of-bounds in bcmp+0xbe/0x1e0 lib/string.c:797
Read of size 8 at addr ffff88803cbfa518 by task syz-executor.2/16436

CPU: 0 PID: 16436 Comm: syz-executor.2 Not tainted 6.1.0-rc2-syzkaller-00105-gb229b6ca5abb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106
 print_address_description+0x74/0x340 mm/kasan/report.c:284
 print_report+0x107/0x1f0 mm/kasan/report.c:395
 kasan_report+0xcd/0x100 mm/kasan/report.c:495
 memcmp lib/string.c:765 [inline]
 bcmp+0xbe/0x1e0 lib/string.c:797
 _Z6memcmpPKvU17pass_object_size0S0_U17pass_object_size0m include/linux/fortify-string.h:531 [inline]
 ntfs_read_mft fs/ntfs3/inode.c:253 [inline]
 ntfs_iget5+0x1101/0x36f0 fs/ntfs3/inode.c:501
 ntfs_extend_init+0x13d/0x5a0 fs/ntfs3/fsntfs.c:199
 ntfs_fill_super+0x3f20/0x42a0 fs/ntfs3/super.c:1243
 get_tree_bdev+0x400/0x620 fs/super.c:1323
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x289/0xad0 fs/namespace.c:3040
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7febfcc8cada
Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007febfd9cdf88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007febfcc8cada
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007febfd9cdfe0
RBP: 00007febfd9ce020 R08: 00007febfd9ce020 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 00007febfd9cdfe0 R15: 0000000020000140
 </TASK>

Allocated by task 16436:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x3d/0x60 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:371 [inline]
 __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:380
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slab_common.c:955 [inline]
 __kmalloc+0xaf/0x1a0 mm/slab_common.c:968
 kmalloc include/linux/slab.h:581 [inline]
 mi_init+0x72/0xe0 fs/ntfs3/record.c:105
 ntfs_read_mft fs/ntfs3/inode.c:53 [inline]
 ntfs_iget5+0x309/0x36f0 fs/ntfs3/inode.c:501
 ntfs_extend_init+0x13d/0x5a0 fs/ntfs3/fsntfs.c:199
 ntfs_fill_super+0x3f20/0x42a0 fs/ntfs3/super.c:1243
 get_tree_bdev+0x400/0x620 fs/super.c:1323
 vfs_get_tree+0x88/0x270 fs/super.c:1530
 do_new_mount+0x289/0xad0 fs/namespace.c:3040
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x2d3/0x3c0 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff88803cbfa000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 280 bytes to the right of
 1024-byte region [ffff88803cbfa000, ffff88803cbfa400)

The buggy address belongs to the physical page:
page:ffffea0000f2fe00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x3cbf8
head:ffffea0000f2fe00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000010200 ffffea0001ec4400 dead000000000002 ffff888012041dc0
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2a20(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3642, tgid 3642 (syz-executor.4), ts 171364487438, free_ts 0
 prep_new_page mm/page_alloc.c:2538 [inline]
 get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4287
 __alloc_pages+0x259/0x560 mm/page_alloc.c:5554
 alloc_slab_page+0x70/0xf0 mm/slub.c:1794
 allocate_slab+0x5e/0x4b0 mm/slub.c:1939
 new_slab mm/slub.c:1992 [inline]
 ___slab_alloc+0x782/0xe20 mm/slub.c:3180
 __slab_alloc mm/slub.c:3279 [inline]
 slab_alloc_node mm/slub.c:3364 [inline]
 __kmem_cache_alloc_node+0x252/0x310 mm/slub.c:3437
 __do_kmalloc_node mm/slab_common.c:954 [inline]
 __kmalloc_node_track_caller+0x9c/0x1a0 mm/slab_common.c:975
 kmalloc_reserve net/core/skbuff.c:437 [inline]
 __alloc_skb+0x112/0x2b0 net/core/skbuff.c:509
 alloc_skb include/linux/skbuff.h:1267 [inline]
 nlmsg_new include/net/netlink.h:964 [inline]
 inet6_rt_notify+0x2c9/0x5a0 net/ipv6/route.c:6172
 fib6_add_rt2node net/ipv6/ip6_fib.c:1252 [inline]
 fib6_add+0x1e90/0x3c70 net/ipv6/ip6_fib.c:1478
 __ip6_ins_rt net/ipv6/route.c:1302 [inline]
 ip6_route_add+0x84/0x120 net/ipv6/route.c:3847
 addrconf_prefix_route+0x3fd/0x5c0 net/ipv6/addrconf.c:2425
 inet6_addr_add+0x541/0xa00 net/ipv6/addrconf.c:2972
 inet6_rtm_newaddr+0x88e/0x2080 net/ipv6/addrconf.c:4927
 rtnetlink_rcv_msg+0x772/0xe60 net/core/rtnetlink.c:6091
 netlink_rcv_skb+0x1f0/0x460 net/netlink/af_netlink.c:2540
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88803cbfa400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88803cbfa480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88803cbfa500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                            ^
 ffff88803cbfa580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88803cbfa600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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