IPVS: nq: TCP 172.20.20.170:20003 - no destination available
netlink: 64 bytes leftover after parsing attributes in process `syz-executor1'.
==================================================================
BUG: KASAN: slab-out-of-bounds in memcpy include/linux/string.h:345 [inline]
BUG: KASAN: slab-out-of-bounds in dh_pack_data crypto/dh_helper.c:21 [inline]
BUG: KASAN: slab-out-of-bounds in crypto_dh_encode_key+0x670/0x830 crypto/dh_helper.c:64
netlink: 64 bytes leftover after parsing attributes in process `syz-executor1'.
Write of size 4096 at addr ffff8801af6c4754 by task syz-executor2/8875

CPU: 0 PID: 8875 Comm: syz-executor2 Not tainted 4.18.0-rc7-next-20180803+ #31
IPVS: nq: TCP 172.20.20.170:20003 - no destination available
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+0x1c9/0x2b4 lib/dump_stack.c:113
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0x242/0x30d mm/kasan/report.c:412
 check_memory_region_inline mm/kasan/kasan.c:260 [inline]
 check_memory_region+0x13e/0x1b0 mm/kasan/kasan.c:267
 memcpy+0x37/0x50 mm/kasan/kasan.c:303
 memcpy include/linux/string.h:345 [inline]
 dh_pack_data crypto/dh_helper.c:21 [inline]
 crypto_dh_encode_key+0x670/0x830 crypto/dh_helper.c:64
 __keyctl_dh_compute+0x707/0x1c00 security/keys/dh.c:316
 keyctl_dh_compute+0xc5/0x11f security/keys/dh.c:427
 __do_sys_keyctl security/keys/keyctl.c:1741 [inline]
 __se_sys_keyctl security/keys/keyctl.c:1637 [inline]
 __x64_sys_keyctl+0x12a/0x3b0 security/keys/keyctl.c:1637
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x456b29
Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ff0302b8c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000fa
RAX: ffffffffffffffda RBX: 00007ff0302b96d4 RCX: 0000000000456b29
RDX: 0000000020001300 RSI: 00000000200012c0 RDI: 0000000000000017
RBP: 00000000009300a0 R08: 0000000020001480 R09: 0000000000000000
R10: 00000000000000e8 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d16a0 R14: 00000000004c7069 R15: 0000000000000000

Allocated by task 8875:
 save_stack+0x43/0xd0 mm/kasan/kasan.c:448
 set_track mm/kasan/kasan.c:460 [inline]
 kasan_kmalloc+0xc4/0xe0 mm/kasan/kasan.c:553
 __do_kmalloc mm/slab.c:3718 [inline]
 __kmalloc+0x14e/0x760 mm/slab.c:3727
 kmalloc include/linux/slab.h:518 [inline]
 __keyctl_dh_compute+0x6e1/0x1c00 security/keys/dh.c:311
 keyctl_dh_compute+0xc5/0x11f security/keys/dh.c:427
 __do_sys_keyctl security/keys/keyctl.c:1741 [inline]
 __se_sys_keyctl security/keys/keyctl.c:1637 [inline]
 __x64_sys_keyctl+0x12a/0x3b0 security/keys/keyctl.c:1637
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff8801af6c2740
 which belongs to the cache kmalloc-16384 of size 16384
The buggy address is located 8212 bytes inside of
 16384-byte region [ffff8801af6c2740, ffff8801af6c6740)
The buggy address belongs to the page:
page:ffffea0006bdb000 count:1 mapcount:0 mapping:ffff8801dac02200 index:0x0 compound_mapcount: 0
flags: 0x2fffc0000008100(slab|head)
raw: 02fffc0000008100 ffffea000716ec08 ffff8801dac01c48 ffff8801dac02200
raw: 0000000000000000 ffff8801af6c2740 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8801af6c5600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801af6c5680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801af6c5700: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
                                                 ^
 ffff8801af6c5780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8801af6c5800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================