IPVS: length: 254 != 8
IPVS: length: 254 != 8
==================================================================
BUG: KMSAN: uninit-value in copyout lib/iov_iter.c:140 [inline]
BUG: KMSAN: uninit-value in _copy_to_iter+0x45f/0x2800 lib/iov_iter.c:571
CPU: 1 PID: 9669 Comm: syz-executor4 Not tainted 4.17.0-rc5+ #103
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+0x185/0x1d0 lib/dump_stack.c:113
 kmsan_report+0x149/0x260 mm/kmsan/kmsan.c:1084
 kmsan_internal_check_memory+0x135/0x1e0 mm/kmsan/kmsan.c:1177
 kmsan_copy_to_user+0x75/0x160 mm/kmsan/kmsan.c:1219
 copyout lib/iov_iter.c:140 [inline]
 _copy_to_iter+0x45f/0x2800 lib/iov_iter.c:571
 copy_to_iter include/linux/uio.h:106 [inline]
 skb_copy_datagram_iter+0x443/0xf70 net/core/datagram.c:431
 skb_copy_datagram_msg include/linux/skbuff.h:3268 [inline]
 netlink_recvmsg+0x6f1/0x1900 net/netlink/af_netlink.c:1959
 sock_recvmsg_nosec net/socket.c:802 [inline]
 sock_recvmsg net/socket.c:809 [inline]
 sock_read_iter+0x405/0x480 net/socket.c:886
 call_read_iter include/linux/fs.h:1778 [inline]
 new_sync_read fs/read_write.c:406 [inline]
 __vfs_read+0x7dd/0x9b0 fs/read_write.c:418
 vfs_read+0x36c/0x6b0 fs/read_write.c:452
 ksys_read fs/read_write.c:578 [inline]
 __do_sys_read fs/read_write.c:588 [inline]
 __se_sys_read fs/read_write.c:586 [inline]
 __x64_sys_read+0x1bf/0x3e0 fs/read_write.c:586
 do_syscall_64+0x152/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x455a09
RSP: 002b:00007fc3d2f56c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fc3d2f576d4 RCX: 0000000000455a09
RDX: 0000000000001000 RSI: 00000000200002c0 RDI: 0000000000000014
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000566 R14: 00000000006fd230 R15: 0000000000000000

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:279 [inline]
 kmsan_save_stack mm/kmsan/kmsan.c:294 [inline]
 kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:685
 kmsan_memcpy_origins+0x11d/0x170 mm/kmsan/kmsan.c:527
 __msan_memcpy+0x109/0x160 mm/kmsan/kmsan_instr.c:478
 __nla_put lib/nlattr.c:569 [inline]
 nla_put+0x276/0x340 lib/nlattr.c:627
 copy_to_user_policy_type net/xfrm/xfrm_user.c:1678 [inline]
 build_acquire net/xfrm/xfrm_user.c:2850 [inline]
 xfrm_send_acquire+0x1068/0x1690 net/xfrm/xfrm_user.c:2873
 km_query net/xfrm/xfrm_state.c:1953 [inline]
 xfrm_state_find+0x3aae/0x4f70 net/xfrm/xfrm_state.c:1021
 xfrm_tmpl_resolve_one net/xfrm/xfrm_policy.c:1393 [inline]
 xfrm_tmpl_resolve net/xfrm/xfrm_policy.c:1437 [inline]
 xfrm_resolve_and_create_bundle+0xc31/0x5270 net/xfrm/xfrm_policy.c:1833
 xfrm_lookup+0x606/0x39e0 net/xfrm/xfrm_policy.c:2163
 xfrm_lookup_route+0xfa/0x360 net/xfrm/xfrm_policy.c:2283
 ip_route_output_flow+0x35b/0x3b0 net/ipv4/route.c:2563
 ip_route_connect include/net/route.h:309 [inline]
 __ip4_datagram_connect+0xcef/0x1530 net/ipv4/datagram.c:51
 __ip6_datagram_connect+0x223/0x1a20 net/ipv6/datagram.c:152
 ip6_datagram_connect net/ipv6/datagram.c:273 [inline]
 ip6_datagram_connect_v6_only+0x102/0x180 net/ipv6/datagram.c:285
 inet_dgram_connect+0x40c/0x670 net/ipv4/af_inet.c:571
 __sys_connect+0x41a/0x510 net/socket.c:1665
 __do_sys_connect net/socket.c:1676 [inline]
 __se_sys_connect net/socket.c:1673 [inline]
 __x64_sys_connect+0xd8/0x120 net/socket.c:1673
 do_syscall_64+0x152/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
Local variable description: ----upt.i.i@xfrm_send_acquire
Variable was created at:
 xfrm_send_acquire+0x73/0x1690 net/xfrm/xfrm_user.c:2864
 km_query net/xfrm/xfrm_state.c:1953 [inline]
 xfrm_state_find+0x3aae/0x4f70 net/xfrm/xfrm_state.c:1021

Byte 369 of 376 is uninitialized
Memory access starts at ffff8801cd977400
==================================================================