netlink: 'syz-executor2': attribute type 29 has an invalid length.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'.
netlink: 'syz-executor2': attribute type 29 has an invalid length.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'.
==================================================================
BUG: KMSAN: uninit-value in prefetch_freepointer mm/slub.c:276 [inline]
BUG: KMSAN: uninit-value in slab_alloc_node mm/slub.c:2713 [inline]
BUG: KMSAN: uninit-value in __kmalloc_node+0xec4/0x1220 mm/slub.c:3823
CPU: 0 PID: 4562 Comm: syz-executor7 Not tainted 4.18.0-rc8+ #34
netlink: 'syz-executor2': attribute type 29 has an invalid length.
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+0x17c/0x1c0 lib/dump_stack.c:113
 kmsan_report+0x188/0x2a0 mm/kmsan/kmsan.c:982
 __msan_warning+0x70/0xc0 mm/kmsan/kmsan_instr.c:645
 prefetch_freepointer mm/slub.c:276 [inline]
 slab_alloc_node mm/slub.c:2713 [inline]
 __kmalloc_node+0xec4/0x1220 mm/slub.c:3823
 kmalloc_node include/linux/slab.h:555 [inline]
 kvmalloc_node+0x19d/0x370 mm/util.c:423
netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'.
 kvmalloc include/linux/mm.h:576 [inline]
 xt_alloc_table_info+0xbb/0x170 net/netfilter/x_tables.c:1186
 do_replace net/ipv6/netfilter/ip6_tables.c:1145 [inline]
 do_ip6t_set_ctl+0x405/0x930 net/ipv6/netfilter/ip6_tables.c:1684
netlink: 'syz-executor2': attribute type 29 has an invalid length.
 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
 nf_setsockopt+0x47c/0x4e0 net/netfilter/nf_sockopt.c:115
 ipv6_setsockopt+0x1e2/0x350 net/ipv6/ipv6_sockglue.c:939
 tcp_setsockopt+0x1c0/0x1f0 net/ipv4/tcp.c:3065
netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'.
 sock_common_setsockopt+0x13b/0x170 net/core/sock.c:3040
 __sys_setsockopt+0x496/0x540 net/socket.c:1912
 __do_sys_setsockopt net/socket.c:1923 [inline]
 __se_sys_setsockopt net/socket.c:1920 [inline]
 __x64_sys_setsockopt+0x15c/0x1c0 net/socket.c:1920
 do_syscall_64+0x15b/0x220 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x459b9a
Code: 49 89 ca b8 37 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 da 89 fb ff c3 66 0f 1f 84 00 00 00 00 00 49 89 ca b8 36 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 ba 89 fb ff c3 66 0f 1f 84 00 00 00 00 00 
RSP: 002b:0000000000a3f638 EFLAGS: 00000202 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000a3f660 RCX: 0000000000459b9a
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003
RBP: 0000000000708ca0 R08: 00000000000003b8 R09: 0000000000004000
R10: 0000000000706b40 R11: 0000000000000202 R12: 0000000000000003
R13: 0000000000000000 R14: 0000000000000029 R15: 0000000000706ae0

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:256 [inline]
 kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:181
 kmsan_kmalloc+0x98/0x100 mm/kmsan/kmsan_hooks.c:91
 kmsan_slab_alloc+0x10/0x20 mm/kmsan/kmsan_hooks.c:100
 slab_post_alloc_hook mm/slab.h:446 [inline]
 slab_alloc_node mm/slub.c:2720 [inline]
 __kmalloc_node_track_caller+0xb4c/0x11d0 mm/slub.c:4353
 __kmalloc_reserve net/core/skbuff.c:138 [inline]
 __alloc_skb+0x2ce/0x9b0 net/core/skbuff.c:206
 alloc_skb include/linux/skbuff.h:988 [inline]
 __tcp_send_ack+0x10a/0x830 net/ipv4/tcp_output.c:3597
 tcp_send_ack+0x68/0x90 net/ipv4/tcp_output.c:3624
 tcp_delack_timer_handler+0x5b3/0xaa0 net/ipv4/tcp_timer.c:276
 tcp_delack_timer+0x1a4/0x340 net/ipv4/tcp_timer.c:303
 call_timer_fn+0x270/0x5c0 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers+0xd74/0x1170 kernel/time/timer.c:1666
 run_timer_softirq+0x43/0x70 kernel/time/timer.c:1692
 __do_softirq+0x582/0x969 kernel/softirq.c:292
==================================================================