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BUG: KMSAN: uninit-value in slab_alloc_node mm/slub.c:2705 [inline]
BUG: KMSAN: uninit-value in __kmalloc_node+0xb2d/0x1220 mm/slub.c:3823
CPU: 0 PID: 10793 Comm: syz-executor5 Not tainted 4.18.0-rc8+ #34
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
 slab_alloc_node mm/slub.c:2705 [inline]
 __kmalloc_node+0xb2d/0x1220 mm/slub.c:3823
 kmalloc_node include/linux/slab.h:555 [inline]
 kzalloc_node include/linux/slab.h:718 [inline]
 __get_vm_area_node+0x27b/0x790 mm/vmalloc.c:1390
 __vmalloc_node_range+0x32a/0x1140 mm/vmalloc.c:1749
 __vmalloc_node mm/vmalloc.c:1799 [inline]
 __vmalloc_node_flags mm/vmalloc.c:1813 [inline]
 vmalloc+0xd8/0xf0 mm/vmalloc.c:1835
 netlink_alloc_large_skb net/netlink/af_netlink.c:1194 [inline]
 netlink_sendmsg+0xc9e/0x1350 net/netlink/af_netlink.c:1883
 sock_sendmsg_nosec net/socket.c:642 [inline]
 sock_sendmsg net/socket.c:652 [inline]
 kernel_sendmsg+0x22a/0x2d0 net/socket.c:660
 sock_no_sendpage+0x1bd/0x250 net/core/sock.c:2643
 kernel_sendpage net/socket.c:3334 [inline]
 sock_sendpage+0x1ef/0x2e0 net/socket.c:867
 pipe_to_sendpage+0x31d/0x430 fs/splice.c:452
 splice_from_pipe_feed fs/splice.c:503 [inline]
 __splice_from_pipe+0x49f/0xf30 fs/splice.c:627
 splice_from_pipe fs/splice.c:662 [inline]
 generic_splice_sendpage+0x1c2/0x2a0 fs/splice.c:833
 do_splice_from fs/splice.c:852 [inline]
 direct_splice_actor+0x19e/0x200 fs/splice.c:1019
 splice_direct_to_actor+0x746/0xfb0 fs/splice.c:974
 do_splice_direct+0x332/0x540 fs/splice.c:1062
 do_sendfile+0x1090/0x1df0 fs/read_write.c:1440
 __do_sys_sendfile64 fs/read_write.c:1495 [inline]
 __se_sys_sendfile64+0x1c2/0x380 fs/read_write.c:1487
 __x64_sys_sendfile64+0x11e/0x170 fs/read_write.c:1487
 do_syscall_64+0x15b/0x220 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x457089
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:00007fe6d034bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fe6d034c6d4 RCX: 0000000000457089
RDX: 0000000020000040 RSI: 0000000000000006 RDI: 0000000000000003
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000fffffffd R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d3d80 R14: 00000000004c87e4 R15: 0000000000000000

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
 __kmalloc+0x13a/0x350 mm/slub.c:3782
 kmalloc include/linux/slab.h:518 [inline]
 tipc_topsrv_queue_evt+0x49f/0x970 net/tipc/topsrv.c:333
 tipc_sub_send_event net/tipc/subscr.c:54 [inline]
 tipc_sub_timeout+0x28f/0x400 net/tipc/subscr.c:109
 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
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