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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: 1 PID: 9855 Comm: syz-executor3 Not tainted 4.18.0-rc8+ #33
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_caller+0x12b/0x140 mm/vmalloc.c:1821
 bpf_map_area_alloc+0x16f/0x1a0 kernel/bpf/syscall.c:152
 prealloc_init kernel/bpf/hashtab.c:146 [inline]
 htab_map_alloc+0xf34/0x1d20 kernel/bpf/hashtab.c:378
 find_and_alloc_map kernel/bpf/syscall.c:129 [inline]
 map_create kernel/bpf/syscall.c:453 [inline]
 __do_sys_bpf+0x7677/0xe570 kernel/bpf/syscall.c:2292
 __se_sys_bpf kernel/bpf/syscall.c:2269 [inline]
 __x64_sys_bpf+0xda/0x110 kernel/bpf/syscall.c:2269
 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:00007f90e64d7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f90e64d86d4 RCX: 0000000000457089
RDX: 000000000000002c RSI: 0000000020000140 RDI: 0000000000000000
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004caff0 R14: 00000000004c2f86 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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