9pnet_virtio: no channels available for device ./file0
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BUG: KMSAN: uninit-value in slab_alloc_node mm/slub.c:2722 [inline]
BUG: KMSAN: uninit-value in __kmalloc_node+0x801/0x1190 mm/slub.c:3832
CPU: 1 PID: 9061 Comm: syz-executor0 Not tainted 4.16.0+ #83
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:53
 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067
 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:676
 slab_alloc_node mm/slub.c:2722 [inline]
 __kmalloc_node+0x801/0x1190 mm/slub.c:3832
 kmalloc_node include/linux/slab.h:554 [inline]
 bpf_map_area_alloc+0xb7/0x1a0 kernel/bpf/syscall.c:139
 array_map_alloc+0x545/0xba0 kernel/bpf/arraymap.c:130
 find_and_alloc_map kernel/bpf/syscall.c:121 [inline]
 map_create kernel/bpf/syscall.c:439 [inline]
 SYSC_bpf+0x6792/0xdfd0 kernel/bpf/syscall.c:1866
 SyS_bpf+0x54/0x80 kernel/bpf/syscall.c:1843
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x455279
RSP: 002b:00007f5390bfbc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f5390bfc6d4 RCX: 0000000000455279
RDX: 000000000000001c RSI: 0000000020fe1fe4 RDI: 0000000000000000
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 000000000000003c R14: 00000000006f3640 R15: 0000000000000000

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline]
 kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:188
 kmsan_kmalloc+0x94/0x100 mm/kmsan/kmsan.c:314
 kmsan_slab_alloc+0x11/0x20 mm/kmsan/kmsan.c:321
 slab_post_alloc_hook mm/slab.h:445 [inline]
 slab_alloc_node mm/slub.c:2737 [inline]
 __kmalloc_node_track_caller+0xaed/0x11c0 mm/slub.c:4369
 __kmalloc_reserve net/core/skbuff.c:138 [inline]
 __alloc_skb+0x2cf/0x9f0 net/core/skbuff.c:206
 alloc_skb include/linux/skbuff.h:984 [inline]
 alloc_skb_with_frags+0x1d4/0xb20 net/core/skbuff.c:5234
 sock_alloc_send_pskb+0xb56/0x1190 net/core/sock.c:2085
 sock_alloc_send_skb+0xca/0xe0 net/core/sock.c:2102
 __ip6_append_data+0x3387/0x4bb0 net/ipv6/ip6_output.c:1414
 ip6_append_data+0x40e/0x6b0 net/ipv6/ip6_output.c:1576
 icmp6_send+0x2892/0x3460 net/ipv6/icmp.c:574
 icmpv6_send+0xe0/0x110 net/ipv6/ip6_icmp.c:43
 ip6_link_failure+0x8f/0x580 net/ipv6/route.c:2034
 dst_link_failure include/net/dst.h:426 [inline]
 ndisc_error_report+0x101/0x1a0 net/ipv6/ndisc.c:695
 neigh_invalidate+0x385/0x930 net/core/neighbour.c:883
 neigh_timer_handler+0xd85/0x12d0 net/core/neighbour.c:969
 call_timer_fn+0x26a/0x5a0 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers+0xda7/0x11c0 kernel/time/timer.c:1666
 run_timer_softirq+0x43/0x70 kernel/time/timer.c:1692
 __do_softirq+0x56d/0x93d kernel/softirq.c:285
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