=====================================================
BUG: KMSAN: uninit-value in memcmp lib/string.c:778 [inline]
BUG: KMSAN: uninit-value in bcmp+0x14e/0x290 lib/string.c:810
 memcmp lib/string.c:778 [inline]
 bcmp+0x14e/0x290 lib/string.c:810
 ip6frag_obj_cmpfn+0x93/0x110 include/net/ipv6_frag.h:60
 __rhashtable_lookup include/linux/rhashtable.h:601 [inline]
 rhashtable_lookup include/linux/rhashtable.h:638 [inline]
 inet_frag_find+0x591/0x2a60 net/ipv4/inet_fragment.c:362
 fq_find net/ipv6/reassembly.c:99 [inline]
 ipv6_frag_rcv+0x180a/0x4370 net/ipv6/reassembly.c:374
 ip6_protocol_deliver_rcu+0xe7c/0x2ab0 net/ipv6/ip6_input.c:422
 ip6_input_finish net/ipv6/ip6_input.c:463 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ip6_input+0x130/0x390 net/ipv6/ip6_input.c:472
 dst_input include/net/dst.h:460 [inline]
 ip6_rcv_finish+0x670/0x850 net/ipv6/ip6_input.c:76
 NF_HOOK include/linux/netfilter.h:307 [inline]
 ipv6_rcv+0x1d1/0x460 net/ipv6/ip6_input.c:297
 __netif_receive_skb_one_core net/core/dev.c:5465 [inline]
 __netif_receive_skb+0x1ec/0x630 net/core/dev.c:5579
 process_backlog+0x54b/0xc10 net/core/dev.c:6455
 __napi_poll+0x14c/0xc00 net/core/dev.c:7023
 napi_poll net/core/dev.c:7090 [inline]
 net_rx_action+0x7e2/0x1820 net/core/dev.c:7177
 __do_softirq+0x1ee/0x7c5 kernel/softirq.c:558
 run_ksoftirqd+0x33/0x50 kernel/softirq.c:921
 smpboot_thread_fn+0x606/0xbd0 kernel/smpboot.c:164
 kthread+0x721/0x850 kernel/kthread.c:327
 ret_from_fork+0x1f/0x30

Local variable key.i created at:
 fq_find net/ipv6/reassembly.c:86 [inline]
 ipv6_frag_rcv+0x1648/0x4370 net/ipv6/reassembly.c:374
 ip6_protocol_deliver_rcu+0xe7c/0x2ab0 net/ipv6/ip6_input.c:422

CPU: 1 PID: 18 Comm: ksoftirqd/1 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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