===================================================== BUG: KMSAN: uninit-value in __skb_checksum_validate_complete include/linux/skbuff.h:4128 [inline] BUG: KMSAN: uninit-value in icmpv6_rcv+0x2075/0x2cf0 net/ipv6/icmp.c:904 __skb_checksum_validate_complete include/linux/skbuff.h:4128 [inline] icmpv6_rcv+0x2075/0x2cf0 net/ipv6/icmp.c:904 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 ip6_mc_input+0xcab/0xef0 net/ipv6/ip6_input.c:566 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 Uninit was stored to memory at: __skb_postpull_rcsum include/linux/skbuff.h:3467 [inline] skb_postpull_rcsum include/linux/skbuff.h:3487 [inline] ip6_protocol_deliver_rcu+0x1b44/0x2ab0 net/ipv6/ip6_input.c:399 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 ip6_mc_input+0xcab/0xef0 net/ipv6/ip6_input.c:566 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 Uninit was created at: slab_post_alloc_hook mm/slab.h:524 [inline] slab_alloc_node mm/slub.c:3251 [inline] __kmalloc_node_track_caller+0xe0c/0x1510 mm/slub.c:4974 kmalloc_reserve net/core/skbuff.c:354 [inline] __alloc_skb+0x545/0xf90 net/core/skbuff.c:426 __netdev_alloc_skb+0x4b9/0x8c0 net/core/skbuff.c:494 __netdev_alloc_skb_ip_align include/linux/skbuff.h:2934 [inline] netdev_alloc_skb_ip_align include/linux/skbuff.h:2944 [inline] br_ip6_multicast_alloc_query net/bridge/br_multicast.c:992 [inline] br_multicast_alloc_query net/bridge/br_multicast.c:1137 [inline] __br_multicast_send_query+0x1cdd/0x6680 net/bridge/br_multicast.c:1636 br_multicast_send_query+0x9b7/0xb70 net/bridge/br_multicast.c:1725 br_multicast_query_expired net/bridge/br_multicast.c:3811 [inline] br_ip6_multicast_query_expired+0x27f/0x310 net/bridge/br_multicast.c:3831 call_timer_fn+0x81/0x540 kernel/time/timer.c:1421 expire_timers+0x2f5/0x6d0 kernel/time/timer.c:1466 __run_timers+0x66b/0x9f0 kernel/time/timer.c:1734 run_timer_softirq+0x71/0xe0 kernel/time/timer.c:1747 __do_softirq+0x1ee/0x7c5 kernel/softirq.c:558 CPU: 0 PID: 12 Comm: ksoftirqd/0 Not tainted 5.16.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 =====================================================