================================================================== BUG: KCSAN: data-race in __skb_wait_for_more_packets / __sock_queue_rcv_skb read to 0xffff8880b81df0d8 of 8 bytes by task 9867 on cpu 0: __skb_wait_for_more_packets+0xfa/0x320 net/core/datagram.c:100 __skb_recv_datagram+0xf0/0x160 net/core/datagram.c:310 skb_recv_datagram+0x76/0xb0 net/core/datagram.c:321 rawv6_recvmsg+0x14d/0x7e0 net/ipv6/raw.c:480 sock_common_recvmsg+0x91/0x100 net/core/sock.c:3131 sock_recvmsg_nosec+0x5c/0x70 net/socket.c:871 ___sys_recvmsg+0x1a0/0x3e0 net/socket.c:2480 do_recvmmsg+0x19a/0x5c0 net/socket.c:2601 __sys_recvmmsg+0x1ef/0x200 net/socket.c:2680 __do_sys_recvmmsg net/socket.c:2703 [inline] __se_sys_recvmmsg net/socket.c:2696 [inline] __x64_sys_recvmmsg+0x89/0xb0 net/socket.c:2696 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff8880b81df0d8 of 8 bytes by interrupt on cpu 1: __skb_insert include/linux/skbuff.h:1852 [inline] __skb_queue_before include/linux/skbuff.h:1958 [inline] __skb_queue_tail include/linux/skbuff.h:1991 [inline] __sock_queue_rcv_skb+0x369/0x5d0 net/core/sock.c:477 sock_queue_rcv_skb+0x4f/0x70 net/core/sock.c:494 rawv6_rcv_skb net/ipv6/raw.c:401 [inline] rawv6_rcv+0x4f6/0x930 net/ipv6/raw.c:452 ipv6_raw_deliver net/ipv6/raw.c:219 [inline] raw6_local_deliver+0x268/0x600 net/ipv6/raw.c:235 ip6_protocol_deliver_rcu+0x27a/0xbe0 net/ipv6/ip6_input.c:359 ip6_input_finish+0x30/0x50 net/ipv6/ip6_input.c:450 NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] ip6_input+0x177/0x190 net/ipv6/ip6_input.c:459 dst_input include/net/dst.h:442 [inline] ip6_rcv_finish+0x110/0x140 net/ipv6/ip6_input.c:76 NF_HOOK include/linux/netfilter.h:305 [inline] NF_HOOK include/linux/netfilter.h:299 [inline] ipv6_rcv+0x1a1/0x1b0 net/ipv6/ip6_input.c:284 __netif_receive_skb_one_core+0xa7/0xe0 net/core/dev.c:5010 __netif_receive_skb+0x37/0xf0 net/core/dev.c:5124 process_backlog+0x1d3/0x420 net/core/dev.c:5955 napi_poll net/core/dev.c:6392 [inline] net_rx_action+0x3ae/0xa90 net/core/dev.c:6460 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 9869 Comm: syz-executor.4 Not tainted 5.4.0-rc3+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================