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BUG: KCSAN: data-race in __dev_queue_xmit / __dev_queue_xmit

write to 0xffff888110bd1884 of 4 bytes by task 5705 on cpu 1:
 __netif_tx_lock include/linux/netdevice.h:3904 [inline]
 __dev_queue_xmit+0x1666/0x1b60 net/core/dev.c:3869
 dev_queue_xmit+0x21/0x30 net/core/dev.c:3906
 packet_snd net/packet/af_packet.c:2959 [inline]
 packet_sendmsg+0x1e91/0x3af0 net/packet/af_packet.c:2984
 sock_sendmsg_nosec net/socket.c:637 [inline]
 sock_sendmsg+0x9f/0xc0 net/socket.c:657
 ___sys_sendmsg+0x2b7/0x5d0 net/socket.c:2311
 __sys_sendmmsg+0x123/0x350 net/socket.c:2413
 __do_sys_sendmmsg net/socket.c:2442 [inline]
 __se_sys_sendmmsg net/socket.c:2439 [inline]
 __x64_sys_sendmmsg+0x64/0x80 net/socket.c:2439
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

read to 0xffff888110bd1884 of 4 bytes by task 5691 on cpu 0:
 __dev_queue_xmit+0xca8/0x1b60 net/core/dev.c:3861
 dev_queue_xmit+0x21/0x30 net/core/dev.c:3906
 packet_snd net/packet/af_packet.c:2959 [inline]
 packet_sendmsg+0x1e91/0x3af0 net/packet/af_packet.c:2984
 sock_sendmsg_nosec net/socket.c:637 [inline]
 sock_sendmsg+0x9f/0xc0 net/socket.c:657
 ___sys_sendmsg+0x2b7/0x5d0 net/socket.c:2311
 __sys_sendmmsg+0x123/0x350 net/socket.c:2413
 __do_sys_sendmmsg net/socket.c:2442 [inline]
 __se_sys_sendmmsg net/socket.c:2439 [inline]
 __x64_sys_sendmmsg+0x64/0x80 net/socket.c:2439
 do_syscall_64+0xcc/0x370 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 5691 Comm: syz-executor.2 Not tainted 5.4.0-rc3+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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