================================================================== BUG: KCSAN: data-race in __dev_queue_xmit / __dev_queue_xmit read to 0xffff88809b89fa84 of 4 bytes by task 15759 on cpu 0: __dev_queue_xmit+0xb68/0x1ba0 net/core/dev.c:4001 dev_queue_xmit+0x21/0x30 net/core/dev.c:4046 packet_snd net/packet/af_packet.c:2965 [inline] packet_sendmsg+0x1ed8/0x3b60 net/packet/af_packet.c:2990 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0x9f/0xc0 net/socket.c:659 ____sys_sendmsg+0x212/0x4d0 net/socket.c:2330 ___sys_sendmsg+0xb5/0x100 net/socket.c:2384 __sys_sendmmsg+0x123/0x350 net/socket.c:2474 __do_sys_sendmmsg net/socket.c:2503 [inline] __se_sys_sendmmsg net/socket.c:2500 [inline] __x64_sys_sendmmsg+0x64/0x80 net/socket.c:2500 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 write to 0xffff88809b89fa84 of 4 bytes by task 15757 on cpu 1: __netif_tx_lock include/linux/netdevice.h:3935 [inline] __dev_queue_xmit+0x1686/0x1ba0 net/core/dev.c:4009 dev_queue_xmit+0x21/0x30 net/core/dev.c:4046 packet_snd net/packet/af_packet.c:2965 [inline] packet_sendmsg+0x1ed8/0x3b60 net/packet/af_packet.c:2990 sock_sendmsg_nosec net/socket.c:639 [inline] sock_sendmsg+0x9f/0xc0 net/socket.c:659 ____sys_sendmsg+0x212/0x4d0 net/socket.c:2330 ___sys_sendmsg+0xb5/0x100 net/socket.c:2384 __sys_sendmmsg+0x123/0x350 net/socket.c:2474 __do_sys_sendmmsg net/socket.c:2503 [inline] __se_sys_sendmmsg net/socket.c:2500 [inline] __x64_sys_sendmmsg+0x64/0x80 net/socket.c:2500 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 15757 Comm: syz-executor.3 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================