================================================================== BUG: KCSAN: data-race in __skb_try_recv_from_queue / unix_dgram_sendmsg write to 0xffff8881243f64e0 of 4 bytes by task 11573 on cpu 1: __skb_unlink include/linux/skbuff.h:2022 [inline] __skb_try_recv_from_queue+0x407/0x4e0 net/core/datagram.c:199 __skb_try_recv_datagram+0xfa/0x2c0 net/core/datagram.c:269 unix_dgram_recvmsg+0xfd/0xbf0 net/unix/af_unix.c:2061 sock_recvmsg_nosec net/socket.c:873 [inline] ____sys_recvmsg+0x387/0x3a0 net/socket.c:2551 ___sys_recvmsg+0xb2/0x100 net/socket.c:2595 do_recvmmsg+0x19a/0x5c0 net/socket.c:2693 __sys_recvmmsg+0x1ef/0x200 net/socket.c:2772 __do_sys_recvmmsg net/socket.c:2795 [inline] __se_sys_recvmmsg net/socket.c:2788 [inline] __x64_sys_recvmmsg+0x89/0xb0 net/socket.c:2788 do_syscall_64+0xcc/0x3a0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffff8881243f64e0 of 4 bytes by task 11571 on cpu 0: unix_recvq_full net/unix/af_unix.c:194 [inline] unix_dgram_sendmsg+0xad0/0xdc0 net/unix/af_unix.c:1725 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: 0 PID: 11571 Comm: syz-executor.1 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================