================================================================== BUG: KCSAN: data-race in udp_lib_setsockopt / udp_lib_setsockopt write to 0xffff8881405bbdb0 of 1 bytes by task 12431 on cpu 1: udp_lib_setsockopt+0x5d9/0x6c0 net/ipv4/udp.c:2700 udpv6_setsockopt+0x73/0xa0 net/ipv6/udp.c:1707 sock_common_setsockopt+0x61/0x70 net/core/sock.c:3697 __sys_setsockopt+0x1c9/0x230 net/socket.c:2263 __do_sys_setsockopt net/socket.c:2274 [inline] __se_sys_setsockopt net/socket.c:2271 [inline] __x64_sys_setsockopt+0x66/0x80 net/socket.c:2271 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd write to 0xffff8881405bbdb0 of 1 bytes by task 12433 on cpu 0: udp_lib_setsockopt+0x5d9/0x6c0 net/ipv4/udp.c:2700 udpv6_setsockopt+0x73/0xa0 net/ipv6/udp.c:1707 sock_common_setsockopt+0x61/0x70 net/core/sock.c:3697 __sys_setsockopt+0x1c9/0x230 net/socket.c:2263 __do_sys_setsockopt net/socket.c:2274 [inline] __se_sys_setsockopt net/socket.c:2271 [inline] __x64_sys_setsockopt+0x66/0x80 net/socket.c:2271 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x03 -> 0x00 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 12433 Comm: syz-executor.2 Not tainted 6.5.0-rc7-syzkaller-00004-gf7757129e3de #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 ==================================================================