================================================================== BUG: KCSAN: data-race in netlink_recvmsg / netlink_recvmsg write to 0xffff888109d86b08 of 8 bytes by task 11398 on cpu 1: netlink_recvmsg+0xd5/0x750 net/netlink/af_netlink.c:1977 ____sys_recvmsg+0x15d/0x310 include/linux/uio.h:244 ___sys_recvmsg net/socket.c:2646 [inline] do_recvmmsg+0x35c/0x9f0 net/socket.c:2740 __sys_recvmmsg net/socket.c:2819 [inline] __do_sys_recvmmsg net/socket.c:2842 [inline] __se_sys_recvmmsg net/socket.c:2835 [inline] __x64_sys_recvmmsg+0xcf/0x150 net/socket.c:2835 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffff888109d86b08 of 8 bytes by task 11405 on cpu 0: netlink_recvmsg+0x8d/0x750 net/netlink/af_netlink.c:1976 sock_recvmsg_nosec net/socket.c:936 [inline] sock_recvmsg net/socket.c:954 [inline] __sys_recvfrom+0x1d7/0x2a0 net/socket.c:2069 __do_sys_recvfrom net/socket.c:2087 [inline] __se_sys_recvfrom net/socket.c:2083 [inline] __x64_sys_recvfrom+0x74/0x90 net/socket.c:2083 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x00000000000001d7 -> 0x00000000000002ae Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 11405 Comm: syz-executor.3 Not tainted 5.13.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================