From: Kumar Kartikeya Dwivedi memxor@gmail.com
[ Upstream commit 58bfd95b554f1a23d01228672f86bb489bdbf4ba ]
Otherwise, there exists a small window between the opening and closing of the socket fd where it may leak into processes launched by some other thread.
Fixes: 949abbe88436 ("libbpf: add function to setup XDP") Signed-off-by: Kumar Kartikeya Dwivedi memxor@gmail.com Signed-off-by: Daniel Borkmann daniel@iogearbox.net Acked-by: Toke Høiland-Jørgensen toke@redhat.com Link: https://lore.kernel.org/bpf/20210317115857.6536-1-memxor@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- tools/lib/bpf/netlink.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/lib/bpf/netlink.c b/tools/lib/bpf/netlink.c index 4dd73de00b6f..d2cb28e9ef52 100644 --- a/tools/lib/bpf/netlink.c +++ b/tools/lib/bpf/netlink.c @@ -40,7 +40,7 @@ static int libbpf_netlink_open(__u32 *nl_pid) memset(&sa, 0, sizeof(sa)); sa.nl_family = AF_NETLINK;
- sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); + sock = socket(AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_ROUTE); if (sock < 0) return -errno;