diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c
index 2c2bdaa86aa7..3fe87b9d368e 100644
--- a/kernel/bpf/cgroup.c
+++ b/kernel/bpf/cgroup.c
@@ -2343,6 +2343,7 @@ BPF_CALL_3(bpf_sysctl_set_new_value, struct bpf_sysctl_kern *, ctx,
 		return -E2BIG;
 
 	memcpy(ctx->new_val, buf, buf_len);
+	((char *)ctx->new_val)[buf_len] = '\0';
 	ctx->new_len = buf_len;
 	ctx->new_updated = 1;