1743 static int sockopt_alloc_buf(struct bpf_sockopt_kern *ctx, int max_optlen,  in sockopt_alloc_buf()  argument
1746 	if (unlikely(max_optlen < 0))  in sockopt_alloc_buf()
1749 	if (unlikely(max_optlen > PAGE_SIZE)) {  in sockopt_alloc_buf()
1753 		max_optlen = PAGE_SIZE;  in sockopt_alloc_buf()
1756 	if (max_optlen <= sizeof(buf->data)) {  in sockopt_alloc_buf()
1761 		ctx->optval_end = ctx->optval + max_optlen;  in sockopt_alloc_buf()
1762 		return max_optlen;  in sockopt_alloc_buf()
1765 	ctx->optval = kzalloc(max_optlen, GFP_USER);  in sockopt_alloc_buf()
1769 	ctx->optval_end = ctx->optval + max_optlen;  in sockopt_alloc_buf()
1771 	return max_optlen;  in sockopt_alloc_buf()
1799 	int ret, max_optlen;  in __cgroup_bpf_run_filter_setsockopt()  local
1805 	max_optlen = max_t(int, 16, *optlen);  in __cgroup_bpf_run_filter_setsockopt()
1806 	max_optlen = sockopt_alloc_buf(&ctx, max_optlen, &buf);  in __cgroup_bpf_run_filter_setsockopt()
1807 	if (max_optlen < 0)  in __cgroup_bpf_run_filter_setsockopt()
1808 		return max_optlen;  in __cgroup_bpf_run_filter_setsockopt()
1812 	if (copy_from_user(ctx.optval, optval, min(*optlen, max_optlen)) != 0) {  in __cgroup_bpf_run_filter_setsockopt()
1828 	} else if (ctx.optlen > max_optlen || ctx.optlen < -1) {  in __cgroup_bpf_run_filter_setsockopt()
1832 				     ctx.optlen, max_optlen);  in __cgroup_bpf_run_filter_setsockopt()
1880 				       int __user *optlen, int max_optlen,  in __cgroup_bpf_run_filter_getsockopt()  argument
1894 	orig_optlen = max_optlen;  in __cgroup_bpf_run_filter_getsockopt()
1895 	ctx.optlen = max_optlen;  in __cgroup_bpf_run_filter_getsockopt()
1896 	max_optlen = sockopt_alloc_buf(&ctx, max_optlen, &buf);  in __cgroup_bpf_run_filter_getsockopt()
1897 	if (max_optlen < 0)  in __cgroup_bpf_run_filter_getsockopt()
1898 		return max_optlen;  in __cgroup_bpf_run_filter_getsockopt()
1920 				   min(ctx.optlen, max_optlen)) != 0) {  in __cgroup_bpf_run_filter_getsockopt()
1934 	if (optval && (ctx.optlen > max_optlen || ctx.optlen < 0)) {  in __cgroup_bpf_run_filter_getsockopt()
1937 				     ctx.optlen, max_optlen);  in __cgroup_bpf_run_filter_getsockopt()