1301 static int sockopt_alloc_buf(struct bpf_sockopt_kern *ctx, int max_optlen)  in sockopt_alloc_buf()  argument
1303 	if (unlikely(max_optlen < 0))  in sockopt_alloc_buf()
1306 	if (unlikely(max_optlen > PAGE_SIZE)) {  in sockopt_alloc_buf()
1310 		max_optlen = PAGE_SIZE;  in sockopt_alloc_buf()
1313 	ctx->optval = kzalloc(max_optlen, GFP_USER);  in sockopt_alloc_buf()
1317 	ctx->optval_end = ctx->optval + max_optlen;  in sockopt_alloc_buf()
1319 	return max_optlen;  in sockopt_alloc_buf()
1337 	int ret, max_optlen;  in __cgroup_bpf_run_filter_setsockopt()  local
1351 	max_optlen = max_t(int, 16, *optlen);  in __cgroup_bpf_run_filter_setsockopt()
1353 	max_optlen = sockopt_alloc_buf(&ctx, max_optlen);  in __cgroup_bpf_run_filter_setsockopt()
1354 	if (max_optlen < 0)  in __cgroup_bpf_run_filter_setsockopt()
1355 		return max_optlen;  in __cgroup_bpf_run_filter_setsockopt()
1359 	if (copy_from_user(ctx.optval, optval, min(*optlen, max_optlen)) != 0) {  in __cgroup_bpf_run_filter_setsockopt()
1377 	} else if (ctx.optlen > max_optlen || ctx.optlen < -1) {  in __cgroup_bpf_run_filter_setsockopt()
1405 				       int __user *optlen, int max_optlen,  in __cgroup_bpf_run_filter_getsockopt()  argument
1425 	ctx.optlen = max_optlen;  in __cgroup_bpf_run_filter_getsockopt()
1427 	max_optlen = sockopt_alloc_buf(&ctx, max_optlen);  in __cgroup_bpf_run_filter_getsockopt()
1428 	if (max_optlen < 0)  in __cgroup_bpf_run_filter_getsockopt()
1429 		return max_optlen;  in __cgroup_bpf_run_filter_getsockopt()
1445 				   min(ctx.optlen, max_optlen)) != 0) {  in __cgroup_bpf_run_filter_getsockopt()
1461 	if (ctx.optlen > max_optlen) {  in __cgroup_bpf_run_filter_getsockopt()