bpf: make bpf_copy_from_user_task() gpl only

access_process_vm() is exported by EXPORT_SYMBOL_GPL().

Signed-off-by: Kenta Tada <Kenta.Tada@sony.com>
Link: https://lore.kernel.org/r/20220128170906.21154-1-Kenta.Tada@sony.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c
index ed2780b76cc1950aee1c24426b36646d85d70685..4e5969fde0b39e49afe9625f71aa822dcf6acfc4 100644 (file)
--- a/kernel/bpf/helpers.c
+++ b/kernel/bpf/helpers.c
@@ -695,7 +695,7 @@ BPF_CALL_5(bpf_copy_from_user_task, void *, dst, u32, size,
 
 const struct bpf_func_proto bpf_copy_from_user_task_proto = {
        .func           = bpf_copy_from_user_task,
-       .gpl_only       = false,
+       .gpl_only       = true,
        .ret_type       = RET_INTEGER,
        .arg1_type      = ARG_PTR_TO_UNINIT_MEM,
        .arg2_type      = ARG_CONST_SIZE_OR_ZERO,