bpf: Warn on non-preallocated case for BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE

BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE is also tracing type, which may
cause unexpected memory allocation if we set BPF_F_NO_PREALLOC. Let's
also warn on it similar as we do in case of BPF_PROG_TYPE_RAW_TRACEPOINT.

Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20220713160936.57488-1-laoar.shao@gmail.com

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 26e7e787c20adb2a5540ea60a2bffc977a365f80..47fd6efa102a49c555d33884655aeebc2eb7b436 100644 (file)
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -12572,6 +12572,7 @@ static bool is_tracing_prog_type(enum bpf_prog_type type)
        case BPF_PROG_TYPE_TRACEPOINT:
        case BPF_PROG_TYPE_PERF_EVENT:
        case BPF_PROG_TYPE_RAW_TRACEPOINT:
+       case BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE:
                return true;
        default:
                return false;