Commit 5002615a authored by Yafang Shao's avatar Yafang Shao Committed by Daniel Borkmann
Browse files

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: default avatarYafang Shao <laoar.shao@gmail.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Acked-by: default avatarYonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20220713160936.57488-1-laoar.shao@gmail.com
parent ca2e1a62

kernel/bpf/verifier.c

+1 −0
Original line number Diff line number Diff line
@@ -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;