netdev - [PATCH bpf-next 2/4] bpf: Warn on non-preallocated case for missed trace types

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Date:   Wed, 29 Jun 2022 15:48:30 +0000
From:   Yafang Shao <laoar.shao@...il.com>
To:     ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
        kafai@...com, songliubraving@...com, yhs@...com,
        john.fastabend@...il.com, kpsingh@...nel.org, quentin@...valent.com
Cc:     netdev@...r.kernel.org, bpf@...r.kernel.org,
        Yafang Shao <laoar.shao@...il.com>
Subject: [PATCH bpf-next 2/4] bpf: Warn on non-preallocated case for missed trace types

BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE and BPF_PROG_TYPE_TRACING are
trace type as well, which may also cause unexpected memory allocation if
we set BPF_F_NO_PREALLOC.
Let's also warn on both of them.

Signed-off-by: Yafang Shao <laoar.shao@...il.com>
---
 kernel/bpf/verifier.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 4938477912cd..8452e5746f59 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -12539,6 +12539,8 @@ 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:
+	case BPF_PROG_TYPE_TRACING:
 		return true;
 	default:
 		return false;
-- 
2.17.1