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

Yafang Shao
2022-06-29T15:49:05Z

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@gmail.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