diff mbox series

[v3,bpf-next,05/17] libbpf: BTF validation can use kind layout for unknown kinds

Message ID 20231110110304.63910-6-alan.maguire@oracle.com (mailing list archive)
State Superseded
Delegated to: BPF
Headers show
Series Add kind layout, CRCs to BTF | expand

Checks

Context Check Description
bpf/vmtest-bpf-next-PR fail merge-conflict
netdev/tree_selection success Clearly marked for bpf-next
netdev/apply fail Patch does not apply to bpf-next
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Commit Message

Alan Maguire Nov. 10, 2023, 11:02 a.m. UTC 
BTF parsing can use kind layout to navigate unknown kinds, so
btf_validate_type() should take kind layout information into
account to avoid failure when an unrecognized kind is met.

Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
---
 tools/lib/bpf/btf.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c
index ed728d0511a4..b2b78ba5e6bf 100644
--- a/tools/lib/bpf/btf.c
+++ b/tools/lib/bpf/btf.c
@@ -699,8 +699,12 @@  static int btf_validate_type(const struct btf *btf, const struct btf_type *t, __
 		break;
 	}
 	default:
-		pr_warn("btf: type [%u]: unrecognized kind %u\n", id, kind);
-		return -EINVAL;
+		/* Kind may be represented in kind layout information. */
+		if (btf_type_size_unknown(btf, t) < 0) {
+			pr_warn("btf: type [%u]: unrecognized kind %u\n", id, kind);
+			return -EINVAL;
+		}
+		break;
 	}
 	return 0;
 }