diff mbox series

[bpf,v2,3/4] libbpf: Fix incorrect traversal end type ID when marking BTF_IS_EMBEDDED

Message ID 20250115100241.4171581-3-pulehui@huaweicloud.com (mailing list archive)
State New
Delegated to: BPF
Headers show
Series [bpf,v2,1/4] selftests/bpf: Fix btf leak on new btf alloc failure in btf_distill test | expand

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Commit Message

Pu Lehui Jan. 15, 2025, 10:02 a.m. UTC 
From: Pu Lehui <pulehui@huawei.com>

When redirecting the split BTF to the vmlinux base BTF, we need to mark
the distilled base struct/union members of split BTF structs/unions in
id_map with BTF_IS_EMBEDDED. This indicates that these types must match
both name and size later. Therefore, we need to traverse the entire
split BTF, which involves traversing type IDs from nr_dist_base_types to
nr_types. However, the current implementation uses an incorrect
traversal end type ID, so let's correct it.

Fixes: 19e00c897d50 ("libbpf: Split BTF relocation")
Signed-off-by: Pu Lehui <pulehui@huawei.com>
---
v2: make commit description more sense.

 tools/lib/bpf/btf_relocate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/tools/lib/bpf/btf_relocate.c b/tools/lib/bpf/btf_relocate.c
index b72f83e15156..53d1f3541bce 100644
--- a/tools/lib/bpf/btf_relocate.c
+++ b/tools/lib/bpf/btf_relocate.c
@@ -212,7 +212,7 @@  static int btf_relocate_map_distilled_base(struct btf_relocate *r)
 	 * need to match both name and size, otherwise embedding the base
 	 * struct/union in the split type is invalid.
 	 */
-	for (id = r->nr_dist_base_types; id < r->nr_split_types; id++) {
+	for (id = r->nr_dist_base_types; id < r->nr_dist_base_types + r->nr_split_types; id++) {
 		err = btf_mark_embedded_composite_type_ids(r, id);
 		if (err)
 			goto done;