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libbpf: Adjust btf_vlen() to return a __u32

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Now that vlen is 24 bits, btf_vlen() must return a __u32.
Adjust use cases in libbpf accordingly.  Also add error
handling to avoid vlen overflow in btf_type_inc_vlen().

Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Acked-by: Mykyta Yatsenko <yatsenko@meta.com>
Link: https://lore.kernel.org/r/20260417143023.1551481-3-alan.maguire@oracle.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Alan Maguire authored and Andrii Nakryiko committed 2026-05-30 20:45:51 -07:00
1 parent 9801e02973
commit 9c6daf3720
4 files changed
+53 -39
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src/relo_core.c
+8 -8
View File
@@ -191,8 +191,8 @@ recur:
case BTF_KIND_FUNC_PROTO: {
struct btf_param *local_p = btf_params(local_type);
struct btf_param *targ_p = btf_params(targ_type);
__u16 local_vlen = btf_vlen(local_type);
__u16 targ_vlen = btf_vlen(targ_type);
__u32 local_vlen = btf_vlen(local_type);
__u32 targ_vlen = btf_vlen(targ_type);
int i, err;
if (local_vlen != targ_vlen)
@@ -1457,8 +1457,8 @@ static bool bpf_core_names_match(const struct btf *local_btf, size_t local_name_
static int bpf_core_enums_match(const struct btf *local_btf, const struct btf_type *local_t,
const struct btf *targ_btf, const struct btf_type *targ_t)
{
__u16 local_vlen = btf_vlen(local_t);
__u16 targ_vlen = btf_vlen(targ_t);
__u32 local_vlen = btf_vlen(local_t);
__u32 targ_vlen = btf_vlen(targ_t);
int i, j;
if (local_t->size != targ_t->size)
@@ -1498,8 +1498,8 @@ static int bpf_core_composites_match(const struct btf *local_btf, const struct b
bool behind_ptr, int level)
{
const struct btf_member *local_m = btf_members(local_t);
__u16 local_vlen = btf_vlen(local_t);
__u16 targ_vlen = btf_vlen(targ_t);
__u32 local_vlen = btf_vlen(local_t);
__u32 targ_vlen = btf_vlen(targ_t);
int i, j, err;
if (local_vlen > targ_vlen)
@@ -1674,8 +1674,8 @@ recur:
case BTF_KIND_FUNC_PROTO: {
struct btf_param *local_p = btf_params(local_t);
struct btf_param *targ_p = btf_params(targ_t);
__u16 local_vlen = btf_vlen(local_t);
__u16 targ_vlen = btf_vlen(targ_t);
__u32 local_vlen = btf_vlen(local_t);
__u32 targ_vlen = btf_vlen(targ_t);
int i, err;
if (local_k != targ_k)