From: Dan Carpenter dan.carpenter@oracle.com
[ Upstream commit 4172843ed4a38f97084032f74f07b2037b5da3a6 ]
The btf__resolve_size() function returns negative error codes so "elem_size" must be signed for the error handling to work.
Fixes: 920d16af9b42 ("libbpf: BTF dumper support for typed data") Signed-off-by: Dan Carpenter dan.carpenter@oracle.com Signed-off-by: Daniel Borkmann daniel@iogearbox.net Acked-by: Yonghong Song yhs@fb.com Link: https://lore.kernel.org/bpf/20220208071552.GB10495@kili Signed-off-by: Sasha Levin sashal@kernel.org --- tools/lib/bpf/btf_dump.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/tools/lib/bpf/btf_dump.c b/tools/lib/bpf/btf_dump.c index 5cae71600631..700dfd362c4a 100644 --- a/tools/lib/bpf/btf_dump.c +++ b/tools/lib/bpf/btf_dump.c @@ -1839,14 +1839,15 @@ static int btf_dump_array_data(struct btf_dump *d, { const struct btf_array *array = btf_array(t); const struct btf_type *elem_type; - __u32 i, elem_size = 0, elem_type_id; + __u32 i, elem_type_id; + __s64 elem_size; bool is_array_member;
elem_type_id = array->type; elem_type = skip_mods_and_typedefs(d->btf, elem_type_id, NULL); elem_size = btf__resolve_size(d->btf, elem_type_id); if (elem_size <= 0) { - pr_warn("unexpected elem size %d for array type [%u]\n", elem_size, id); + pr_warn("unexpected elem size %lld for array type [%u]\n", elem_size, id); return -EINVAL; }