From: Hou Tao <houtao1@xxxxxxxxxx>
Hi,
The patch set adds the missed check again info_cnt when flattening the
array of nested struct. The problem was spotted when developing dynptr
key support for hash map. Patch #1 adds the missed check and patch #2
adds three success test cases and one failure test case for the problem.
Comments are always welcome.
Change Log:
v2:
* patch #1: check info_cnt in btf_repeat_fields()
* patch #2: use a hard-coded number instead of BTF_FIELDS_MAX, because
BTF_FIELDS_MAX is not always available in vmlinux.h (e.g.,
for llvm 17/18)
v1: https://lore.kernel.org/bpf/20240911110557.2759801-1-houtao@xxxxxxxxxxxxxxx/T/#t
Hou Tao (2):
bpf: Check the remaining info_cnt before repeating btf fields
selftests/bpf: Add more test case for field flattening
kernel/bpf/btf.c | 14 +++-
.../selftests/bpf/prog_tests/cpumask.c | 1 +
.../selftests/bpf/progs/cpumask_common.h | 5 ++
.../selftests/bpf/progs/cpumask_failure.c | 35 +++++++++
.../selftests/bpf/progs/cpumask_success.c | 78 ++++++++++++++++++-
5 files changed, 127 insertions(+), 6 deletions(-)
--
2.29.2
