| Message ID | 20230410085908.98493-1-zhoufeng.zf@bytedance.com |
|---|---|
| Headers | show |
| Series | Fix failure to access u32* argument of tracked function | expand |
On Mon, Apr 10, 2023 at 04:59:06PM +0800, Feng zhou wrote: > From: Feng Zhou <zhoufeng.zf@bytedance.com> > > When access traced function arguments with type is u32*, bpf verifier failed. > Because u32 have typedef, needs to skip modifier. Add btf_type_is_modifier in > is_int_ptr. Add a selftest to check it. > > Feng Zhou (2): > bpf/btf: Fix is_int_ptr() > selftests/bpf: Add test to access u32 ptr argument in tracing program > > Changelog: > v2->v3: Addressed comments from jirka > - Fix an issue that caused other test items to fail > Details in here: > https://lore.kernel.org/all/20230407084608.62296-1-zhoufeng.zf@bytedance.com/ Acked-by: Jiri Olsa <jolsa@kernel.org> jirka > > v1->v2: Addressed comments from Martin KaFai Lau > - Add a selftest. > - use btf_type_skip_modifiers. > Some details in here: > https://lore.kernel.org/all/20221012125815.76120-1-zhouchengming@bytedance.com/ > > kernel/bpf/btf.c | 8 ++------ > net/bpf/test_run.c | 8 +++++++- > .../testing/selftests/bpf/verifier/btf_ctx_access.c | 13 +++++++++++++ > 3 files changed, 22 insertions(+), 7 deletions(-) > > -- > 2.20.1 >
From: Feng Zhou <zhoufeng.zf@bytedance.com> When access traced function arguments with type is u32*, bpf verifier failed. Because u32 have typedef, needs to skip modifier. Add btf_type_is_modifier in is_int_ptr. Add a selftest to check it. Feng Zhou (2): bpf/btf: Fix is_int_ptr() selftests/bpf: Add test to access u32 ptr argument in tracing program Changelog: v2->v3: Addressed comments from jirka - Fix an issue that caused other test items to fail Details in here: https://lore.kernel.org/all/20230407084608.62296-1-zhoufeng.zf@bytedance.com/ v1->v2: Addressed comments from Martin KaFai Lau - Add a selftest. - use btf_type_skip_modifiers. Some details in here: https://lore.kernel.org/all/20221012125815.76120-1-zhouchengming@bytedance.com/ kernel/bpf/btf.c | 8 ++------ net/bpf/test_run.c | 8 +++++++- .../testing/selftests/bpf/verifier/btf_ctx_access.c | 13 +++++++++++++ 3 files changed, 22 insertions(+), 7 deletions(-)