2 Commits

This Branch

This Branch

All Branches

Author	SHA1	Message	Date
KP Singh	397db2175d	libbpf: Load btf_vmlinux only once per object. ... As more programs (TRACING, STRUCT_OPS, and upcoming LSM) use vmlinux BTF information, loading the BTF vmlinux information for every program in an object is sub-optimal. The fix was originally proposed in: https://lore.kernel.org/bpf/CAEf4BzZodr3LKJuM7QwD38BiEH02Cc1UbtnGpVkCJ00Mf+V_Qg@mail.gmail.com/ The btf_vmlinux is populated in the object if any of the programs in the object requires it just before the programs are loaded and freed after the programs finish loading. Reported-by: Andrii Nakryiko <andrii.nakryiko@gmail.com> Signed-off-by: KP Singh <kpsingh@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Reviewed-by: Brendan Jackman <jackmanb@chromium.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/20200117212825.11755-1-kpsingh@chromium.org	2020-01-17 20:33:22 -08:00
KP Singh	e152510d72	libbpf: Fix strncat bounds error in libbpf_prog_type_by_name ... On compiling samples with this change, one gets an error: error: ‘strncat’ specified bound 118 equals destination size [-Werror=stringop-truncation] strncat(dst, name + section_names[i].len, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ sizeof(raw_tp_btf_name) - (dst - raw_tp_btf_name)); ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ strncat requires the destination to have enough space for the terminating null byte. Fixes: f75a697e09137 ("libbpf: Auto-detect btf_id of BTF-based raw_tracepoint") Signed-off-by: KP Singh <kpsingh@google.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20191023154038.24075-1-kpsingh@chromium.org	2019-10-24 22:59:06 -07:00