diff options
| author | Dave Marchevsky <davemarchevsky@fb.com> | 2024-08-13 21:24:22 +0000 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2024-08-23 11:39:33 -0700 |
| commit | d59232afb0344e33e9399f308d9b4a03876e7676 (patch) | |
| tree | b724ac3c01497318febafff4553c00d0e87c3ee0 /include/linux/bpf.h | |
| parent | 7a851ecb180686f9e50110247b0fcd537e772e63 (diff) | |
bpf: Rename ARG_PTR_TO_KPTR -> ARG_KPTR_XCHG_DEST
ARG_PTR_TO_KPTR is currently only used by the bpf_kptr_xchg helper.
Although it limits reg types for that helper's first arg to
PTR_TO_MAP_VALUE, any arbitrary mapval won't do: further custom
verification logic ensures that the mapval reg being xchgd-into is
pointing to a kptr field. If this is not the case, it's not safe to xchg
into that reg's pointee.
Let's rename the bpf_arg_type to more accurately describe the fairly
specific expectations that this arg type encodes.
This is a nonfunctional change.
Acked-by: Martin KaFai Lau <martin.lau@kernel.org>
Signed-off-by: Dave Marchevsky <davemarchevsky@fb.com>
Signed-off-by: Amery Hung <amery.hung@bytedance.com>
Link: https://lore.kernel.org/r/20240813212424.2871455-4-amery.hung@bytedance.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'include/linux/bpf.h')
| -rw-r--r-- | include/linux/bpf.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h index 00dc4dd28cbd..dc63083f76b7 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -744,7 +744,7 @@ enum bpf_arg_type { ARG_PTR_TO_STACK, /* pointer to stack */ ARG_PTR_TO_CONST_STR, /* pointer to a null terminated read-only string */ ARG_PTR_TO_TIMER, /* pointer to bpf_timer */ - ARG_PTR_TO_KPTR, /* pointer to referenced kptr */ + ARG_KPTR_XCHG_DEST, /* pointer to destination that kptrs are bpf_kptr_xchg'd into */ ARG_PTR_TO_DYNPTR, /* pointer to bpf_dynptr. See bpf_type_flag for dynptr type */ __BPF_ARG_TYPE_MAX, |