[PATCH -next 2/2] bpf: use memset_range helper in __mark_reg_known
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STALE1763d
From: Xiu Jianfeng <xiujianfeng@huawei.com>
Date: 2021-12-08 03:05:01
Also in:
bpf, lkml
Subsystem:
bpf [core], bpf [general] (safe dynamic programs and tools), the rest · Maintainers:
Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Linus Torvalds
Replace the open-coded memset with memset_range helper to simplify the code, there is no functional change in this patch. Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com> --- kernel/bpf/verifier.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 7a20e12f2e45..317f259c0103 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c@@ -1099,9 +1099,8 @@ static void ___mark_reg_known(struct bpf_reg_state *reg, u64 imm) */ static void __mark_reg_known(struct bpf_reg_state *reg, u64 imm) { - /* Clear id, off, and union(map_ptr, range) */ - memset(((u8 *)reg) + sizeof(reg->type), 0, - offsetof(struct bpf_reg_state, var_off) - sizeof(reg->type)); + /* Clear off, union(map_ptr, range), id, and ref_obj_id */ + memset_range(reg, 0, off, ref_obj_id); ___mark_reg_known(reg, imm); }
--
2.17.1